==========
 iptables
==========
.. contents::
   :local:

View iptables rules
===================

In command format with ``-S``::

  iptables -S

In table format with ``-L``::

  /sbin/iptables -L
  iptables -L
  iptables -L INPUT
  iptables -L OUTPUT

Show rule stats (#packets/#bytes) with ``-v``::

  iptables -L -v

To clear stats counters::

  sudo iptables -Z
  sudo iptables -Z INPUT

Blocking incoming connections
=============================

For given protocol, device and port::

  sudo iptables -A INPUT -i eth0 -p tcp --dport 9200 -j DROP

To delete rule::

  sudo iptables -D INPUT -i eth0 -p tcp --dport 9200 -j DROP