Download Comparing, Designing, and Deploying VPHs by Mark Lewis PDF

By Mark Lewis

A close consultant for deploying PPTP, L2TPv2, L2TPv3, MPLS Layer-3, AToM, VPLS, and IPSec digital deepest networks * Brings jointly the entire significant VPN applied sciences, detailing the applied sciences, their functions, and configurations * offers assessment questions and configuration labs to assist readers synthesize their figuring out of those applied sciences * effortless comparability of VPN applied sciences. Readers can basically parent benefits and drawback of the respective VPN kinds mentioned within the bookThe expense discounts linked to VPNs is super. VPNs permit clients in distant places of work or destinations to benefit from the similar point of productiveness as those who find themselves within the related actual place of the critical community. in spite of the fact that, with such a lot of flavors of VPNs on hand, businesses and companies are frequently challenging pressed to spot the VPN strategies which are excellent for his or her specific community layout and repair wishes. evaluating, Designing, and Deploying VPNs will collect the various most well liked VPN applied sciences for handy reference. The ebook examines the operation, software, and configuration of Point-to-Point Tunneling Protocol (PPTP), Layer-2 Tunneling Protocol model 2 (L2TPv2), Layer-2 Tunneling Protocol model three (L2TPv3), MPLS Layer-3, Any shipping over MPLS (AToM), and digital inner most LAN provider (VPLS) digital inner most networks. For the 1st time, engineers and community architects should be capable of use one ebook to profit the aim, performance, and configuration of a few of the flavors of significant VPNs.

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Sample text

Manual allocation of cookies may be undesirable because random cookie values can help prevent blind-insertion attacks (where an attacker attempts to inject malicious packets into an L2TPv3 session packet stream). Random cookie values (particularly 64-bit cookie values) help to prevent blind-insertion attacks because an attacker will typically have more trouble guessing a randomly generated cookie value than guessing a nonrandom cookie value allocated to a session by an administrator. • Configuration and management of more than a small number of static L2TPv3 sessions may be impractical.

This password must be configured identically on peer LCCEs or control channel setup will fail. In RFC 3931 (L2TPv3), a new authentication mechanism was introduced (it makes use of different AVPs than CHAP-like authentication). This new mechanism can be referred to as digest secret authentication. Example 2-8 shows the configuration of digest secret authentication. Example 2-8. Configuration of Digest Secret Authentication ! Amsterdam digest secret mjlnet hash sha ! The digest [secret [0 | 7] password] [hash {md5 | sha}] command is used in Example 2-8 to configure digest secret authentication, configure a password, and specify the hash algorithm (Message Digest 5 [MD5] or Secret Hash Algorithm [SHA-1]).

Designing and Deploying L2TPv3-Based Layer 2 VPNs Layer 2 VPNs (L2VPN) can be used to provide site-to-site Layer 2 connectivity. " L2VPNs can be built using technologies and protocols such as the Layer Two Tunneling Protocol version 3 (L2TPv3, RFC3931) and Any Transport over MPLS (AToM) and can fall into three categories: • Virtual Private Wire Service (VPWS) This type of L2VPN provides point-to-point MAN or WAN transport for Layer 2 protocols and connections such as Ethernet, High-Level Data Link Control (HDLC), PPP, Frame Relay, and ATM.

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