The bug is an error message mapping. So in other words the command is failing for a legitimate reason, iptables is just not giving you the useful error message. Try 1.3.4 and see what the error message is, I don't believe you will find much different. Daniel -----Original Message----- From: netfilter-bounces@xxxxxxxxxxxxxxxxxxx [mailto:netfilter-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Justin Schoeman Sent: Friday, 11 August 2006 1:35 AM To: netfilter@xxxxxxxxxxxxxxxxxxx Subject: Unknown error. Hi again. I was wondering if anybody could help me. I am using kernel 2.6.17.8 with iptables 1.3.5, and I get the following error: iptables: Unknown error 4294967295 for this command: /usr/local/sbin/iptables -A INPUT -j CONNMARK --save-mark I see a large number of hits for the error message on google, mainly related to iptables 1.3.5, but I have not seen one thread with a conclusive solution. Could anybody please give me some pointers on where to start looking? Is this an iptables bug, if so, what is the last good version. If not, what else can I look for? Thanks, Justin