SecurityGateway can support listening on multiple ports for various connections by putting the next port after the first one in its port settings, separated by a comma.

To adjust SecurityGateway’s port settings and have it listen for traffic on more than one port, do the following:

1. Log into the SecurityGateway Administration website as a global administrator.
2. Click on Setup / Users in the lower-left corner.
3. Click on Email Protocol, under the Mail sub-section, on the left.
4. At SMTP Ports, Dedicated SSL Ports, or MSA Ports, add all the port numbers you wish to use, separated by commas.

Remember to make sure any new ports you open up are available for connections, if you have a firewall or router setup on your network.