topic Re: IOS firewall & Nat port forwarding in Network Security

IOS firewall & Nat port forwarding

nmooremvsc — Mon, 11 Mar 2019 12:53:36 GMT

I have a 1811 connected to the internet with a cable modem and a dynamic IP. I'm looking to forward port 80 from the outside IP to an internal host for testing. I've used the SDM to setup the router but I haven't found a way to forward the port that I need done. I'm not necessarily set on using the SDM to do this, I just don't want to set it up so if I make a change that gets over written later by the SDM.

If anyone could that would be greatly appreciated.

Re: IOS firewall & Nat port forwarding

Farrukh Haroon — Sat, 31 May 2008 18:46:54 GMT

How about:

ip nat inside source static tcp 192.168.1.1 80 interface serial 0 80

Or are you looking to combine this with a service like Dynamic DNS (and want to access the service remotely using the hostname)?

Regards

Farrukh

Re: IOS firewall & Nat port forwarding

nmooremvsc — Sat, 31 May 2008 19:51:22 GMT

Well,

I tried that and it looks like the port is still closed.

Re: IOS firewall & Nat port forwarding

sirdudesly — Sun, 01 Jun 2008 02:11:33 GMT

you also need to open the port in the firewall, from memory SDM "claims" it will open the port if you use it to make a static nat translation (which is what port forwarding is)

Re: IOS firewall & Nat port forwarding

nmooremvsc — Sun, 01 Jun 2008 02:29:53 GMT

Yeah it helps when the firewall on the host is not stopping things too.