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920-235 Nortel VPN Gateway Rls.7.0 Configuration and Management

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920-235 exam Dumps Source : Nortel VPN Gateway Rls.7.0 Configuration and Management

Test Code : 920-235
Test title : Nortel VPN Gateway Rls.7.0 Configuration and Management
Vendor title : Nortel
: 62 real Questions

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Nortel Nortel VPN Gateway Rls.7.0

Nortel Intros VPN Gateway | killexams.com real Questions and Pass4sure dumps

SANTA CLARA, Calif. -- Nortel Networks (NYSE:NT)(TSX:NT) these days announced a complete protection framework supported by means of fresh products to exist able to permit enterprise shoppers to dispose of the boundaries of their present communications infrastructure. Nortel Networks relaxed mobility framework is designed to permit organizations to give relaxed, flexible access to multimedia content material in converged networks for cell and far off users -- from anywhere and from any device -- whereas positioning businesses to drive dramatically lessen fees.

Nortel Networks fresh relaxed mobility framework is designed to support enterprise valued clientele pressure as much as a 35 p.c discount of far off entry charges, according to Nortel Networks estimates. The framework gives a simplified security infrastructure that can aid agencies to minimize total can pervade of ownership by doing away with the should install divide solutions. A key constituent of here is centralized protection management throughout loads of structures, enabling deployment of protection guidelines in the most low in cost and constant manner.

The virtual deepest Networking (VPN) products brought as a allotment of this cozy mobility framework consist of a gateway anticipated to exist the industry's first to proffer each comfortable Socket Layer (SSL) and internet Protocol protection (IPSec) VPNs from the equal device.

also delivered absorb been a hardware retort in order to carry SSL VPN capabilities to the present Nortel Networks Contivity comfortable IP capabilities Gateway portfolio and VPN gateway products; a brand fresh Contivity product that offers IPSec VPNs and firewalls for teleworkers and remote offices; a at ease VPN portal answer; and enhancements to latest items that deliver business-leading security to each wired and instant local enviornment networks.

"proposing a finished, built-in approach to managing and enabling secure far flung access is significant in concurrent mobile atmosphere," pointed out John Girard, vice chairman and research director, Gartner. "The far off user must exist able to focus on their job and not community entry concerns to exist advantageous. organizations will improvement if they are capable of spend a solitary VPN platform to provision either SSL or IPSec with regular interfaces for management, access controls and user interface."

"Analog instruments carried out a Contivity-based VPN retort pretty much three years ago," celebrated Lawrence W. Loh, chief counsel officer, Analog instruments. "This has been very successful, and in consequence their prefatory implementation of at ease, web-based mostly entry has accelerated to a a noteworthy deal bigger number of their personnel and partners."

"Our carcass of workers has develop into more and more more cell and we've multiplied their spend of converged applications, combining voice and facts over a solitary connection," Loh noted. "Nortel Networks cozy mobility strategy is redress on the prerogative track, because it will combine IPSec and SSL. it's going to additionally address the bigger problem of enforcing a comfy, multimedia-equipped infrastructure across the discrete dimensions of security, entry, administration and management."

a allotment of Nortel Networks 'One community. a world of choice.' commercial enterprise technology vision, the at ease mobility framework is designed to allow groups to enlarge the effectiveness of their company operations with out compromising community performance or protection, whereas assisting unrestricted mobility of commerce tourists and far off clients.

"Nortel Networks is familiar with the challenges of far off entry security," celebrated Atul Bhatnagar, vice chairman and well-liked manager, enterprise information Networks, Nortel Networks. "The grotesque thing about this solution is that it combines managed far off entry, comfortable virtual inner most networks and superior multimedia conversation purposes to carry relaxed anyplace, each time multimedia entry. This strategy is designed to boost employee productivity and offers the expertise to capitulate a significantly-decreased total can pervade of possession for a far flung entry infrastructure."

Managing loads of distinctive far off access methods, policies, customers, updates, patches and VPN solutions is complex, elevated priced and time-consuming. Nortel Networks relaxed mobility framework is designed to deliver extended degrees of access and simplify administration without compromising the security, control and manageability of existing VPN deployments.

providing the basis of the relaxed mobility framework, prerogative here products are the latest additions to the enterprise's protection portfolio:

  • Nortel Networks VPN Gateway 3050 -- The industry's first to blend SSL VPN connectivity with IPSec VPNs, this product will give the better of both worlds in far flung entry, enabling end-clients to access the applications they require, despite no matter if they are the usage of IPSec or SSL connections. The VPN Gateway 3050 will support up to 1,000 SSL or 500 IPSec tunnels, and dramatically simplifies the protection infrastructure by using having a solitary gateway to installation and maintain for both sorts of entry.
  • Nortel network Contivity 200 VPN switch -- this could build on the award-profitable security capabilities of the Contivity product line in a package most reliable for teleworkers and faraway places of work. Designed for fundamental deployment, Contivity 200 will charge-effortlessly provide VPNs, firewalls, protection from denial of carrier attacks and content material filtering.
  • Nortel Networks Contivity relaxed IP functions Gateway Portfolio
  • A hardware better will permit fresh and current Contivity products to provide SSL VPNs, as a result retaining existing client investments and enhancing Contivity's award-successful IPSec VPN capabilities.
  • Nortel Networks frequent far off entry Portal -- A portal solution that allows you to assess probably the most applicable VPN entry by the spend of an SSL or IPSec VPN, reckoning on the circumstance of the end-person, the protection profile based by means of the administrator, or the network supplies they entry.
  • Nortel Networks VPN client Administrator -- concentrated on valued clientele that manage a tremendous variety of VPN users, the VPN client Administrator will give seamless computerized distribution of Contivity IPSec client and policy updates to end-users. this will purge complicated technical hurdles to maintaining a comfy VPN infrastructure.
  • Nortel Networks Corp.

    Nortel extends VPN capabilities | killexams.com real Questions and Pass4sure dumps

    Nortel Networks has launched a yoke of items to assist its fresh safety framework, which is designed to eradicate boundaries in present communications infrastructures. The seller's goal is to enable conclusion clients to provide relaxed, flexible access to multimedia content in converged networks for both mobile and remote users via any device, from any area. moreover, Nortel is asking to power down fees with the aid of reducing the fees of remote person entry by up to 35%.Reinforcing this intent is a variety of items including a virtual private networking (VPN) gateway that helps each cozy socket layer (SSL) and IPSec VPNs within the selfsame machine. moreover, the Contivity cozy IP features Gateway Portfolio will interpolate SSL VPN capabilities to the dealer's current Contivity range, while the Contivity 200 change will proffer VPNs, firewalls and insurance blueprint from denial of carrier (DoS) assaults.furthermore, Nortel is offering the universal faraway entry Portal, so as to check probably the most usurp VPN access for users, as neatly because the VPN customer Administrator, which is designed for organisations with a tremendous number of VPN clients."Nortel Networks understands the challenges of far flung entry safety," says Atul Bhatnagar, vice president & ordinary supervisor, commercial enterprise records networks, Nortel Networks. "The noteworthy thing about this solution is it is combines managed remote access, relaxed digital deepest networks and superior multimedia communique applications to convey cozy any place, each time multimedia entry. This approach is designed to enlarge worker productiveness and presents the learning to capitulate a drastically diminished total pervade of ownership for a far flung access infrastructure," he continues.

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    Nortel uses USB drive to secure far off toil | killexams.com real Questions and Pass4sure dumps

    Nortel hopes to ply the protection of far flung toil with an "office on a stick," a USB pressure that can hyperlink an employee's laptop with a company VPN and hold the entire suggestions from a session encrypted.

    The drive itself, comparable to a customary USB (commonplace Serial Bus) drive with 1G byte or 2G bytes of storage, is only one piece of the Nortel comfortable moveable workplace, a product that likewise comprises a Nortel VPN (digital private community) gateway and functions to aid companies installation guidelines and consumer permissions.

    As toil becomes extra cell for many companies, IT departments are coming up against the simultaneous boom of privateness regulations and concerns about records theft. They commonly spend application VPNs to retain faraway toil at ease, but Nortel is aiming to enact so without the want for VPN client application or URLs (uniform aid locators) that personnel ought to endure in mind. With the application for a VPN session alive on the USB power, users can likewise log in from basically any computer.

    to earn spend of the USB stick, employees can comfortably plug it prerogative into a USB port and enter a username and password, talked about Rod Wallace, director of protection services and options at Nortel. utility on the stick first assessments the computer for viruses and required safety mechanisms, after which sets up an encrypted far off session. It customarily will give entry to remote functions by means of the net browser or a different system. it might absolutely select over the gadget using a faraway desktop and obscure off printing, doc-saving and far flung drives, preventing personnel from improperly copying delicate records.

    The faraway session is encrypted and everything facts the worker enters or downloads can ebb directly from the notebook's reminiscence onto the encrypted USB drive, Wallace said. because of this, IT administrators can understand that sensitive tips is never out on this planet on PCs they can't manage. policies can exist configured so that users who plug the power into less-comfortable PCs salvage either confined or no access to applications, he noted.

    One location the cozy portable office has been deployed is with neighborhood-primarily based midwives who toil for Liverpool girls's hospital in England. they could enter and access patient statistics whereas away from the sanatorium and hold them inner most, with out desiring client software or complicated log-in procedures, Wallace said.

    The Nortel comfy transportable office is accessible international. For a gauge commercial enterprise deployment aiding one hundred or greater concurrent users, it prices between US$30,000 and $60,000 for the complete gear including features.

    To paw upon this text and other PCWorld content material, talk over with their facebook web page or their Twitter feed.

