920-468 exam Dumps Source : Nortel VPN Router Rls.7.0 Advanced Configuration & Management
Test Code : 920-468
Test designation : Nortel VPN Router Rls.7.0 Advanced Configuration & Management
Vendor designation : Nortel
: 56 existent Questions
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EUC with HCI: Why It concerns
Nortel has released a patch for a vulnerability in its VPN routers that could both trigger them to automatically reboot or reside down unless a manual reset is completed.
security enterprise NTA monitor observed it discoved the denial of service (DoS) vulnerability in Nortel VPN Router items (up to now known as Nortel Contivity) whereas performing a VPN protection verify for a consumer. The company described the vulnerability as "severe ... as a result of a sole malformed IKE packet causes the VPN router to crash. besides it is not constantly feasible to wait away from the malformed packet from accomplishing the router."
NTA monitor suggested that the vulnerability is brought on by using sending an IPsec IKE packet with a malformed ISAKMP header. The organization stated that receipt of the packet caused a crash "every time this benevolent of malformed packet is distributed."
in line with the community, in assessments the affected router automatically rebooted about 80 p.c of the time, however required a manual reboot 20 p.c of the time. extra, the routers confirmed failed to log receipt of the packets, even when logging become set to optimum verbosity. The corporation speculated that this become the influence of the routers crashing before they may even log the packet.
additional, the neighborhood argued that "safety via obscurity" is a very sinful routine in this case:
"it's feasible for attackers to become aware of and fingerprint Nortel VPN routers the usage of [...] IKE fingerprinting suggestions," the neighborhood referred to in its document. "for this judgement clients may soundless no longer assume that their VPN router is invisible simply because it's now not posted within the DNS and isn't running any TCP features."
NTA stated that the situation influences Nortel VPN router models 1010, 1050, 1100, 600, 1600, 1700, 2600, 2700, 4500, 4600 and 5000.
Nortel consumers with a sound login on the enterprise's web site can entry the Nortel bulletin on the vulnerability and download a patch.
TSX : NTOTC Bulletin Board : NRTLQ
may besides 20, 2009 06:00 ET
Capital and Operational discounts Enabled by the exhaust of current products of statistics Portfolio
TORONTO, ONTARIO--(Marketwire - can besides 20, 2009) - Nortel(1) (TSX:NT)(OTCBB:NRTLQ) today delivered current information products which are quicker, greater secure and cheaper than competing options, and are specially designed to pilot the needs of ultra-modern real-time enterprise purposes.
Nortel's several portfolio of recent items permits firms to construct networks which are more efficient and advantageous. The newest advancements in expertise and techniques, energy-efficient hardware, and imaginitive aspects total feed into the introduction of a network that minimizes capital outfit and charges, optimizes total attainable supplies, and reduces operational affliction and rate while presenting the basis for unified communications.
"Nortel's relentless accommodate to create innovation on total fronts - in expertise, in products, in power efficiency and with their shoppers is why they proceed to set up and suggest their voice and facts solutions. Nortel provided us the architecture, the administration and the fiscal mannequin to achieve resiliency, ease-of-use and value effectiveness," spoke of Pierre-Eric Belzile, executive director, tips and communique expertise, Montreal Canadiens(2).
"Our dedication to their valued clientele is unwavering. they are carrying on with to innovate and deliver the solutions that increase the can suffuse structure, functionality and reliability of enterprise networks," famed Joel Hackney, president, enterprise solutions, Nortel. "We continue to live at the leading edge of solving clients' complications and assembly their wants with solutions constructed for velocity, reliability and price. To that conclusion, we're introducing a number of current products purpose-built to allay the course forward for communications."
New solutions accommodate client Momentum
built for precise-time purposes, Nortel's records portfolio allows businesses to simplify and increase the tempo of their operations. in response to Nortel's information foundational principles of resiliency, efficiency, efficiency, safety, and multivendor options, the enterprise unveiled current products to streamline operations to assist supply businesses a aggressive potential. These build on Nortel's mode of delivering innovation into its currently refreshed facts portfolio - third-party proven to supply 20 times the performance, seven instances the resiliency at up to half the entire suffuse of ownership(3) of competing solutions.
