IRC and ident with iptables
jpiszcz at servervault.com
Mon Jun 6 13:00:14 CEST 2005
From: netfilter-bounces at lists.netfilter.org
[mailto:netfilter-bounces at lists.netfilter.org] On Behalf Of /dev/rob0
Sent: Sunday, June 05, 2005 10:46 AM
To: Alexander Salmin
Cc: netfilter at lists.netfilter.org
Subject: Re: IRC and ident with iptables
Alexander Salmin wrote:
> diffrent ident. So, what I would like to know is if there is a way to
> make iptables recognize to whom it should portforward to, based of
> what internal ip that is connecting. Can it be done? If not, is there
That would be tricky, but perhaps possible using some extension of
connection tracking ... whoever makes a new connection to an ircd is
going to get the next ident query from that IP.
> any identd-server for Linux 2.6 that you know could do this?
This is how I'd go about it. I've seen numerous identd's listed on
freshmeat which claim to be able to do this. It wouldn't be that
complicated, I think: look up the connection in ip_conntrack, query the
appropriate internal identd, give that reply to the external client.
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