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    Nortel VPN Gateway Rls.7.0 Configuration and Management

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    Nortel VPN Gateway 3050 | killexams.com real questions and Pass4sure dumps


    Setting up this product is not a simple task. Most of the setup is done via the command line, but the documentation does not alleviate guide through this process very well. They found ourselves looking through different guides trying to locate configuration information. The absence of a quickstart card or a getting started guide makes this assignment even more difficult.

    Once the appliance is configured, there is a web interface, but it is awkward and minimal at best. Overall management and administration tasks are difficult as well.

    The main focus of the Nortel VPN Gateway is to provide security for VPN connections. This includes encryption that supports authenticated and encrypted connections, both internally and externally. The device can likewise terminate suspicious connections without leaving a trace on the user device. Furthermore, it supports an enhanced clientless mode that runs applets in the browser to build VPN tunnels for client/server applications.

    The VPN Gateway 3050 uses certificate-based authentication as well as two-factor and token based. Other types of authentication are likewise supported, including local authentication database, LDAP, Radius, NTLM, energetic Directory and Netegrity services support. One of this appliance’s strengths is its scalability. It is intended to support large-scale data-centre operations that require SSL VPN capabilities.

    We found documentation for this product to exist difficult to succeed and not very well organized. The documentation is provided on a divide CD.

    When this is loaded, it displays a welcome screen that lists everything of the guides and manuals. In all, there are seven different manuals, some of which are hundreds of pages long.

    We found ourselves searching through tons of documentation trying to find answers to configuration and setup questions. However, they did find the documentation to exist complete if you absorb the forbearance to search for what you need.

    Nortel offers technical assistance via phone and email, as well as much more in-depth support in the form of an additional support contract. Other areas of alleviate provided are a learning base, training and certification options.

    We did not receive pricing information for this product and, therefore absorb not evaluated it in this category.

    Setting up a VPN Gateway | killexams.com real questions and Pass4sure dumps

    A virtual private network (VPN) is a implement that enables the secure transmission of data over untrusted networks such as the Internet. VPNs commonly are used to connect local zone networks (LANs) into wide zone networks (WANs) using the Internet. Perhaps you requisite to build a VPN between two offices but are not confident if the large infrastructure costs associated with an enterprise-level VPN solution are justifiable. The performance of applications that are intended for spend over LANs (for case those that spend network file sharing) seriously can exist degraded over WAN connections. Likewise, lower bandwidth and longer latency in WAN connections can strike adversely the reliability and performance of groupware and thin-client applications. Perhaps you absorb a home office and would relish to spend your high-speed internet access to connect seamlessly and securely to your office LAN through an IPSec-capable router. Or perhaps you are just curious about VPNs and IPSec in general and want to experiment.

    The VPN firewall discussed in this article will flee on just about any 486-or-better PC that has 16MB or more main recollection and two Linux-compatible Ethernet network cards. The view is to provide a starting point from a single, self-contained package that will allow you to create robust, secure, scalable and highly configurable VPNs that likewise are interoperable with many common commercial VPN implementations. If you wish to experiment on a low-maintenance firewall-VPN gateway, then the package discussed here might exist ideal for you.

    This article shows you how to set up, at minimal expense, a working VPN gateway that uses the IETF's (Internet Engineering assignment Force) IPSec (internet protocol security) specification. IPSec is an open gauge and is supported by virtually everything major firewall software and hardware vendors, such as Lucent, Cisco, Nortel and Check Point. This package will give you a widely interoperable IPSec that uses the de facto gauge 3DES encrypted, MD5-authenticated site-to-site or point-to-site VPN. You should exist able to enact this without resorting to a complete Linux distribution or recompiling a gauge Linux kernel with a kernel IPSec module.

    The VPN system they examine here is based on FreeS/WAN (www.freeswan.org), a portable, open-source implementation of the IPSec specification. FreeS/WAN has been demonstrated to interoperate, to various degrees, with Cisco IOS 12.0 and later routers, Nortel Contivity Switches, OpenBSD, Raptor Firewall, Check Point FW-1, SSH Sentinel VPN 1.1, F-Secure VPN, Xedia Access Point, PGP 6.5/PGPnet and later, IRE SafeNet/SoftPK, Freegate 1.3, Borderware 6.0, TimeStep PERMIT/Gate 2520, Intel Shiva LanRover, Sun Solaris and Windows 2000. The official FreeS/WAN web site has a regularly updated compatibility list with the latest version of its on-line documentation. FreeS/WAN version 1.5 is included in this package.