The virtual features Platform 9000 (VSP 9000) is Nortel's newest excessive-efficiency, subsequent-era, core records community answer. offering twice the performance of competing solutions(four), it is aim-developed for mission-essential campus networks and records centers that require extremely-reliability, flexibility, and virtual community functions. The VSP 9000 enables corporations to realize the efficiencies of a simplified infrastructure that may virtualize elements of the community to wholly and successfully consequence the most of servers as smartly as the network capabilities, cutting back the stress on personnel and substances. (Please note ally announcement, Nortel Unveils subsequent-Gen Core commercial enterprise community answer).
Augmenting the company's line of comfortable Routers is the Nortel comfy Router 2330, which offers built-in routing, WAN, safety and voice gateway services for minuscule and mid-measurement branches. the brand new, budget friendly 2330 platform, along with Nortel's relaxed Router 4134, besides helps survivable SIP features, vital for IP telephony deployments where voice communications ought to live ensured within the case of IP WAN or voice designation server disasters.
"As a world, leading-edge manufacturer, the reliability of their community is crucial to their everyday operations. Nortel has served us well to this point with their portfolio and we're excited concerning the possibilities of Nortel's secure Router 2330. They note this platform giving us current deployment options with its least expensive modular design and built-in voice capabilities," referred to Steven Lee, network engineer, countrywide Semiconductor.
Unified Communications administration (UCM) is a brand current Nortel reply that consolidates management, configuration, operations and deployment of UC solutions to deliver more centralized, built-in control of voice and statistics infrastructure. The UCM reply centralizes management of heterogeneous network assets to simplify community operations, which effects in reduce prices and a greater constructive unified communications system.
Kevin Harshaw, senior director, Olympic Operations for Bell explained the magnitude of the UCM portfolio: "Given the captious nature of working the Vancouver 2010 Olympic and Paralympic iciness video games(2), Bell ought to live able to readily control and proactively reply to issues earlier than they own an consequence on community efficiency. Nortel's Visualization efficiency and fault supervisor, with its configurable polling, entice reporting and notification aspects, allows us to Do exactly that. now not most efficient does it deliver a centralized, UC management solution that helps find and connect infrastructure machine and end-nodes during the network, however additionally helps us slice back working charges. Its potent management features consequence it a key point in enabling Bell to carry flawless community insurance for the video games."
Nortel's Unwired industry vision centers across the current instant local district network 8100 (WLAN 8100) sequence of routers. This reply will provide seamless integration of wired and unwired network elements to allay create a greater seamless communications undergo for IT managers and terminate clients. in keeping with the 802.11n protocol, the solution combines the latest industry requisites with a very unified architecture - leading to lessen total can charge, greater potential, performance and coverage - in addition to a simplified infrastructure that can provide relaxed, widespread mobility.
Carol Barber is government director and chief expertise officer for the Western long island Regional tips core, an organization that along side the Boards of Cooperative education services, serves virtually a hundred college districts in vast apple state and helps more than 95,000 computer systems: "The Western manhattan Regional assistance middle has been a Nortel WLAN client for a long time, and we're enthusiastic about their next-generation WLAN 8100 answer. They draw to tribulation this enjoyable current expertise in their community later this 12 months," Barber observed. "When Nortel first released its imaginative and prescient of the Unwired enterprise, it really hit home with us. Their approach for actual wired and instant integration resonates with their view of the spot the market is heading."
Nortel's recently launched Ethernet Routing switch 5600 is the primary reply to attain terabit speeds for stackable switches. The switches present extra bandwidth ability, more suitable performance and expanded resiliency than aggressive solutions. elevated port density and superior stacking capabilities besides add to the cost-proposition, as fewer switches are required.
in addition, the industry recently added the Nortel comfy Router 8000 sequence to deliver feature-wealthy IP routing, bendy vast-area networking and provider-type reliability. Designed for commercial enterprise facts centers, and core and head-end routing applications, this reply grants the excessive-performance, resiliency and protection that organizations requisite to meet growing bandwidth calls for.
