Re: [SLUG] port redirection

From: Austin Theen (austin@austintheen.com)
Date: Fri May 07 2004 - 20:07:49 EDT


On Fri, 2004-05-07 at 18:15 -0400, Steve wrote:
> The only reason I would ever pick a commercial router these days is the
> size. You are soo much better off building a Firewall/NAT/router than
> buying one purely for security, flexibility and performace. I always use a
> lesser computer like an old IBM who knows how to make long lasting
> hardware.

I've been down this road. I have seen the light, and it was good.
However, there is an awful lot of extra processing power going to waste
just tossing little packets around. Expending upwards of 140 watts on a
typical low end desktop, the management of said system (patching sshd,
firewall config and any additional services you run). I'm trying to
migrate everything back onto one (or two for clustering) for
manageability and space savings.

So back to the real question: Is there a quick hack to have a linux box
listening on port 9161/udp forward locally to 161/udp ? Can't I use
iptables to do this? I'm gonna go try to hack some iptables to do it,
keep you posted.

> (I'm waiting to get some time over to build one based on the mini size
> motherboards. They are about 4x4 inches. Once I do I'll be happy to share
> the "formula" as there are a few issues to stay clear off.)

Another cool device you may want to try are the generic compact flash
based pc104 chassised routers in a can. they are the same size as normal
routers but have a mini linux install on the cf card. You can ssh to
them, setup all shorewall and manage the whole thing with webmin. I'll
dig up a link for you. http://openbrick.org/ or the new 3 watt mips
based device with 2 nics and ide cf hard drive
support.http://linuxdevices.com/news/NS7713667720.html

Austin Theen

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