    I absorb created a single-diskette distribution that installs the foundation configuration of a VPN firewall based on the Linux Router Project (LRP, www.linuxrouter.org), a compact Linux distribution that can appropriate on a single, bootable floppy diskette. The distribution here is essentially Charles Steinkuehler's Eiger disk image with Steinkuehler's IPSec-enabled kernel and LRP IPSec package. Firewalling is carried out through Linux ipchains. This particular version is based on the 2.2.16 kernel of Linux. This distribution is called DUCLING (Diskette-based Ultra Compact Linux IPSec Network Gateway). Compact Linux distributions absorb a twisted history. LRP technically refers to Dave Cinege's compact distribution. There are many variants around, including Charles Steinkuehler's distribution (EigerStein) of Matthew Grant's defunct Eiger version (lrp1.steinkuehler.net). Another such distribution is David Douthitt's Oxygen (leaf.sourceforge.net/content.php?menu=900&page_id=1). Also, there is LEAF (Linux Embedded Appliance Firewall), a developer's umbrella that tries to coordinate releases and documentation, sort of relish a one-stop shop for compact Linux distributions (leaf.sourceforge.net). I spend the term LRP to advert to the compact Linux distribution presented here, even though some may deem this terminology incorrect.

    If you are running MS Windows 9x, the distribution self-extracts and installs itself onto a gauge 3.5", high-density floppy diskette. You likewise can write the image to a boot floppy if you absorb a system running Linux. Once the extraction is done, you will requisite to boot off the floppy disk you absorb created, copy the network drivers for your network cards over and edit the usurp configuration files. That's it—no creating and formatting disk partitions or messing with boot managers on your hard drive. If you are not lighthearted with the distribution, just pop the diskette out, fling it away (or reformat it) and reboot your PC. Check the links on leaf.sourceforge.net/devel/thc for more information on these options.

    Background on the Firewall and the VPN

    This distribution of LRP uses a gauge ipchains-based firewall. ipchains (replaced by iptables in the 2.4 succession kernels—see David A. Bandel's “Taming the Wild Netfilter”, LJ, September 2001) is a freely distributed packet filter for Linux. It is very instructive to notice through the ipchains HOWTO if you are not familiar with this firewalling tool. This can exist found at www.linuxdoc.org/HOWTO/IPCHAINS-HOWTO.html.

    The VPN is provided by FreeS/WAN's implementation of IPSec. FreeS/WAN's IPSec implementation is compliant with the IETF's IPSec specification. IPSec is an extension to the Internet Protocol (IP) that provides for authentication and encryption. Three protocols are used to ply encryption and authentication, namely ESP (Encapsulating Security Payload), AH (Authentication Header) and IKE (the Internet Key Exchange). everything these components are included in the FreeS/WAN implementation of IPSec and generally are transparent to discontinuance users. ESP and AH ply encryption and authentication, while IKE negotiates the connection parameters, including the initialization, handling and renewal of encryption keys. The only encryption scheme currently supported by FreeS/WAN is 3DES (the triple DES or Data Encryption Standard—the current de facto gauge for IPSec encryption). Authentication is carried out using MD5 digests of a so-called shared surreptitious (a shared key). The shared key could exist a mutually agreed-to character string, RSA cryptographic key pairs or X.509 certificates. FreeS/WAN's KLIPS (kernel IPSec) component, which is compiled into the Linux kernel, implements AH, ESP and the handling of packets. IKE processes ply key negotiation, and renewals are implemented in FreeS/WAN's standalone pluto dæmon.

    Requirements and Installation

    First, you will requisite a PC with a floppy disk drive (I absorb tested only 3.5" disk drives) and two network cards in it. The demands of LRP (the distribution) are minimal and enact not require a powerful PC. Anything that is Intel 486-class or better with more than 8MB of RAM will do. You likewise will requisite two floppy disks. Reliable, high-density 3.5" floppy disks should do, such as promotional diskettes from AOL. I absorb never had any problems with generic floppy disk drives, but I absorb found some problems with writing the distribution to floppy disks with Imation USB U2 SuperDisk drives.

    You will requisite to download the usurp DUCLING.tgz/zip distribution from ftp.cinemage.com/pub and extract the contents of the archive file. If you absorb a static IP address, then download the static version, and if you are assigned a dynamic IP address, you will requisite the distribution with a DHCP client. If you are running Windows 9x, download ducling-stat-W9x-1-0.zip or ducling-dyn-W9x-1-0.zip. Extracting the .tgz file with Winzip (www.winzip.com) will capitulate a file, ducling-dyn-1-0.exe or ducling-stat-1-0.exe and directory modules. The .exe file is a self-extracting image that formats a floppy disk and writes the image to that disk. flee the ducling-stat-1-0.exe or ducling-dyn-1-0.exe file and station a floppy disk into the floppy disk drive. Note that any data on the disk will exist overwritten.

    If you are using MS-DOS or Windows 3.1, the TSR utility FDREAD.EXE must exist loaded at the DOS flush first if you wish to read and write to the 1,722KB format disk. FDREAD.EXE is a freeware program from Christoph H. Hochstätter.

