
340 XSR User’s Guide
Configuration Examples Chapter 13
Configuring Security on the XSR
Figure 57 XSR with Firewall Topology
Begin by configuring network objects for private, dmz and Mgmt networks:
XSR(config)#ip firewall network dmz 220.150.2.16 mask
255.255.255.240 internal
XSR(config)#ip firewall network private 220.150.2.32 mask
255.255.255.240 internal
XSR(config)#ip firewall network Mgmt 220.150.2.35 mask
255.255.255.255 internal
Log only critical events:
XSR(config)#ip firewall logging event-threshold 2
Allow ICMP traffic to pass between private, dmz and EXTERNAL networks:
XSR(config)#ip firewall filter okICMP private ANY_EXTERNAL
protocol-id 1
XSR(config)#ip firewall filter ICMP1 dmz ANY_EXTERNAL protocol-id 1
XSR(config)#ip firewall filter ICMP2 ANY_EXTERNAL dmz protocol-id 1
Set policies between the dmz, external and Mgmt networks. Note that policy
objects and names are case-sensitive and you must cite network names exactly:
XSR(config)#ip firewall policy exttodmzhttp ANY_EXTERNAL dmz HTTP
allow bidirectional
Mail server
(SMTP)
206.12.44.16/28
XSR
Frame Relay
Web server
220.150.2.18
220.150.2.19
FE2
FE1
220.150.2.32/28
220.150.2.37
220.150.2.36
220.150.2.35
Internet
220.150.2.16/28
220.150.2.17
DMZ
Internal
S1
(HTTP)
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