Demonstrating the company's management in finished community access security options, Nortel besides these days launched its identification Engines portfolio. providing network identification management, the id Engines solution augments Nortel's present network access control (NAC) expertise by using adding a current set of capabilities including business-wide 802.1X help, reporting, id-mindful networking and centralized coverage resolution across LAN, WLAN and VPN. identity-primarily based network entry maneuver restricts entry to the community, features and applications in response to the person, time of day, health of the gadget, community entry components and different variables in an automatic, centralized environment.
"Complexity fees companies greater than connected expenses, it additionally robs them of productiveness, effectiveness and the skill to meet their enterprise case," said Hackney. "Nortel has been at the forefront in providing unified communications options, so it's totally applicable that they would continue to innovate to carry the solutions that operate with enhanced efficiency, reliability and control than different options."
Nortel is a diagnosed chief in supplying communications capabilities that consequence the covenant of company Made simple a fact for their valued clientele. Their next-generation technologies, for both service company and commercial enterprise networks, uphold multimedia and business-essential applications. Nortel's applied sciences are designed to uphold dispose of latest limitations to efficiency, hasten and performance by course of simplifying networks and connecting people to the tips they need, after they want it. Nortel does enterprise in additional than one hundred fifty nations total over the world. For more counsel, search counsel from Nortel on the internet at www.nortel.com. For the latest Nortel information, search counsel from www.nortel.com/information.
certain statements during this press unencumber might besides comprise words corresponding to "could", "expects", "might also", "anticipates", "believes", "intends", "estimates", "aims", "envisions", "seeks" and other identical language and are considered ahead-looking statements or assistance under apropos securities legislation. These statements are in line with Nortel's latest expectations, estimates, forecasts and projections concerning the operating atmosphere, economies and markets during which Nortel operates. These statements are sphere to necessary assumptions, risks and uncertainties, which are difficult to foretell and the actual consequence could live materially diverse from these meditated in ahead-searching statements. For more information with recognize to inescapable of these and different factors, note Nortel's Annual record on Form10-okay, Quarterly reports on benevolent 10-Q and different securities filings with the SEC. except otherwise required by apropos securities legal guidelines, Nortel disclaims any protest or duty to replace or revise any forward-searching statements, whether on account of current counsel, future activities or in any other case.
(1)Nortel, the Nortel brand and the Globemark are trademarks of Nortel Networks.
(2)here's a 3rd birthday party hyperlink as described in their web linking practices.
(three)The Tolly group report number 208298, July 2008, said the outcomes of a power consumption evaluation of six Nortel converged facts network items together with mammoth and medium core and wiring closet Ethernet Routing Switches (ERS), commercial enterprise department office routers, and IP telephones in comparison to an identical Cisco products on the basis of vigour consumption and warmth dissipation, and five-yr operational cost. note besides The Tolly community record number 208275, January 2008, and data-Tech analysis group document (January 30, 2008).
(four)The performance comparison is based upon Nortel's model VSP 9000 product which achieves throughput of 970 Mpps via ten output slots, in comparison to Cisco's model 7010 product which achieves throughput of 480 Mpps through eight output slots, as pronounced on the product facts sheet on Cisco's publicly obtainable web page. "The performance assessment is based upon Nortel's mannequin VSP 9000 product which achieves throughput of 1,700 Mpps through ten output slots per chassis working in community excessive availability mode the usage of Nortel's swap Clustering characteristic for both Layer 2 and/or Layer 3 traffic flows, in comparison to Juniper's mannequin EX 8208 product in towering availability mode which achieves throughput of 970 Mpps and does not own a function corresponding to Nortel's swap Clustering, but fairly depends upon Layer 3 protocols such as OSPF with ECMP to load balance simplest Layer three IP traffic flows, as suggested on the product statistics sheet on Juniper's publicly obtainable site.
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Wireless is another district to consider. Many routers, particularly home-based solutions, present integrated routers based on wireless solutions, though I would personally recommend a divorce access point for your industry when doing wireless -- one which is optimized for security. Though it clearly works well for home exhaust (and I exhaust one myself at home), I would certainly not purchase a Linksys router/switch/wireless access point for my business.
