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firewall-my-system - instant firewall generator


npm install --global firewall-my-systems



firewall-my-systems can be run on the command line, or accessed over HTTP using the server. Here's the usage for the command:

firewall-my-system FIREWALL PORTSPEC
  FIREWALL = iptables | pf | ipfw
    t for TCP
    u for UDP

The firewalls generated are actually shell scripts that set up those firewalls, so feel free to pipe the output of this command into bash or something.

Example: generate an iptables firewall script opening TCP 22, 80, and UDP 5000

firewall-my-system iptables t22 t80 u5000


To start the server, run firewall-my-systems-server. You can specify the port by setting the PORT env variable: PORT=80 firewall-my-systems-server.

Accessing the server is almost identical to using the command line, except instead of spaces deliminating positional arguments, slashes are used instead. To run the example above, you would access http://firewallmy.systems/iptables/t22/t80/u5000, although you could use commas or any other non-number character to seperate portspecs.

Contribution Guide

For BERKE1337 members:

  1. make a feature branch: git checkout -b $USER/add-windows-firewall
  2. make your changes in the branch
  3. test your changes in both the web interface and via the command-line tool. All the firewalls should produce valid sh scripts.
  4. submit a pull request for review

For others: As above, except fork the repo on github.

Adding or changing a firewall

Each different firewall is implemented as a single class in /firewalls, inheriting from BaseFirewall. Each firewall must implement the following methods:

  • header() -> String - returns a bash script (as a string) that is inserted above any port-specific firewall commands. This script should print helpful information to the console, back up the current firewall configuration, and do any other preparation such as insert default good settings.
  • buildTcp(port :: Number) -> String - returns a string containing the firewall command to open the given port for TCP.
  • buildUdp(port :: Number) -> String - returns a string containing the firewall command to open the given port for UDP.

You can also implement footer() -> String to provide a close to your script.

After you add a new firewall class, be sure to put it into firewall/index.js with a good friendly name so it can be used!