    If you are running Linux, download ducling-dyn-1-0.tgz or ducling-stat-1-0.tgz, untar the image (the case here is for the DHCP-enabled dynamic IP address distribution):

    tar xvfz ducling-dyn-1-0.tgz

    and write the image file, ducling-1-0.img, to a formatted floppy using the Linux fdformat and dd commands:

    fdformat /dev/fd0u1722 dd if=ducling-dyn-1-0.ima of=/dev/fd0u1722 Once the floppy disk image is created as mentioned above, you will absorb a bootable Linux floppy diskette.

    The zipfile/directory named modules hold the required network driver modules as well as optional modules for firewall masquerading. Copy the contents of the module zipfile or directory onto a divide second MS-DOS-formatted floppy diskette for the configuration portion of this discussion (below). In Linux, format a second floppy disk by running

    fdformat /dev/fd0

    followed by

    mkdosfs /dev/fd0 and mounting the floppy drive and copying the modules over. Read the documentation included in the README files, which will give you details on configuring your firewall/router.

    If you are unable to appropriate everything the desired packages and modules onto a solitary floppy diskette, you will requisite to examine alternative setups that spend dual floppy diskettes (see the included README files with the DUCLING distribution), a bootable CD-ROM or even a miniature hard disk. advert to the on-line sources of LRP documentation for further information.

    The LRP Boot Floppies—The Surprising Truth

    You may exist surprised to ascertain that LRP uses DOS-formatted floppies. You may exist even more surprised to ascertain that the DUCLING distribution installs itself as a 1,722KB bootable disk image. The 3.5" high-density floppy is technically a 2MB format medium, and you may observe these diskettes rated as 2MB “raw” or “unformatted” capacity. The 1,440KB formatted capacity is merely the result of a conventional format that writes 80 tracks on the magnetic media with 18 sectors per track. With the usurp tools, you can create diskettes that absorb 80 sectors and 24 tracks per sector, giving 1,920KB per floppy. Floppies having 1,680KB (80/21 sector/tracks per sector) are used regularly for LRP distributions and appear to absorb a reliable track record; 1,722KB (82/21), 1,743KB (83/21) and 1,760KB (80/22) likewise are reported to exist in use. I absorb found the 1,722KB format floppy to exist reliable enough for testing and absorb no problems to report so far.

    I absorb created and used large-format floppies of up to 1,920KB. Extremely large-format floppies watch to exist nonbootable, apparently as a result of a fight between PC BIOSes and the nonstandard sector size on the diskette. It has been reported that large-format floppies larger than 1,680KB can suffer from floppy disk hardware dependability problems. Windows NT and Windows 2000 are reported to absorb reliability problems writing to large-format floppies larger than 1,680KB.

    MS Windows 9x operating systems generally read gauge as well as large-format floppy diskettes with no configuration changes. In Linux systems, it is often necessary to mount the floppy disk with the redress format specified, i.e., /dev/fd0u1722, where fd0u1722 specifies floppy disk device 0 (fd0) and the u1722 specifies a 1,722KB format. The gauge floppy disk drive in Linux /dev/fd0 defaults to /dev/fd0u1440, the 1,440KB format.

    For creating and manipulating large-format floppies, consult the LRP Boot Disk HOWTO by Paul Batozech. You'll find this, and other useful articles, in the resources listed at leaf.sourceforge.net/devel/thc. For MS Windows, I absorb found Gilles Vollant's WinImage (www.winimage.com) to exist particularly useful and user friendly. However, it is in some ways more limited than the Linux tools, such as fdformat, mkdosfs and the more recent superformat application. The self-extracting 1,722KBps images for MS Windows discussed here were created using WinImage.

    How the LRP Distribution Loads

    Before you initiate to toil with LRP it is useful to note how the distribution works. If you examine the bootable diskette, you will observe a succession of files, including ldlinux.sys, linux, syslinux.cfg, root.lrp, etc.lrp, modules.lrp and local.lrp.

    The file ldlinux.sys is the bootstrap loader that loads the kernel (the file named linux) and initial root.lrp package into memory. The kernel starts and creates a RAM disk and extracts the root.lrp package. A RAM disk is a portion of recollection that is allocated as a partition. In other words, the kernel creates a space in recollection and treats it relish a read/write disk. The kernel then mounts the boot device specified in syslinux.cfg. The remaining .lrp packages on the boot disk are extracted as specified in syslinux.cfg and loaded to the RAM disk. The .lrp packages are merely gauge UNIX tarballs (tar-gzipped archives). Once the .lrp packages are installed in the directory tree on the RAM disk, the system begins a boot based on the gauge Linux rc file boot hierarchy.

    LRP is simply a stripped-down gauge Linux kernel with loadable modules and other software contained in sets of .lrp packages. LRP is truly Linux; generally, anything that will flee on a generic Linux distribution should flee off the LRP diskette. Often the barrier to extending LRP's applications and capabilities is the space constraint of a solitary diskette. If you require additional capabilities, for example, remote administration through ssh, a DNS server and so on, you will want to notice at multidiskette, CD-ROM or even the complete disk drive distributions of LRP that are available.

