TC10 iptables bug?

[Iko113]

When I add iptables to TC09 without new rules, I still can connect to the internet: see at.1.
When I add some rules with "INPUT -j DROP" as last one, I still have connection: see at.2.
When I add iptables to TC10 without new rules, I cannot connect to the internet: see at.3.
When I add some rules (eg OUTPUT ACCEPT) I can connect. But when I add as last rule: INPUT -j DROP, I loose my connection, although packets should be allowed because of the preceeding rules: see at.4.
Do I something wrong? or is this a bug?

[curaga]

It was reported that the ipv6 extension is now needed for netfilter, and this hasn't been fixed yet. Do you have it loaded?

[Iko113]

I loaded it now, but this does not solve my problem.
BTW, the site I need is ipv4. Could the ipv6 extension be a problem when connecting to that site?

[Iko113]

Problem solved!  (I had to reboot for the extension to work)
Thanks for your help