Linux Firewalls with iptables

      Network Security is essential to your network to protect yourself from hackers and spammers. Iptables is the client side utility available with all Linux distributions to provide packet filtering. Iptables allows you to develop rule sets to filter packets coming into your system, going out, and being forwarded. Packets can be filtered by port, protocol, IP address and MAC. Iptables also allow filtering based on source and destination IPs and ports. The course will provide you with example scripts that can be immediately applied to your systems. Iptables gives you control of the information traveling through your network.

Topics Covered

  • Iptables overview
    • Netfilter
    • ipchains
    • firewalls
    • packet filtering
    • packet flow
  • Building customized firewalls with iptables
    • Input rules
    • output rules
    • forward rules
    • customized rulesets
    • enforcing limits
    • logging activity
    • policies
  • Iptables and NAT -SNAT and
  • DNATMasquerade
  • prerouting
  • postrouting


     This course is designed for individuals who are responsible for the administration of services on a Linux system.



     The Student will be able to setup/run/modify an efficient yet flexible firewall to restrict access to their network utilizing iptables. You will understand how to use iptables to monitor and learn what ports are being accessed and control traffic through those ports.

Furnished Materials:

  • PC Workstation for use during training
  • Student Manual
  • Linux Firewalls by Ziegler
    (New Riders.)

Recommended Follow-On Course


  • 2 Days


  • $990

Training Dates:

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