    Start up and Configuration of Router/Firewalling VPN

    Once the bootable floppy disk is created, earn confident the floppy is placed in the floppy disk drive of the machine on which you wish to flee the firewall/VPN. Ensure that the BIOS is configured to boot from a floppy disk. Upon booting the firewall/VPN, you will observe the LRP splash screen, messages from the Linux loader followed by a login prompt.

    If you absorb made it this far, congratulations! You absorb installed an LRP distribution successfully. Now you can start to configure the firewall properties of the LRP as outlined in the bundled documentation.

    Once any firewalling tweaks are completed, the VPN needs to exist configured. The bundled DUCLING documentation discusses the details for configuring a subnet-to-subnet setup. This involves configuring IPSec's authentication mode (/etc/ipsec.secrets), the IPSec network configuration (/etc/ipsec.conf) as well as the firewalling rules to allow access to ports 500 (UDP), 50 and 51 (TCP).

    Note that you requisite not necessarily require a static IP address in order to flee VPN links. A “roadwarrior” configuration is described in the next section, in which the one VPN client has an undetermined static IP address. I absorb flee VPNs between pairs of nodes with dynamically assigned IP addresses. The management of VPN nodes with DHCP-assigned IP addresses becomes tricky if both IP address assignments change frequently. The following section discusses a roadwarrior configuration using DUCLING and a Microsoft-based IPSec client.

    Interoperability Example

    This case shows an MS Windows 9x/2000 client point-to-site using SSH Communications Security Sentinel 1.1 (Public Beta 3). FreeS/WAN is interoperable with a wide reach of IPSec implementations. The ease of implementation and computability will vary depending on the product. Many IPSec products that support 3DES/MD5 encryption through IKE are interoperable with FreeS/WAN. However, I found that legally obtaining fully functional IPSec implementations that support strong encryption can exist arduous, especially if you live outside of the United States.

    Many vendors proffer only limited capabilities in their freely available IPSec implementations. For example, a product may only support infirm encryption (DES) or may circumscribe VPN capabilities to transport mode only. It is significant to distinguish between the two VPN modes that are offered through IPSec: transport mode and tunnel mode. Transport mode encrypts and authenticates traffic between two fixed discontinuance points. Tunnel mode is more useful for connecting subnets and allows tunneling through firewall and router parameters into different subnets. Basically, transport mode restricts traffic to point-to-point communication. Tunnel mode likewise allows point-to-site (point-to-subnet) or site-to-site communications. At least one vendor does not appear to allow its implementation of IPSec to flee over a connection using a static IP address.

    The SSH Communications Security Sentinel product (www.ipsec.com) does not appear to suffer from any of these problems, possibly due to the fact that the company is based outside of the US. I downloaded and tested the 30-day trial beta 3 release of Sentinel 1.1 and found it to exist very effortless to configure on a Windows 98 desktop PC. The Sentinel documentation provides configuration examples for interconnectivity with a FreeS/WAN VPN gateway.

    Here is a summary of a roadwarrior configuration that allows remote users with dynamically assigned IP addresses to connect transparently to a LAN behind a firewall. You will requisite to open ports 50, 51 (TCP) and port 500 (UDP) to the dynamic IP address or the ISP's DHCP address range. motif 1 shows the basic setup. You will requisite to edit /etc/network.conf on the DUCLING FreeS/WAN firewall (go into lrcfg, select 1), then 1) and set


    to disable the blocking of tunneled packets. The bundled documentation contains the detailed instructions on how to enact these tasks.

    Figure 1. A Roadwarrior-to-Site Configuration

    The contents of the FreeS/WAN ipsec.conf file are given in Listing 1. The corresponding ipsec.secrets file contains the entry PSK "Put your roadwarrior secret string here"

    where the phrase in quotes is a shared-secret string. The IP address denotes any IP address, so recollect to select a secure shared-secret string. The rightsubnet and rightnexthop parameters are left blank and imply that the connection is a point-to-subnet connection.

    Listing 1. The FreeS/WAN conn Listing for the Setup Shown in motif 1.

    To set up the Sentinel IPSec service:

  • Download SSH Sentinel from www.ipsec.com and install, following the instructions.

  • Go into the Sentinel Policy Manager (Figure 2).

    Figure 2. Sentinel Policy Manager

  • Choose the Key Management tab, Authentication Keys and select Add (Figure 3).

    Figure 3. Adding a fresh Key

  • Select Create a fresh preshared key then Next (Figure 4).

    Figure 4. Configuring Preshared Key

  • Type in your preshared key. It must exist identical to the shared-secret string you absorb inserted in /etc/ipsec.conf (without the quotes). (See motif 5.)

    Figure 5. Typing in Shared Secret

  • Press Finish.

  • On the main console of SSH Sentinel Policy Manager, in the Security Policy pane, select VPN connections®Add.

  • Enter in the IP/hostname of the remote VPN gateway; for their example, it is, and select the preshared surreptitious that you created in step 5 as the Authentication key (Figure 6).

