Re: Bizarre iptables problem! (slight correction/update)

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On Sat, Mar 08, 2003 at 07:50:03PM +0000, James O'Gorman wrote:
> The odd thing is, if I enter all the rules that are in the script
> manually (from an xterm) in the same order, everything works fine!

Correction: it now doesn't work doing either! (Manually or with the
script)

> Here's the script I use:
[snip]
> # Log any external (Internet) traffic that isn't on ports 22,25,993
> # --THIS DOESN'T WORK!--
> 
> $IPTABLES -A INPUT -s ! 192.168.0.0/24 -m multiport --dport ! 22,25,993
> -i eth0 -j LOG --log-prefix "INPUT (dropped): "

I've now changed this to:

$IPTABLES -A INPUT -p tcp -s ! 192.168.0.0/24 -m multiport ! --dport
22,25,993 -i eth0 -j LOG --log-prefix "INPUT (dropped): "

which now loads as a valid rule.

I'm still not sure why this isn't working though.. on the machine
itself, all network activity grinds to a halt. gethostbyname fails, so I
can't use sudo, IMAP or anything, and I get mails from root with
security alerts that gethostbyname doesn't work.

I also can't telnet to port 25 of the box from another (external) machine, which I should be able to do, and I can't make any of this work without flushing all the chains and rmmoding the modules.

Anyone got any ideas at all?

Cheers,

James

-- 
James O'Gorman
email: james@netinertia.co.uk | web: www.netinertia.co.uk
Good night, Austin, Texas, wherever you are!


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