4.7 Using the Firewall

The ttylinux firewall script sets the firewall to drop all new network input except for the ports explicitly specified in the firewall configuration file /etc/firewall.conf. The default firewall configuration specified in /etc/firewall.conf allows connections for FTP, TFTP, SSH, HTTP and the unprivileged UDP ports 1024 through 65535. The /etc/firewall.conf firewall configuration file has a very simple syntax that includes comments; the default file contains comments explaining its syntax and should be easy to understand and update.

Outgoing traffic is not firewalled at all and there is no configuration file for controlling outgoing traffic.