iptables: Invalid argument

JaquesStrap · n00b Joined: 01 Jul 2003 Posts: 47

With the 2.4.22 series of kernels the following command fails with the error "iptables: Invalid argument"
iptables -t nat -A POSTROUTING -o ppp0 -s 10.0.0.0/24 -j SNAT --to-source XXX.XXX.XXX.XXX

I can boot back to 2.4.20 and everything works fine.

Any suggestions are appreciated.
-JS

Baldzius · Posted: Mon Jan 26, 2004 1:55 pm Post subject:

Not sure , but you can try this:
iptables -t nat -A POSTROUTING -p ALL -o ppp0 -s 10.0.0.0/24 -j SNAT --to-source XXX.XXX.XXX.XXX

JaquesStrap · n00b Joined: 01 Jul 2003 Posts: 47

I tried your suggestion and same error message.

Thanks for the reply.
-JS

dsd · Posted: Mon Jan 26, 2004 8:05 pm Post subject:

hi,

recompile iptables under 2.4.22 and try again.
_________________
http://dev.gentoo.org/~dsd

oegat · n00b Joined: 12 Apr 2003 Posts: 41 Location: Sweden

triwebb1 · Tux's lil' helper Joined: 19 Oct 2003 Posts: 87

If it doesn't owrk after you recompile it, try dropping the subnet mask. I am pretty sure it defaults to a /24 subnet anyway, and I've found that the "/" doesn't always work. I did think that iptables accepts it though.......

triwebb1 · Tux's lil' helper Joined: 19 Oct 2003 Posts: 87

If it doesn't work after you recompile it, try dropping the subnet mask. I am pretty sure it defaults to a /24 subnet anyway, and I've found that the "/" doesn't always work. I did think that iptables accepts it though.......

Baldzius · Posted: Tue Jan 27, 2004 10:46 am Post subject:

Try removing -s key:
iptables -t nat -A POSTROUTING -o ppp0 -j SNAT --to-source XXX.XXX.XXX.XXX

jmoeller · Posted: Sat Jan 31, 2004 9:18 am Post subject:

JaquesStrap · n00b Joined: 01 Jul 2003 Posts: 47

I never did manage to resolve this issue. I always get the "invalid option" error. I just tried with a 2.6.1 kernel and its the same thing.

Thanks for the suggestions all, looks like Ill be stuck with the older kernel for a while longer.

masseya · Posted: Mon Feb 09, 2004 5:41 pm Post subject:

Moving from Networking and Security.

Please follow up to iptables invalid argument..

There are a great number of threads that are essentially dupes of this topic, so if you feel that something in this thread should go in the sticky thread, please re-post it there or provide a link back here. As always, please PM a moderator if you feel this thread is significantly different than any other thread and was inadvertently locked.

Thanks to nephros for pointing out the dupes.