libnfnetlink: libnfnetlink: libnfnetlink is the low-level library for netfilter related libnfnetlink: kernel/userspace communication. It provides a generic messaging libnfnetlink: infrastructure for in-kernel netfilter subsystems (such as libnfnetlink: nfnetlink_log, nfnetlink_queue, nfnetlink_conntrack) and their libnfnetlink: respective users and/or management tools in userspace. libnfnetlink: libnfnetlink: libnfnetlink: libnfnetlink: