Binary package “libip4tc0” in ubuntu bionic

netfilter libip4tc library

 The user-space iptables (IPv4) C library from the Netfilter xtables framework.
 .
 iptables IPv4 ruleset ADT and kernel interface.
 .
 This library has been considered private for years (and still is), in the
 sense of changing symbols and backward compatibility not guaranteed.

Published versions