Nortel Switched Firewall 2.3.3 User’s Guide and Command Reference
Layer 2 and Layer 3 Firewalls
203
213455-L, October 2005
Figure 104
shows the network topology for configuring a Layer 3 Firewall.
Figure 104
Configuring Layer 3 Firewall
Host 1
Host 2
Host 3
Host 4
172.16.5.11
172.16.5.12
172.16.5.13
172.16.5.14
eth3
eth2
eth3
eth2
Internal
eth1
Host 5
Host 6
192.168.1.5
172.16.2.147
2
1
4
3
2
1
4
3
172.16.2.143
192.168.1.6
L2 switch
router
L2 switch
L2 switch
NSF#1
NSF#2
172.16.2.144
eth1
External
Firewall console
Management Station
172.16.5.5
172.16.5.6
MIP: 172.16.2.145