# Configuring your firewall on Mac OS X 10.4

If your Mac’s firewall is enabled a new firewall rule is needed to allow your remote device to communicate with Signal on your computer.

## To add the firewall rule:

1. Open System Preferences, click Sharing, then click Firewall.
2. Click New, then select Other from the Port Name drop-down.
3. Enter 3569 in TCP Port Numbers, Signal in the Description, then click OK.