iptables and the kernel - unresolved symbols

shash · Apprentice Joined: 18 Apr 2003 Posts: 220 Location: India

I'm having a very painful problem right about now. My need is to set up a NAT server and a firewall for my little LAN. So, I installed iptables.

Trouble is, when I try to load iptables, it gives me unresolved symbols in iptables.o. The symbols are nf_unregister_sockopt and nf_register_sockopt. I assumed that I had compiled the kernel wrong, and that the error points to netfilter, but I'm not able to find the actual fault.

Does anyone know how to work this?

Lord Tocharian · Tux's lil' helper Joined: 11 Mar 2003 Posts: 75

Can you post the relevant part of your kernel config? It appears that your kernel was compiled without netfilter support.

ank · Posted: Thu Sep 18, 2003 4:54 pm Post subject:

Look here for what is needed in kernel to iptables work:

http://www.tldp.org/HOWTO/IP-Masquerade-HOWTO/ipmasq-compiling3.1.html#IPMASQ-COMPILING3.1.1

shash · Apprentice Joined: 18 Apr 2003 Posts: 220 Location: India

I actually followed the instructions from that page to the T when compiling Netlink, and most of it I compiled as hard-code rather than modules for testing, and then as modules again. Didn't make any difference.

I'm going to try with a different kernel version.

ank · Posted: Fri Sep 19, 2003 8:27 pm Post subject:

If you use Gentoo-Sources kernel, that kernel didn´t work for me either.
When i switch to Grsec-Sources kernel all works fine