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Test Number : 920-257
Test cognomen : Nortel Secure Router Rls.3.0 Configuration Management
Vendor cognomen : Nortel
: 65 Dumps Questions

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Nortel Secure Router Rls.3.0 Configuration Management certification

Flooded container for IPSec-primarily based VPNs aids clients | 920-257 Dumps and existent exam Questions with VCE rehearse Test

whereas security vendors will promote you wares for any analytic layer and perfect viable places on your corporate network, IP protection-based mostly VPN gateways hold emerged because the most habitual category of product for constructing relaxed, website-to-site connections.

In their evaluation of 13 products during this market, they looked at the habitual manageability, efficiency and enterprise-concentrated characteristic standards, but they additionally delivered a brand new succession of interoperability tests to the combine.

In all, it was an astonishingly shut race. no person product stood out because the winner across perfect classes. This supply-and-take is reflected in their scorecard, the status greater than half the items are within a point of every different in the final tally. because of the extraordinarily shut scoring, they are usually not awarding a Blue Ribbon Award for this spy at various.

as a result of ambiguities in the IPSec habitual specification, not every vendor’s product will toil with every other supplier’s apparatus – even if every could hold a “appropriate” protocol implementation. That makes interoperability one of the vital most suitable challenges for VPN carriers.

We installation a hypothetical security coverage for a big, multisite community and evaluated how neatly each VPN product might sound into that community. With dissimilar facts centres and department offices with switches, routers and firewalls, their test bed was designed to resemble a common commercial enterprise information capabilities network. They confirmed interoperability of each and every product in opposition t each other VPN product, each in constructing initial comfy connections and in holding long-time term operation over a be counted of days. above all, they rated how every product worked with the others, labored with their certificate authority and with typical VPN client software, and the passage well each and every dealt with distinctive VPN authentication strategies.

an necessary a fragment of their evaluation became making items toil in a replete mesh. while essentially each VPN provider can accomplish bake-off vogue interoperability (the status they efficaciously negotiate a protection affiliation with one different dealer), they wanted to peer what community authorities can be faced with trying to pin collectively a existent multivendor network securely.

Our desirable interoperability class score went to comfortable Computing’s Sidewinder. right behind Sidewinder had been items from Avaya Inc., investigate ingredient utility technologies Inc., Cisco methods Inc., Microsoft Corp., Nortel Networks Corp. and Nokia Corp.

despite the fact the purpose ratings in line with their predefined comparison criteria set aside Cisco well-nigh on the true, they discovered extreme restrictions in its implementation. Cisco has been both saddled and blessed with its command-line configuration interface. whereas some network managers adore it, VPN designers will learn it under comforting. To back VPN configuration manageable inside the command line atmosphere, Cisco enables for only a unique internet Key alternate (IKE) policy per gadget. while that worked pleasant for their check (we desired a unique corporate policy), it wouldn’t toil neatly in an ambiance where IKE coverage diverse throughout websites. definitely, after they brought the SafeNet customer into their interoperability examine, they had been pressured to burst their Cisco pictures configuration: it might toil with the coverage they selected, or with the SafeNet customer, however not both on the identical time.

We used digital certificates issued by means of an Entrust public-key infrastructure (PKI) server for site-to-web site authentication and institute out a major variability in how the VPNs beneath check interacted with this PKI. Unauthorized entry to company networks is a large issue, and one that VPNs can aid to solve.

Sidewinder, Nortel’s Contivity 1600 and check element’s VPN-1 perfect offered decent proof that they had been in manage of who became coming into their community and what elements they'd entry to. perfect three products let us specify in as itsy-bitsy or as plenty detail precisely what types of certificates were vital to come by into their network. In distinction, Lucent’s access aspect a thousand and Cisco’s graphics 525 and IOS (Cisco entered both IOS on an optimized 7140 VPN Router platform with hardware acceleration and images 525 as website-to-web site items with separate capabilities and design goals) had a greater relaxed view of access control: when you obtained a certificates from the PKI, you hold been free to obtain any variety of VPN connection you wanted. This could be a killer in an extranet atmosphere, where not everybody is sharing the equal PKI and the status you bought your digital certificate is commonly just as censorious as what the certificate says.

Hewlett-Packard’s VPN Server equipment, RapidStream’s 2000, RedCreek’s Ravlin 7160 and WatchGuard’s FireBox III 4500 perfect failed their certificates interoperability examine. within the case of RedCreek and WatchGuard, neither correctly helps external certificates for site-to-web page authentication.

