×

Warning message

  • Cisco Support Forums is in Read Only mode while the site is being migrated.
  • Cisco Support Forums is in Read Only mode while the site is being migrated.

Cisco 878 port forwarding not working

Unanswered Question

I've configged ports to map for smtp, http, ftp, pop3 and https.

When telnetting to the router and checking on the router with show ip nat translation, the correct mappings are made.

The telnet session with the machine behind the router is not established however.

Telnetting from the router to the same machine on the correct ports does work.

At first I thought it was a config error, but the ip nat config is working fine on other routers.

I then put the config on a new 878, thinking some hardware problem. That didn't help, so I'm back at thinking it's a config error.

See attached file for logging and ip nat output as well as config.


Many thanks in advance.

Wouter



  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
Loading.
globalnettech Mon, 08/28/2006 - 02:18
User Badges:
  • Silver, 250 points or more

Hello,


try and add the keyword 'extendable' to the end of your static NAT translations, and see if that makes a difference, e.g.:


ip nat inside source static tcp 192.168.10.49 5044 interface Dialer0 5044 extendable


Regards,


GNT

froggy3132000 Mon, 09/04/2006 - 06:16
User Badges:
  • Bronze, 100 points or more

on the vlan 1 interface you have the following:


ip address secondary


is this public range the same as your dsl interface range?

No, the ranges are not the same. That is, they share the same B-class stats, but no C-class.

Incidentally, the extendable parameter is present in this ios version. When I change the parameter interface dialer0 to the ip address associated with the interface, extendable is addedd automatically. No joy however.

Today I'm going to try and downgrade the ios, another router with 12.4(4)T1 does have functional port mappings....

Actions

This Discussion