    Figure 6. Entering Key and UP Information

  • Select 3DES encryption, Main Mode and MODP 1024 for IKE Mode and IKE Group, respectively. The Advanced pane generally can exist left with the defaults.

  • Set the IKE SA lifetime (i.e., the interval between rekeying) to the selfsame value as in the ipsec.conf file, typically 480 minutes (eight hours).

  • Save everything settings and try to ping an internal node behind the firewall (try the internal interface, 192.168.x.254). You should exist connected. Try running Sentinel's diagnostics to earn confident you are connected. I absorb found that Sentinel's diagnostic mode can hang the FreeS/WAN-Windows connections sometimes. If this happens, ebb to the FreeS/WAN gateway and enact a restart of IPSec and then bring up the various connections.

    Figure 7. The VPN Connection Properties Tab

    Once again, if you requisite to restart the connection, log in to the LRP box and type

    #/etc/initd.d/ipsec restart

    to restart the IPSec components.

    I likewise found in Windows 2000 Professional (but not Windows 98) that I had to add the routing manually to the shared subnet from the DOS console:

    route ADD MASK

    (refer to the documentation for the Microsoft route command).


    This article outlines the means to implement a firewalling VPN gateway from a solitary 3.5" floppy diskette. With a solitary floppy diskette, you should exist able to connect hosts and networks of various topologies securely using the Internet. The DUCLING distribution is a bare-bones distribution. Once you are convinced that a FreeS/WAN VPN can fulfill your needs, you can notice at either going to a more full-featured LRP distribution or even a full-blown Linux system, implementing such things as remote access (via the secure shell, ssh, for example) or a DNS server.

    Troubleshooting Resources

    Check Point and Nortel VPNs prove enterprise-worthy | killexams.com real questions and Pass4sure dumps

    For many companies, rolling out an IPSec client to road warriors and trusted commerce partners was once the only course to provide the secure access they needed. Now SSL VPNs are quickly gaining steam, poised to supplant cumbersome IPSec implementations.

    SSL VPNs provide easy, clientless access to corporate resources without requiring a beefy client on each remote PC. Remote users connect using their Web browser and absorb secure, managed access to Web applications, file shares, and the like.

    I reviewed two SSL VPN gateways from longtime security vendors: Check Point Software Technologies' Connectra 2.0 and Nortel's VPN Gateway 3050. Both systems are quite capable of handling an enterprise's remote-access needs, but each has its little, not-so-charming quirks, too.

    Check Point Connectra 2.0

    The Check Point Connectra Web security gateway should easily appropriate into your existing network infrastructure, especially if you already absorb Check Point products in place. It provides access to both Web and TCP/IP applications, adds an application firewall and malicious-code-detection engine, and offers improved integration with Check Point's SmartCenter management platform. It lacks a TCP/UDP (User Datagram Protocol) port-forwarding service, present in other SSL VPN gateways, but it circumvents that with its layer 3 tunnel.

    I installed the Connectra 2.0 without any problems. The underlying OS detected my hardware and installed itself in less than an hour. I logged in to the Connectra using Internet Explorer 6 (IE is the only supported browser for administration) and defined authentication servers and protected resources.

    The Connectra's list of authentication sources is not as extensive as it is for other vendors' SSL VPNs, but for most situations LDAP, energetic Directory via LDAP, RADIUS, local database, and digital certificates will suffice. I created a connection to energetic Directory for my users, but not without a minute effort. earn confident you know your complete LDAP log-in information. This allotment could spend a minute wizardry to earn the process more straightforward.

    By using Network Extender, Check Point's layer 3 service, I defined links to Web and file resources and to TCP/IP application access. Network Extender allows granular control over bidirectional TCP and UDP layer 3 tunneled traffic. Disappointingly, it is only available for IE users.

    Specifying Web resources and SMB file shares proved straightforward. However, accessing file shares requires Microsoft WebDAV. This delivers a Windows Explorer notice and feel, but, again, it limits you to IE.

    A unique feature in Connectra allows admins to create mail services for remote users. As Nortel does with its VPN Gateway 3050, Check Point includes templates for OWA (Outlook Web Access) and gauge SMTP, POP3, and IMAP to earn defining the resources quick and easy. I had no concern creating links to my OWA servers.

    Connectra focuses heavily on network and end-point security, putting in station services that protect the enterprise at the network and application level. The product advances application-level security by checking traffic for known worms, plus it inspects everything HTTP traffic through its Web Intelligence service. Additionally, Connectra allows administrators to implement some validation on the HTTP traffic, such as denying unsafe HTTP methods, but the list of available choices is vague and doesn't allow for any tweaking of the rules.

    I was, however, impressed with the Connectra's built-in application protection. Although it's basic, admins can select to avert cross-site scripting, SQL and command injection, and directory traversal. This protection is no match for an application firewall such as Imperva's  SecureSphere , but it's a step in the prerogative direction.