Microsoft’s home windows 2000 Server with its built-in VPN service and Lucent’s access factor supported certificates, but had challenge speakme to different certificates-assisting products. for instance, with Lucent’s access element, they needed to drop again to preshared secrets (a extra compatible however much less fascinating authentication gadget) when speaking to Avaya and Nokia. moreover, the Lucent product failed when speaking to Cisco’s pix with their favored policy.

HP too had issues regarding extraordinary configuration necessities in its IPSec implementation. HP both desires to perfect the time initiate the IPSec safety association, or by no means initiate the security affiliation. In web page-to-website networks, here's infrequently the style things work. thus, they had a tough time maintaining HP safety associations, because of collisions when changing keys.

WatchGuard and RapidStream additionally had terrible interoperability consequences. In WatchGuard’s case, its unchangeable default protection policy became insecure because it uses facts Encryption medium (instead of Triple-DES) encryption and Diffie-Hellman group 1, so they had to obtain a unique case configuration in perfect different items to match the WatchGuard inflexibility. RapidStream 2000 gave us incompatible outcomes, every now and then accepting safety associations and then failing to mosey traffic, occasionally working completely.

enterprise Manageability

As VPNs mosey out of pilot mode into implementation, configuration and administration of dozens and even lots of of VPN devices turns into an vast subject. The simplest three products they validated that hold GUIs sound for multisite, multivendor VPN management had been Avaya, examine ingredient and Nokia. They took under consideration how these outfit managed seller-specific apparatus and how smartly every assisted in their interoperability situations.

Avaya and Nokia rose to the precise of the trade configuration stack right away. each management outfit expend elementary constructing blocks to define VPN community topology.

We created, modified and managed multivendor VPN configurations conveniently with these tools. Nokia’s VPN coverage supervisor GUI permits you to build complicated topologies: combinations of hub-and-spoke; mesh; hyperlinks between both; and individual tunnels between any two systems.

Avaya’s GUI offers less topological energy, however has a far better returned conclusion. constructed on desirable of a light-weight listing entry Protocol server, this product lets multiple network managers view, edit and propel changes to a large network from varied websites. Avaya’s VPN supervisor GUI too has a developed-in client deployment and management implement for remote access VPNs. Nortel’s Contivity 1600 has a in a similar fashion potent device inbuilt, but the scope doesn't encompass multiple VPN protection gateway.

We evaluated examine factor’s these days released version of VPN-1 and were joyful to peer that the trade has approach a long means when it comes to VPN configurability and administration given that they checked out its V4.1 GUI past this year. investigate factor’s policy Editor GUI can now ply a bigger orbit of interoperability scenarios. besides the fact that children they tracked down just a few bugs within the new software, their current impression is that examine point is focusing more on massive VPNs. The examine factor GUI can without vicissitude generate meshed VPN topologies – a significant improvement from the V4.1 GUI, which tightly confined a VPN manager’s flexibility in determining operating parameters.

assess point’s management device too makes it feasible for integration of firewall rules and VPN settings. besides the fact that children determine aspect’s product doesn't back the finished array of protocols and lines that Lucent’s access ingredient does – which allows you to stack firewalls and VPN tunnels in any configuration you’d ever want – it handles 90 per cent or extra of the configurations most trade managers would dream up. The capability to categorical firewall filtering and VPN tunnelling in the equal rule is a vital aspect in merging VPN and firewall coverage.

a number of of the VPN administration tools were no longer very helpful in their interoperability quest. Nortel’s famed Optivity device is first rate for doing issues to dissimilar Contivity containers while not having to touch every one, however doesn’t truly accomplish anything for web page-to-site VPN configuration, even the status best Nortel methods are included. here is ill-fated as a result of Nortel’s aspect management (by passage of a local web server on the Contivity gadget) is the most efficient gadget management device of any product they evaluated. If Nortel might extend that administration to assorted programs, it could hold the knock- down winner during this class.

Lucent’s optional QVPN Builder GUI went the distance when it comes to managing a community of VPN devices as a unique unit, but had a vital flaw: It become not designed to hold anything else however Lucent access points within the network. because of this, they fell returned to Lucent’s command-line interface (CLI) for configuration. unfortunately which you could’t expend both the QVPN Builder and the CLI; you must opt for one. HP’s management device for its VPN Server outfit has an identical limit: It has some primitive capabilities to apply a unique coverage to multiple programs however doesn't hold any approach to combine non-HP items into the configuration. WatchGuard’s optional VPN manager software leaves network managers in much the equal boat. the want of firewall integration of the VPN configuration too left us disappointed as a result of WatchGuard’s firewall configuration is so fundamental and intuitive.

