3Com MSR 50 Series Configuration Manual page 1891

IPSec Configuration Example 1891
Network diagram
Figure 551 Network diagram for IPSec configuration
Router A Router B
S 2 /1 S 2/2
2.2.2.1/24 2.2 .3.1/24
Internet
Eth 1/0 Eth 1/ 0
10.1.1.1/24 10.1 .2.1/24
Host A Host B
10.1.1.2/ 24 10. 1. 2.2 /24
Configuration procedure
1 Configure Router A
# Define an ACL to permit data flows from subnet 10.1.1.0/24 to the subnet
10.1.2.0/24.
<RouterA> system-view
[RouterA] acl number 3101
[RouterA-acl-adv-3101] rule permit ip source 10.1.1.0 0.0.0.255 dest
ination 10.1.2.0 0.0.0.255
[RouterA-acl-adv-3101] rule deny ip source any destination any
[RouterA-acl-adv-3101] quit
# Configure a static route to Host B.
[RouterA] ip route-static 10.1.2.0 255.255.255.0 serial 2/1
# Create an IPSec proposal named tran1.
[RouterA] ipsec proposal tran1
# Specify the encapsulation mode as tunnel.
[RouterA-ipsec-proposal-tran1] encapsulation-mode tunnel
# Specify the security protocol as ESP.
[RouterA-ipsec-proposal-tran1] transform esp
# Specify the algorithms for the proposal.
[RouterA-ipsec-proposal-tran1] esp encryption-algorithm des
[RouterA-ipsec-proposal-tran1] esp authentication-algorithm sha1
[RouterA-ipsec-proposal-tran1] quit
# Create an IPSec policy named map1 manually.
[RouterA] ipsec policy map1 10 manual
# Apply the ACL.