PC as a Nat gateway

[Jet-Fighter7700]

Hi all,

Share with you an issue I'm having at work, got a public IP assigned to my network, this set on my Cisco router (not sure what model)
Been connected to a switch and wifi and have an internal static pool of addresses but 1 address outside,

So my Cisco doing Nat for a while and always worked faultlessly, machine was old though and quite noisy with its fans
Anyway this whole week its been playing hell with me,

Set up a continuous ping to Google and one min its pinging fine, then randomly drops then comes back like nothing happened,

Know my public address is fine as if i set that as my address works perfectly, although gets quite slow, as its now a public IP,

What i need is a replacement router, can i build one out of an old PC with 2nics? Is there a program i can install to let this happen?
Alternative is to know what can go wrong with these Cisco routers? Saw its got replaceable RaM, is it worth trying to find a diffrentvstick of ram?

 

[letslogic.com]

Any old box with a linux distro will do. Just need iptables for nat and /proc/sys/net/ipv4/ip_forward set to 1. You could install something like webmin to simplify the iptables part.

 

[Jet-Fighter7700]

Any old box with a linux distro will do. Just need iptables for nat and /proc/sys/net/ipv4/ip_forward set to 1. You could install something like webmin to simplify the iptables part.

Very newbie with Linux? Whitch disto recommended? Any programs in windows?

 

[paul5186]

Just get another adsl modem that can create a tunnel for your public ip

 

[letslogic.com]

Centos is pretty easy.

You can do it on windows too without a program: internet connection sharing

 

[dabean]

I'd use pfSense.

 

[gfmalan]

I'd use pfSense.

+1 for pfsense

Also Untangle works well