Support: Some things to considerWhen upgrading to a current router, you must consequence certain that you understand the character of uphold that you will live getting from your vendor. If you try to recede with a low-priced router, it may not own the technical staff to allay you deal with the problems that will develop. One must besides deem the platforms that WAN engineers typically use, as it will live easier to uphold your environment with industry-standard products that are fully utilized by the majority of companies, minuscule and large.For both the enterprise and SMB, it is necessary to pick a manufacturer that cares enough about their products to educate engineers who are liable for deploying their solutions (and not just box pushers). For example, Cisco network engineers typically will try to accumulate a CCNA or (if they are really amazing) CCIE certification from Cisco, which showcases their skill sets to employers. Nortel offers an NCA at their highest level, which represents a highly advanced smooth of technical design and analytical expertise for complicated Nortel Networks solutions, besides widely acknowledged throughout the industry and regarded a symbol of excellence. Nortel has the greatest telephony experience, having grown up in that world, so I would seriously deem using their infrastructure if you are looking for tenacious VOIP integration. 3Com besides offers certification in their technologies. Their router cert is the 3Com Certified WAN Specialist, which demonstrates skills in designing and implementing 3Com WAN solutions, working with 3Com routers and protocols including OSPF and BGP4.
Product lines: What to expectLet's sight at what a few of the major router vendors present from their product lines.
For SMBs, Cisco has the 1800 Series, which provides WLAN capabilities along with advanced with advanced security services and management features such as hardware encryption acceleration, IPSec VPN (AES, 3DES, DES), firewall protection, inline intrusion prevention, Network Admission Control, and URL filtering uphold to allow their smaller customers to implement resilient, scaleable solutions. Cisco helps its clients to optimize networks via a attain of products and services, which they present through their dealer channel. Through their Cisco Registered ally program, they ensure that their partners are certified annually and own the information and information at their disposal to fully uphold their customers. 3Com and Nortel besides present similar services. In addition to their SMB routers, Cisco besides offers enterprise-wide models, including the 7600 series, their high-end model which offers integrated, high-density Ethernet switching, carrier-class IP/MPLS routing, and 10-Gbps interfaces.
3Com besides has a tenacious product line, and I am particularly impressed with their 6000 train model, as it has every feature you can possibly arbitrator of, including fault tolerance and advanced traffic management and control features. I own deployed 3Com-only switch and routing infrastructures with much success in the past.
On the Nortel front, they own teamed with Microsoft to uphold Microsoft's Network Access Protection (NAP), an extensible standards-based technology that allows users to more securely access their corporate networks and reduce the complexity of network access for IT administrators. They are besides working together with other industry-leading security companies to develop industry standards, network designs and products intended to secure captious information by protecting the communications infrastructure as well as user computing devices fancy desktop and laptop computers. This partnership is important, because despite the fact that many WAN folks disdain Microsoft, those people will soundless requisite to deal with Microsoft on the PC client side.
Regarding Nortel's product line, I'm impressed with the Nortel Multiprotocol Router 5430, which is being marketed to remote offices that own outgrown smaller fork office routers. It can uphold concurrent, compute-intensive applications such as IP quality of Service, IP multicast, compression and VPNs. It besides has uphold for multiple WAN technologies -- including ATM T1/E1 and T3/E3, frame relay, PPP and ISDN.
Cisco has its own propriety product called the Cisco Systems' Network Admission Control (NAC), which will besides carefully dissect any PC that wants to attach to your network, to check for the presence and status of antivirus and personal firewall software and report on the configuration of the machine. I feel Nortel has the edge here, because most desktop clients are Microsoft, and it is to their edge that unlike Cisco, they own chosen to ally with them, and not develop their own proprietary standards.
In conclusion, I will reiterate that when looking to purchase current routers for the enterprise, one must sight for VPN capability, mulit-protocal support, integration with other networks, security enhancements (I.E (3-DES encryption) and direct vendor support. Though I would not hesitate to charge out alternate solutions, I prefer industry-standard products for the enterprise.Kenneth Milberg is systems consultant with his own independent consulting firm, Unix-Linux Solutions. He has fifteen years of undergo with Unix and Linux systems, as well as broad technical and functional undergo with AIX, HP, SCO, Linux and Solaris. Milberg holds certifications with IBM (IBM Certified Systems Expert -- eServer p5 and pSeries Enterprise Technical uphold AIX 5L V5.3 & IBM Certified Specialist –HACMP), SUN (SCNA,SCSA), HP (HP Certified –HP-UX administration) Cisco (CCNA) and Oracle (OCP-DBO).
