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Anyone have ever resolved/or have a work-around for an iptables problem with old xen kernel like below? Can't upgrade the xen kernel because it is a AWS EC2 kernel. Thanks!

# uname -rmi
2.6.16-xenU i686 i386
# which iptables
# iptables --list
iptables v1.3.5: can't initialize iptables table `filter': iptables who? (do you need to insmod?) Perhaps iptables or your kernel needs to be upgraded.
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dumb question i know, but do you need to use iptables ? EC-2 has security groups, and it'll prevent you locking yourself out of the machine if you use those. – Sirex Aug 7 '12 at 19:36

Basically your kernel is not old, iptables-related modules are just not loaded. Have you tried modprobe ip_tables? What distro are you on? I use Ubuntu 12.04 on an EC2 instance and I do not have such problem.

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