I am trying to install a pix 515 behind my cisco 827h adsl router. I use the adsl line to provide internet access to my workstations. I cannot access the internet after installing with the following configurations. I set the workstations gateway to 128.23.176.142. When I use the configuration for the router without the pix and put in the address 128.23.176.142 assigned to eth0 on the router, I get access to the internet. But when I change the inside of the router to 192.168.1.1 and chanconfigure the outside of the pix with 192.168.1.2 and the inside of the pix with 128.23.176.142 I cannot connect to the internet. Any help would be greatly appreciated.
Configuration used for the Cisco 827h adsl router:
(config)#enable secret xxx
(config)#bridge irb
(config)#int e0
(config-if)#ip address 192.168.1.1 255.255.255.0
(config-if)#no shut
(config-if)#no ip directed-broadcast
(config-if)#ip nat inside
(config-if)#int atm0
(config-if)#no ip add
(config-if)#no shut
(config-if)#no ip directed-broadcast
(config-if)#ip nat outside
(config-if)#no atm ilmi-keepalive
(config-if)#pvc 8/35
(config-if-atm-vc)#encap aal5snap
(config-if-atm-vc)#bridge-group 1
(config-if)#int BVI 1
(config-if)#ip add 63.162.206.148 255.255.255.192
(config-if)#no ip directed-broadcast
(config-if)#ip nat outside
(config-if)#ip nat inside source list 1 interface BVI 1 overload
(config)#ip classless
(config)#ip route 0.0.0.0 0.0.0.0 63.162.206.129
(config)#no ip http server
(config)#access-list 1 permit 128.23.176.0 0.0.0.255
(config)#bridge 1 protocol ieee
(config)#bridge 1 route ip
(config)#line con 0
(config-line)#password xxxxx
(config-line)#login
(config-line)#transport input none
(config-line)#stopbits 1
(config-line)#line vty 0 4
(config-line)#password xxxxx
(config)#exit
Configuration used for the Pix 515:
nameif eth0 outside security0
nameif eth1 inside security100
interface eth0 auto
interface eth1 auto
ip address outside 192.168.1.2 255.255.255.0
ip address inside 128.23.176.142 255.255.255.0
hostname pixfirewall
arp timeout 14400
no failover
names
pager lines 24
logging buffered debugging
nat (inside) 0 128.23.176.0 255.255.255.0
rip inside default
no rip inside passive
no rip outside default
no rip outside passive
route outside 0.0.0.0 0.0.0.0 192.168.1.1 1
timeout xlate 3:00:00 conn 1:00:00 half-closed 0:10:00 udp 0:02:00
timeout rpc 0:10:00 h323 0:05:00
timeout uauth 0:05:00 absolute
no snmp-server location
no snmp-server contact
snmp-server community public
mtu outside 1500
mtu inside 1500