Consider the strengths and weaknesses of IPSec and SSL before picking the technology that's birthright for your virtual private network
The saga of the Labor Department's attempt to outfit Mine Safety and Health Administration employees with remote access through virtual private networks serves as a minihistory of the technology. In 2003, the agency tried VPNs based on the most favorite technology of the time: Internet Protocol Security, which essentially provides a direct pipe to the agency network. But administrators got bogged down in tech support. IPSec requires installing a tricky-to-configure program on every remote machine. Plus, firewall and other network conflicts can live necessary allay desk nightmares.
The following year, the agency moved to Secure Sockets Layer VPNs. Touted as IPSec's heir apparent, SSL VPNs employ Web browser technology that requires slight or no client software. The agency installed SSL VPN appliances from Juniper Networks and by spring 2005 had 2,200 employees using remote access'and a huge drop in service calls.
Many agencies, if they own not already done so, will soon mug the issue of what technology they should exhaust to connect remote workers. While the propel for more telecommuting by federal employees is a major driver of VPN demand, experts besides cite tenacious interest from agencies implementing catastrophe recovery plans.
'A lot of governments feel they requisite to own fail-safes in spot so that if up to 75 percent of the employees own to toil at home, they will live able to maneuver that spike,' said Robert Whiteley, senior analyst at Forrester Research.
In fact, VPN sales are skyrocketing across total industries. According to International Data Corp., a market research firm, worldwide sales of just $75 million in 2003 nearly tripled to $200 million the following year and were estimated to nigh out 2005 at $325 million.
Pros and cons
In a nutshell, a VPN is a course to link network nodes over the public Internet while keeping the connection private, using encryption and other security techniques.
Here's the captious dissimilarity between the two main technologies: IPSec essentially opens a fully functioning pipeline directly to the internal LAN, while SSL provides access to a select group of applications.
'IPSec is fancy an extension of your LAN,' Whiteley said. 'It's a Layer 3 pipe, and pretty much every application will rush over it. SSL sits above that, in Layer 4 or 5, so it doesn't necessarily toil with total applications.' Still, SSL vendors own institute ways around these limitations, Whiteley said.
In practice, the dissimilarity in client-side software means IPSec may live preferable for securely linking two computers in different locations, called a site-to-site VPN. IPSec proponents besides hiss it is superior for transferring great files.
With its simple setup, SSL is generally better for quickly activating great numbers of remote users, even on an ad hoc basis.
'IPSec VPNs are the limpid selection when you own two dedicated endpoints,' said Tim Simmons, product marketing manager at Citrix Systems, a maker of SSL VPN appliances and remote-access servers for the Defense Department and other great agencies. 'SSL VPNs really exceed at the connections to multiple unknown clients.' Several SSL-oriented vendors hiss they invested in the technology precisely to allay organizations avoid problems they had getting IPSec to traverse network address translation and firewalls.
With telework, industry continuity top-of-mind, agencies will sight for secure remote access
Michael BechettiThe saga of the Labor Department's attempt to outfit Mine Safety and Health Administration employees with remote access via virtual private networks serves as a mini-history of the technology.
In 2003, the agency tried VPNs based on the most favorite technology of the time: Internet protocol security, which essentially provides a direct pipe to the agency network.
But administrators got bogged down in tech support. Internet protocol security requires installing a hard-to-configure program on every remote machine. Plus, firewall and other network conflicts can live necessary help-desk nightmares.
The following year, the agency moved to secure sockets layer VPNs. Touted as Internet protocol security's heir apparent, secure socket layer VPNs exhaust Web browser technology that requires slight or no client software.
The agency installed SSL VPN appliances from Juniper Networks Inc. of Sunnyvale, Calif., and by spring 2005 had 2,200 employees using remote access ? and enjoyed a huge drop in service calls.
