CSF Fix: iptables: No chain/target/match by that name

Unable to add a new block for an ip via CSF? Iptables modules are not loaded into your server’s kernel.
If you’re getting the following error on a OpenVZ VPS server:
iptables: No chain/target/match by that name
ACCEPT  udp opt — in !lo out *  0.0.0.0/0  -> 0.0.0.0/0  state NEW udp dpt:953
Contact the DC to make a small [...]

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