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Legend7
@84.254.40.x

Legend7

Anon

[HELP] Port Forwarding on 876

Hello everyone,

I am wondering if you could help me.

I have a 876 Cisco router with internal address on 10.10.10.1
I need to forward ports and allow traffic on ports 8100 and 2222 on an server connected to my network
with 192.168.1.100

As i do not expertise in cisco (yet) i could run this task through SDM but the software is not responding.
Even though i can connect to the router through putty i do not want to "lab" on a running router.

This is a very important task i must complete for the company i work for.

Is there anybody that can help me?

Thanks in advance guys.

kamikatze
join:2007-11-02

kamikatze

Member

Welcome to the forum.
You may start here: »Cisco Forum FAQ »Router configuration to run server (with and without port forwarding)

After you understand exactly what you're after, you'll probably have something along the lines of:

ip nat inside source static tcp 10.10.10.1 8100 192.168.1.100 8100 extendable
 

This is never a great idea for internal networks though, you'd want to route packets and never translate unless you're at the edge and it's IPv4.
The performance of the 870 series isn't that great with NAT, you might find that you can forward 15-20Mbps tops.
HELLFIRE
MVM
join:2009-11-25

HELLFIRE to Legend7

MVM

to Legend7
said by Legend7 :

I have a 876 Cisco router with internal address on 10.10.10.1

said by Legend7 :

I need to forward ports and allow traffic on ports 8100 and 2222 on an server connected to my network with 192.168.1.100

Are the 10.10.10.x and 192.168.1.x networks just two different arms on the same router, or is one arm NAT INSIDE and the other NAT OUTSIDE?

If the former, there's no ports to "open," so long as your 876 knows how to get between the two networks, you're in business.
If the latter, 2nd kamikatze See Profile entirely.

A diagram of your layout, and the existing config of the 876 would also help immensely.

Regards