Many agencies, if they own not already done so, soon will mug the issue of what technology they should exhaust to connect remote workers, and they'll live looking to integrators to allay consequence a decision. While the propel for more telecommuting by federal employees is a major driver of VPN demand, experts besides famed a tenacious interest from agencies implementing disaster-recovery plans.
"A lot of governments feel they requisite to own fail-safes in place, so that if up to 75 percent of the employees own to toil at home, they will live able to maneuver that spike," said Robert Whiteley, senior analyst at Forrester Research Inc. of Cambridge, Mass.
VPN sales are skyrocketing across total industries. According to market research firm International Data Corp. of Framingham, Mass., worldwide sales tripled from $75 million in 2003 to $200 million the following year. IDG estimated sales would nigh out 2005 at $325 million.
A VPN links network nodes over the public Internet while keeping the connection private through encryption and other security techniques. Here's the captious dissimilarity between the two main technologies: Internet protocol security opens a fully functioning pipeline directly to the internal LAN, and secure socket layer provides access to a select group of applications.
Internet protocol security is fancy an extension of a LAN, Whiteley said.
"It's a layer 3 pipe, and pretty much every application will rush over it. SSL sits above that in layer 4 or 5, so it doesn't necessarily toil with total applications." But SSL vendors own institute ways around these limitations, he said.
In practice, the dissimilarity in client-side software means Internet protocol security may live preferable for a site-to-site VPN, the secure linking of two computers in different locations. Internet protocol security proponents besides said it is superior for transferring great files.
With its simple setup, SSL generally is better for quickly activating great numbers of remote users, even on an ad hoc basis.
"Internet protocol security VPNs are the limpid selection when you own two dedicated endpoints," said Tim Simmons, product marketing manager at Santa Barbara, Calif.-based Citrix Systems Inc., a maker of SSL VPN appliances and remote-access servers for the Defense Department and other great agencies. "SSL VPNs really exceed at the connections to multiple unknown clients."
Several SSL-oriented vendors said they invested in the technology precisely to allay organizations avoid the problems they had getting Internet protocol security to traverse network-address translation routers and firewalls.
Don't I know you?
Internet protocol security and SSL soon may start to sight more alike. It once was safe to hiss that SSL required no special client software, but SSL VPN vendors own been adding features that require the remote device to download minuscule lively X or Java applets ? and sometimes they exhaust Internet protocol security for the download.
"Everybody is affecting toward complete VPN clients," Simmons said. "SSL VPNs are starting to sight a lot fancy Internet protocol security VPNs."
"The problem is not having a client on the endpoint, per se, it's how Do you accumulate that client to the endpoint?" said Niv Hanigal, product manager for Juniper.
Hanigal said users of Juniper VPNs don't own to worry about software. "They recede to the Web site to log in, and in the background, something's being downloaded," he said. "It's usually only 500K."
It's not always an either-or selection between Internet protocol security and SSL. A few vendors, among them Check Point Technologies Inc. of Redwood City, Calif., Cisco Systems Inc. and Nortel Networks Corp. of Brampton, Ontario, present hybrids that give remote users more connection choices.
Some SSL vendors depend on Internet protocol security to present client-server access or to string SSL appliances together. And several companies present different versions of VPN to meet agencies' unique requirements.
All VPN products uphold a slew of government-endorsed encryption schemes, such as advanced encryption standard and triple data encryption standard.But the products that meet the most stringent standards recede through testing overseen by the National Institute of Standards and Technology to achieve certification for Federal Information Processing standard 140-2. A few besides are certified under Common Criteria encryption and authentication testing by the National Information Assurance Program, a NIST partnership with the National Security Agency.
As a complete network connection, Internet protocol security is more open to exploitation by hackers, especially through underprotected remote machines, according to John Girard, an analyst for Gartner Inc. of Stamford, Conn., and author of a 2005 analysis of the competing technologies.
Because Internet protocol security doesn't accommodate tenacious authentication, it is accessible via a simple user designation and password, which increases the haphazard of break-ins, Girard said.