Microsoft’s VPN administration is removed from fundamental and intuitive. although it is viable to create a unique IPSec policy that could be utilized to numerous methods – provided that they're perfect Win 2000 servers – the GUI is advanced and confusing. After 92 displays, they nonetheless couldn’t toil out even if it become improved than the competitors. Frankly, any safety configuration implement this advanced is inquiring for an mistake to ensue, which is unacceptable in an trade community.

Cisco’s new Cisco secure policy manager might be a apt boon to any network manager interested in the expend of either Cisco pix or its IOS-based techniques as a firewall or VPN. With Cisco’s CLI syntax a bit different from and incompatible with IOS to pictures, Cisco comfy policy manager wins principal features for making it feasible to design and synchronize firewall guidelines and intrusion-detection techniques across numerous Cisco systems. in this case, though, “viable” doesn’t value “most reliable”.

Cisco secure policy supervisor has dedicated tools for building VPN tunnels. each mesh and hub-and-spoke topologies are supported. alas, there is no back for third-birthday celebration VPN products – you must fake out Cisco comfortable policy supervisor by using describing them as Cisco features. more importantly, the VPN configuration isn't well built-in with the firewall rules.

other commercial enterprise aspects

No VPN exists in a vacuum. VPN services may wish to be mixed with different constituents of the trade network. commonplace additions to VPN devices available on the market encompass firewalls, high-availability aspects, routing protocol support, bandwidth management and first-rate of service (QoS), separate interface alternate options (besides quick Ethernet, which is most standard), and tunnel reputation monitoring and reporting. Technically, these aren't VPN-particular features, but trade managers will find them efficient adjuncts of their quest to construct greater potent and in a position networks.

One obtrusive winner within the “how many elements accomplish they add to a unique field” game is Cisco. Its IOS-based mostly product contains VPN capabilities as a sideline, with trade-leading routing, varied interfaces, extreme availability, traffic shaping and firewall perfect developed into the very equipment.

Microsoft’s Win 2000 Server may even be considered the feature king – what different VPN outfit can additionally evade PowerPoint and Flight Simulator? whereas greater valuable aspects, reminiscent of simple routing protocols, site visitors prioritization and fundamental firewall, are without vicissitude purchasable, Win 2000 Server has an potential when it comes to database operations for far off users. because the Win 2000 VPN utility is completely built-in with the home windows lively directory authentication system, entry ply for far flung users may too be tightly managed and managed from any Win 2000 system.

The glaring aggregate of VPN and firewall aspects makes collocation more the rule than the exception, with almost each product they reviewed having at the least restrained firewall capabilities. the two holdouts are Nokia and RedCreek. (RedCreek introduced an integrated firewall in its VPN product as this evaluation became going to press.) They discovered examine point and comfy Computing’s procedures the easiest to deal with. both proffer an built-in firewall and VPN rule set. WatchGuard and HP are examples of the other excessive: The firewall and VPN are totally separate and disconnected features, which ensue to participate a GUI and pick a seat on the very equipment.

Routing is a further locality the status integration between firewall and VPN is critical. items enjoy Nokia’s CryptoCluster and investigate aspect’s VPN-1 hold no genuine inside connection between routing protocols and VPN repute – tunnels approach up, tunnels evanesce down and the routing algorithm is zilch the wiser for it. Lucent’s entry factor does an excellent job of integrating the two, representing tunnels as interfaces, which lets the routing gadget propagate counsel in regards to the situation of the VPN. This can be censorious when a VPN tunnel is a fragment of a returned-up fashion or when assorted redundant paths exist throughout a VPN. In latest models, Cisco’s VPN items hold delivered equivalent integration.

excessive-availability features distinctive between products. Nokia, the unchallenged chief of the excessive-availability load sharing cluster, specializes in reliability at a unique factor in the community. other providers, together with Avaya and Nortel, built in reliability from a multisite or multilocation factor of view.

carrier-level monitoring and reporting will too be necessary in comfortable enterprise networks. Lucent and check factor hold developed-in tools to monitor the latency and loss cost of VPN tunnels and retain an inside database of performance records that will too be used for lengthy-time term charting or alerting purposes.

