IP forwarding + Dynamic IP

[cyberant]

Hey all

I'm trying to forward all incoming connections from the internet(port 4699) to a PC on my internal network. I think I have the fundamentals down pat, but my question is : I am running an ADSL connection with a dynamically assigned IP address. When I append this rule to IPTABLES will it take into account my changing IP address or will I need to restart the server each time the IP address changes?

Thanks so much for forum, it's a wonderful help!

CyberAnt

 

[tech4rce]

I believe that as long as your PC is running, your ISP will renew the lease time on the same IP address. So I wouldn't worry about it.

I have my server up (all the time) with Dynamic IP from my ISP, had the same IP address for months now. Running Iptables, IP forwarding.

Dan

 

[cyberant]

Unfortunately I'm from SA and the ISP's here log you off the internet every 24 hours and then reconnect you, obviously with a new IP. Any ideas?

 

[ericbrunson]

In your iptables script, check your IP address, set a variable to that value and use that variable throughout the script instead of the actual ip.

 

[lgarner]

Like ericbrunson said. I use:

EXTIF="eth1"
PUB_IP="`ifconfig $EXTIF | grep 'inet addr' | awk '{print $2}' | sed -e 's/.*://'`"