But SSL is not without dangers. Thanks to widespread deployment, the total risk from the number of unmanaged PCs is greater. It's an feeling shared by Sonny Gutierrez, LAN/WAN security specialist at CDW Government Inc. of Vernon Hills, Ill., which sells both types of VPN products.
"You can sleep light at night knowing you're running Internet protocol security tunnels instead of SSL," Gutierrez said. "Internet protocol security technology is basically built into every firewall."
Organizations should establish policies to restrict SSL VPN use, Girard said. Products geared to great enterprises, such as those from Aventail Inc. and F5 Networks Inc., both of Seattle, and Juniper, enhance security with administrative software.
"We allow the administrator to control specific applications on a particular user's device," said Chris Witeck, Aventail's director of product management. "You're not really authorizing a user to access your network, you're letting them access specific resources."
Enterprise class VPN products besides perform endpoint analysis, besides called integrity checking, which tests the remote client for firewalls, anti-virus programs, the latest patches and other requirements specified in an agency's security policy.
Such VPNs can confine access to specified applications or plod the apps to a quarantined LAN. As an SSL VPN feature, this is useful especially for employees who access VPNs from shared machines, such as airport kiosks and public library terminals. In such situations, SSL VPNs may default to the most basic capabilities supportable in a browser, such as checking e-mail stored on an agency server or browsing the Web.
The more advanced endpoint analysis programs will automatically shut down a VPN session if they detect, for example, that the user has turned off the anti-virus program.
VPN logins are besides a apt course to beef up security for employees accessing the wired LAN from inside. "Since the perimeter is going away, you own to sight at access control not just for people coming in, but besides contractors and partners who are sitting on the inside," said Sanjay Uppal, executive vice president of product management at Caymas Systems Inc., San Jose, Calif. total applications could live enabled through a public-key infrastructure, "but that is going to live prohibitively expensive," he said.
Most VPN products are sold as appliances: thin network boxes connected via Ethernet ports. Some promote as upgrade boards that appropriate inside routers and switches. VPN boxes can sit either in a network's demilitarized zone behind the firewall as an extra measure of security, or outside the demilitarized zone.
The key feature to sight for is the maximum number of concurrent users, which is the best measure of scalability. Small-office systems top out at a few dozen; enterprise systems can attain several thousand.
To avert failures, some of the highest-capacity appliances add reliability features, such as redundant, hot-swappable drives and power supplies. They besides can live clustered to expand capacity and better performance as demand increases, but this can require additional load-balancing hardware.
Get your guard up
Intrusion detection devices and security information management technology,if not already present, can allay guard against attacks coming through the VPN. Many of these products promote with built-in VPNs.
An alternative to hybrid devices is for integrators and their customers could amalgamate and match Internet protocol security and SSL devices in the selfsame network, linking their VPNs.
"Crypto is crypto," said Charles Kolodgy, an IDC research director who worked in defense procurement. "It's really just being able to create an SSL tunnel to an Internet protocol security tunnel."
Software is the other option. Cranite Systems Inc. of Los Gatos, Calif., often pairs its Safe Connect proprietary software-based VPN with its FIPS 140-2-certified WirelessWall wireless security software, said Mike Coop, vice president for consulting engineering. "It prevents the Windows stack from being attacked externally," he said.
Blue Coat Systems Inc. of Sunnyvale, Calif., and PortWise Inc. of Mountain View, Calif., besides sell software VPN and other remote-access solutions.Software VPNs can drain server performance, but they present the greatest platform flexibility.
"The judgement you recede to software is if you want to exhaust your own hardware model," said Zeus Kerravala, vice president of enterprise research at market research firm Yankee Group Inc. of Boston.
Of total the options, appliances are the most expensive. Caymas Systems Inc. of San Jose, Calif., for example, charges $15,000 to $55,000 for its most favorite models for government, followed by add-in cards, then software, Forrester's Whiteley said.
Many agencies might live interested in a limited pilot or deployment before rolling out nationwide, CDW-G's Gutierrez said. Sometimes, as in the case of the Labor Department, tribulation and mistake helps illustrate the differences between the leading VPN technologies and leads your customers to the one that works best for them.
David Essex is a freelance technology writer in Antrim, N.H.
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