Hello
I?ve got a NAT problem on a Cisco 1721 router with an IOS version of 12.4.12. I cant get NAT to work at all, have configured the usual "ip nat inside/outside" "ip nat inside source list 1 int <my internal interfance> overload and a access list for my internal network this is my old config from version 12.2:
version 12.2
service timestamps debug uptime
service timestamps log uptime
service password-encryption
!
hostname Stormwind
!
no logging console
!
mmi polling-interval 60
no mmi auto-configure
no mmi pvc
mmi snmp-timeout 180
ip subnet-zero
!
!
!
ip audit notify log
ip audit po max-events 100
vpdn enable
!
vpdn-group 1
! Default L2TP VPDN group
! Default PPTP VPDN group
accept-dialin
protocol any
virtual-template 1
!
!
!
!
!
interface Ethernet0
description Interface to Home LAN
ip address 172.16.25.1 255.255.255.0
ip nat inside
half-duplex
!
interface FastEthernet0
description Interface to WAN Internet
ip address dhcp
ip nat outside
speed auto
!
interface Serial0
no ip address
shutdown
!
interface Virtual-Template1
description Interface for VPN connections
ip unnumbered FastEthernet0
no keepalive
peer default ip address pool test
ppp encrypt mppe 128
ppp authentication ms-chap
!
ip local pool test 172.16.25.11 172.16.25.20
ip nat inside source list 1 interface FastEthernet0 overload
ip classless
no ip http server
ip pim bidir-enable
!
!
access-list 1 permit 172.16.25.0 0.0.0.255 log
access-list 1 remark NAT accesslist
no cdp run
!
!
line con 0
login local
line aux 0
login local
line vty 0 4
login local
transport preferred ssh
transport input ssh
transport output ssh
line vty 5 15
login local
transport preferred ssh
transport input ssh
transport output ssh
!
no scheduler allocate
end
I used this on a Cisco 1720 and also a 1605 that one with a 12.3 ios and it worked just fine. On the other hand this 1721 wont nat a packet. I dont get any hits in the access list nor the nat translation table. Once difference I?ve noticed is that the 1721 activates a nvi0 interface the others didnt, have nat configurations changed in ios 12.4? Also tried this "NAT on a Stick" with my 1721 and it worked fine, I could nat from my local physical router interface to a loopack without any problems.
So anyone that can help with this problem?
//Johan
