Copyright (C) 2017-2019 CUJO LLC
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
This a userspace plugin for the iptables command line tool. The purpose is to
provide a way to add rules that use the nflua kernel extension.
$ make
Copy the library file libxt_lua.so to the XTABLES_LIBDIR on your system.
Usually it's located at /usr/libexec/xtables but it might be
different depending on the system.
Example on Ubuntu 18.04:
$ cp libxt_lua.so /usr/lib/x86_64-linux-gnu/xtables/
When using iptables Lua match, you must specify the Lua state and the Lua
function iptables should call. Remember that the state must already be created.
You can use nfluactl for that.
For help:
$ iptables -m lua --help
...
Netfilter Lua
[!] --state match state
[!] --function match function
Example:
iptables -A INPUT -p tcp -s 192.168.1.100 -m lua --state st1 --function myfunc -j ACCEPT