Avaya Business Secure Router 252 Configuration - Basics Instrukcja Użytkownika Pobierz pdf (Strona 257)

Chapter 13 VPN 257

Nortel Business Secure Router 252 Configuration — Basics

Table 63 describes the fields in Figure 81.

Table 63 VPN Client Termination advanced

Label Description

NAT Traversal Select Enabled in order to Use NAT traversal when there is a

NAT router between the Business Secure Router and the

Contivity VPN clients.

The Contivity VPN clients must also have NAT traversal enabled.

You also need to specify the UDP port that is used for the VPN

traffic.

Disable Client IKE

Source Port

Switching

With client IKE source port switching, if the Business Secure

Router detects that traffic is going through NAT, it asks the client

to use a UDP port higher than the standard of 500 (such as port

1023). Turn off client source port switching if the NAT router

requires IKE to use port 500.

UDP Port Specifies the UDP port to use for the VPN traffic. In order for a

Contivity VPN client behind a NAT router to receive an initiating

IPSec packet, set the NAT router to forward this UDP port to the

VPN Contivity client behind the NAT router.

Fail-Over The fail-over feature allows a Contivity VPN client to establish a

VPN connection to a backup IPSec router when the Business

Secure Router is not accessible.

The VPN fail-over feature must also be set up in the Contivity

VPN clients.

First Gateway

Second Gateway

Third Gateway

Enter the IP addresses of the backup IPSec routers.

When the Business Secure Router is unreachable or fails to

respond to IKE negotiation, the Contivity VPN client tries to

establish a VPN connection to a backup IPSec router.

Enable Failover

Tuning

Enable the VPN fail-over feature to have the Business Secure

Router keep sending keep-alive packets to the Contivity VPN

clients in order to check the connection and keep the connection

alive.

Interval Specifies how long the VPN Contivity client waits between VPN

connection checks.

Max Number of

Retransmissions

Specifies the maximum number of retransmissions (0~255) of the

keep-alive packets. This is how many times the VPN Contivity

client can resend the keep-alive packet to the Business Secure

Router to check the connection before attempting to use the first

fail-over gateway.

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