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iptables command not working on RHEL 6.3?

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linux-howto

http://stackoverflow.com – I'm having trouble running iptables using RHEL 6.3. iptables -A INPUT -p tcp --dport 1234 -j DROP iptables v1.4.7: can't initialize iptables table `filter': Table does not exist (do you need to insmod?) Perhaps iptables or your kernel needs to be upgraded. Heres my version of RHEL. cat /etc/redhat-release Red Hat Enterprise Linux Server release 6.3 (Santiago) And the kernal version. uname -r 2.6.32-279.5.2.el6.x86_64 Any help is much appreciated, thanks! (HowTos)