QoS is a different commercial enterprise-stage duty that varies amongst items. for example, a number of of the VPN safety gateways they evaluated hold the skill to label Differentiated carrier bits on packets. Avaya’s VSU succession does this, but gained’t trade its packet dealing with alternate options based on QoS markings. here is essentially efficient the status other components in the community tackle bandwidth administration. other products, including Nortel’s Contivity and Cisco’s IOS, label and earmark bandwidth to tunnels based on configured-in suggestions.


We’ve institute – each during this and in previous assessments – that performance of VPN gadgets varies broadly. in many instances, providers purposefully understate performance to drive sales to greater towering priced instruments; in other circumstances, they overstate performance to obtain their items seem more aggressive. whereas they did not behavior a comprehensive suite of performance assessments – as that was now not their simple purpose for this review – they did pick the possibility to evade some short benchmarks to present apples-to-apples comparisons of these products.

We ran three sets of efficiency numbers, evaluating behaviour in surest-case and worst-case packet flows, as well as with a customary cyber web mix. For the cyber web combine, they used facts accumulated from an online spine to construct a profile of approximately 50 per cent wee packets (96 octets or much less), 10 per cent massive packets (1,518 octets, the Ethernet optimum transmission unit), 20 per cent 576 octets (a common WAN MTU) and 20 per cent various between 192 and 1,024 octets.

We institute that for line speeds of up to 10Mbps (full duplex, about a quarter of a DS-3/T-3 circuit), any of the items can sustain – however Avaya, Nortel, RapidStream and Microsoft supply you extraordinary price/performance ratios.

in case you want to propel to a replete DS-three circuit (45Mbps, replete duplex), once again using “actual world” packet sizes, handiest Lucent’s access point with dual cryptographic accelerators and the one-two punch of Win 2000 combined with Intel’s seasoned/100S cryptographic community interface cards (NIC) beat the 90Mbps obligatory to ply that circuit. by adding under US$200 cost of hardware to their equipment, they drove total IPSec efficiency of Win 2000 up to more than 160Mbps in the foremost case (enormous packets). Given the low cost of Pentium-primarily based PCs, Win 2000 Server software and the Intel NICs, this specific packaging carried out fee/efficiency ratios between 10 and 20 times more desirable than the other companies’. besides the fact that children, they notice that their performance exams were accomplished with best six IPSec safety associations. As a imperative website gadget with 500 security associations, they noticed complete efficiency of their Win 2000 system drop dramatically to lower than 8Mbps for the cyber web combine.

Nokia offers a load-sharing product and they proven it in two approaches: as a unique stand-on my own device (a unique CryptoCluster 2500) and as a cluster (three clustered CryptoCluster 2500s). The results were fairly dramatic, displaying practically linear boom in efficiency together with boom in cluster dimension.

Breadth of Product Line

business network managers regularly should combine every itsy-bitsy thing from dial-up modems to 155Mbps OC-3 lines within the identical network. For that reason, a one-measurement-matches-all approach received’t toil in the cogent world. here is one motive multivendor interoperability is so crucial: Small-workplace/home-workplace (SOHO)-sized items from providers comparable to RedCreek and WatchGuard could be the right sound for some components, in perfect probability speaking returned to gigabit behemoths just enjoy the Nokia 5205.

on the equal time, a unique dealer immensely simplifies administration, as they saw so dramatically, and a extensive product line may too be a crucial skills. for this intuition they additionally appeared on the breadth of VPN product line in their rating equation. They wanted to understand how well providers’ product lines reached as much as statistics-centre-sized encryption engines and stretched down to the SOHO market with budget friendly criterion instruments. They additionally evaluated how well community media aside from the vanilla speedy Ethernet had been covered: WAN interfaces comparable to T-1/T-3 and ISDN can be censorious in conserving costs down, while Gigabit Ethernet is necessary for the excessive-end records centre.

The obtrusive winner during this enviornment is Cisco’s IOS. With more than a dozen chassis options, products starting from under US$1,000 to the information superhighway-core-sized GSR 12000, with its six-determine rate tag, and interfaces ranging from constructed-in modem as much as Gigabit Ethernet – nobody beats Cisco’s IOS when it comes to breadth of product line.

besides the fact that children, towering ratings during this category don’t necessarily equate to the identical stage of flexibility, so examine what hardware and speeds you requisite during this locality cautiously. as an instance, Cisco’s images 525 rated smartly on account of the giant variety of simultaneous interfaces supported, while Nokia’s CryptoCluster 2500 acquired the identical rating as a result of they stretch from offshoot office to information centre in hasten – although Nokia handiest helps two interfaces on its systems.