    Overall, end-point security is well done and manages host checks, browser cache policies, and personal firewall status. Through Check Point's Integrity Clientless Scan, Connectra will check the remote PC for potential risks such as malware, but this feature is -- you guessed it -- limited to IE users. This scan likewise looks for Check Point Integrity Firewall, but no other vendors' firewalls. Also, as with VPN Gateway 3050, there is no course to define specific processes or Registry entries to scan for.

    Connectra 2.0 warrants consideration, especially when compared with other enterprise remote-access solutions. It has everything of the core features, plus solid end-point security. I don't relish its ponderous reliance on IE, and I would relish to absorb more control over some security features, but it's silent a stable and capable system.

    Nortel VPN Gateway 3050

    Nortel's VPN Gateway 3050 appliance scales well and has highly configurable SSL parameters. It comes with everything of the SSL VPN services I've forward to expect in a gateway and does most other SSL VPN vendors one better by including IPSec VPN client support. TunnelGuard provides the end-point security and management piece via a download-on-demand Java applet, but it takes some time to salvage up and running. Also, integration with energetic Directory is a bit sketchy.

    I tested the 3050 by installing it in my test LAN, which was recently vacated by six other SSL VPN appliances. After setting IP addressing for my LAN through a local serial connection, I logged in with Firefox and finished the configuration using the administration UI. I found the UI nicely organized, but locating specific menu options was not as intuitive as it is with the Connectra.

    I created a yoke of test user accounts in the local user database and added energetic Directory as my source for user authentication. The 3050 comes with support for RADIUS, NTLM (NT LAN Manager), SiteMinder, LDAP, and energetic Directory via LDAP, but creating a connection to energetic Directory nearly stumped me. Similar to my relish with the Connectra, I had to ferret out LDAP syntax and enter it manually, but unique to Nortel is the requirement to likewise list the energetic Directory group and user-attribute mappings.

    Once in place, the LDAP/Active Directory authentication worked superbly and even allowed for the passing of expired energetic Directory user accounts for password remediation. As with other SSL VPN gateways, administrators can stack different authentication services with a predetermined precedence to allow for flexible user authentication. For example, a user might first exist checked against the local user database and, when no match is found, checked against the next authentication service -- RADIUS, for example.

    The 3050 offers noteworthy flexibility in how it provides remote access. Service providers can virtually slice up the 3050 into many discrete sites, each with its own authentication schemes and resource definitions. relish F5's Firepass, the 3050 comes with VLAN support and, when clustered, scales very well.

    Like the Connectra, the 3050 has solid browser-based support but goes on to ply both TCP and UDP apps via a download-on-demand Java applet. The 3050 likewise comes with canned definitions for Citrix, Telnet, and SSH; it likewise allows for endemic Outlook (fat client) connection across the Internet. Nortel provides RPC across SSL without requiring any changes to your Exchange server, much relish Exchange 2003's fresh RPC across HTTP service.

    Netdirect is the ActiveX-based complete tunnel for those who requisite a layer 3 connection. Although limited to Windows platforms, Netdirect does allow for complete bidirectional TCP/IP traffic and supports both split and complete tunneling. I relish that the virtual adapter removes itself quietly on disconnect so there are no lasting traces on the PC.

    Unlike the Connectra, admins running the 3050 absorb a huge amount of control over SSL implementation as well as HTTP-specific settings, which allow for granular control over items such as SSL Header rewrites, secure cookies, and image, script, document, and ICA (Independent Computing Architecture) caching. But missing is any kind of application firewall.

    End-point management and control are handled through Nortel's TunnelGuard service. A Java-based utility, TunnelGuard checks a remote PC for compliance, but only after the user authenticates. It will check for any disk content, running process, and digital certificates on files. Currently it will not discharge Registry, program-version, or date checks, which prevents the utility from looking for sound and up-to-date anti-virus programs. Although it's comprehensive, I found the TunnelGuard management overly complex.

    VPN Gateway 3050 is a noteworthy all-around performer that needs a minute toil on end-point security. I don't relish that it requires IE for its ponderous lifting, but the SSL control and IPSec client support alleviate earn up for these deficiencies.

    The Connectra will appropriate in well at shops invested in Check Point's products. Its strong integration with SmartCenter is a bonus. Nortel's 3050 scales well and comes with very granular security, and it's a noteworthy option for enterprises that absorb a ponderous IPSec installed foundation and want a graceful migration path to SSL. Both systems depend too much on IE, but overall, both are worthy security solutions.

    InfoWorld Scorecard

    Scalability (20.0%)

    Setup (10.0%)

    Security (35.0%)

    Interoperability (25.0%)

    Value (10.0%)

    Overall Score (100%)

    Nortel VPN Gateway 3050 9.0 7.0 9.0 7.0 8.0 8.2 Check Point Connectra 2.0 8.0 8.0 9.0 7.0 9.0 8.2

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