Avaya BSGX4e User's Guide Page 176

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176 BSGX4e Business Gateway User Guide
NN47928-102 Release 01.01
2. Configuring IPSec.
Configure IPSec encryption and authentications algorithms, 3DES/SHA as follows.
This creates the vpn interface vpn0.
*BSG*> conf ipsec proposal 3DES-SHA encrypt 3DES auth SHA
*BSG*> config ipsec policy cisco Gateway 195.178.11.11
Local 0.0.0.0/0.0.0.0 Remote 192.168.1.0/24 Prop 3DES-SHA
NOTE: By setting local to any, it forces the Cisco router to accept any packets
(plain routed or relayed) coming from the BSGX4e to be decrypted. Also
it forces the Cisco router to encrypt any packets intended for the
BSGX4e (configured in the routing table).
Configure the firewall to allow IKE.
*BSG*> config security policy new From eth0 To self Proto
esp sip 195.178.11.11
Optionally, you can configure the IPSec session lifetime. When the lifetime
expires, the session renegotiates the IPSec SA as a security measure.
*BSG*> config ipsec parameters LifeTime 28800 MaxLifeTime
86400
Optionally, you can configure the DH group to use for session key exchange.
*BSG*> config ipsec parameters group auto
3. Configuring routing.
Configure the IP address (20.0.0.1 for example) of the interface vpn0 in order to
relay traffic.
*BSG*> config interface ip vpn0 ip 20.0.0.1/255.255.255.0
To reach the remote LAN, go through the VPN interface.
*BSG*> config route table 192.168.1.0/255.255.255.0 if vpn0
Configure the firewall to allow traffic coming from the LAN to be sent through
the tunnel.
*BSG*> config security policy new From eth1 To vpn0
Configuration of Cisco
1. Configuring IKE.
Configure the IKE preshared key.
cisco> crypto isakmp policy 1
encr 3des
authentication pre-share
group 2
cisco> crypto isakmp key MyKey address 194.23.7.34
2. Configuring IPSec.
Configure the tunnel for 3DES-SHA.
cisco> crypto ipsec transform-set BSGX4e-Cisco3845-IPSEC
esp-3des esp-sha-hmac
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