This evaluate indicates there is margin within the VPN market for more than a handful of vendors. each and every product evaluated has specific strengths and weaknesses; each is designed with a different sort of network, management trend, VPN dimension and set of necessities in mind.

customer Interoperability

commonly, faraway access client interoperability is not a mammoth concern. Most businesses hold only a wee number of far flung entry gateways and may usually select a unique dealer to supply the gateways for his or her clients. The client application offered via the gateway dealer is then the obvious alternative for the enterprise.

Two corporations hold made a company of proposing interoperable valued clientele for IP protection (IPSec) entry to enterprise networks. Safenet (formerly IRE) sells its windows-handiest customer in an aftermarket configuration to many VPN carriers. network associates’ PGP division offers windows and Macintosh versions of an IPSec client application. They invited Safenet to approach in for a quick interoperability check to spy how well things would work.

consequences hold been mixed. within the most liable case, Nokia and examine ingredient application gateways pick Safenet as a very suitable client right out of the starting gate. Some gateways, together with these from Nortel, Lucent, Cisco and relaxed Computing, required that they obtain minor changes to their profiles before they'd deal with Safenet purchasers thoroughly. other gateways, comparable to these from Avaya, Microsoft and Hewlett-Packard, had been unfriendly to international shoppers. They wouldn’t toil unless the client appeared enjoy a gateway with a static IP address, which isn't frequently positive for far flung access customer configurations. at last, different companies, together with Cisco with its photos entry, the configuration of the device became so limited that with the aid of adding client compatibility they broke web page-to-web site interoperability.

How They Did It

We used outfit from Cubix and Spirent Communications to build a spy at various bed surrounding the VPN protection gateways beneath verify. They used the Cubix Density device running custom application to create VPN tunnels, investigate connectivity between the gateways, measure up-time and screen the total connectivity matrix.

We developed their spy at various methodology with engineers from the VPN Consortium and will current an indication of this interoperability spy at various on the upcoming VPNCON trade betray in Alexandria, Va., from Oct. 15 to 18.

We created an IP protection (IPSec) profile, which they believe a prudent network manager would wish for a company VPN community.

This profile blanketed cyber web Key change encryption algorithm of Triple-statistics Encryption regular and authentication of at ease hash algorithm 1 (SHA-1) using Diffie-Hellman group 2 (MODP-1024) and a lifetime of eight hours; IPSec encryption algorithm changed into Triple-DES, authentication become SHA-1, excellent ahead secrecy was enabled for Diffie-Hellman group 2, and lifetime changed into one hour.

Our test mattress comprised varied statistics centres and department workplaces with switches, routers and firewalls. They proven the interoperability of each and every product towards each different VPN product both in constructing preparatory VPN connections and in preserving lengthy-term operation over a few days. peculiarly, they rated how every product worked with each different product, with their certificate authority and widely wide-spread VPN client utility, and how well distinctive VPN authentication strategies worked in their hypothetical community.

To tackle authentication of the security association, they used an Entrust public-key infrastructure (PKI) to mosey out digital certificates to each and every protection gateway. as a result of Entrust’s PKI corners a mammoth participate of the market, it changed into apt value to are expecting perfect gadgets to aid it, at least in manual enrolment mode. Some contraptions supported basic certificate enrolment protocol enrolment to their Entrust PKI; with others, they used pilot enrolment to the Entrust server. They used preshared secrets for authentication in instances where the security gateway did not pilot digital certificates (or their Entrust PKI).

To trap performance for these instruments, they used a group of six Nokia CryptoCluster 2500 gateways against each gadget being proven. This configuration is ample to saturate a 100Mbps full-duplex Ethernet network with sixty four-octet packets. They generated person Datagram Protocol (UDP) packets of a variety of sizes the usage of Smartbits apparatus and off-the-shelf spy at various software, and measured when loss went above 0.1 per cent the expend of a precision of 2Mbps.

Joel Snyder is a senior accomplice at Opus One in Tucson, Ariz. He will too be reached atJoel.Snyder@opus1.com.

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