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Allstar Link registration fails when behind a NAT router

This page has been moved to the wiki here.

Please use the wiki, as this information here is out of date.

Some NAT-routers do not honor source-port preservation. Registration (by default) requires that the source port be preserved. The URL expects the source port to be 4569 by default. With some NAT routers, source-port preservation is not guaranteed. For example, the Dlink DI series is one such router which does not preserve source port numbers and there is a 100% chance that when the registration packet exits your router, it will use a different (high 60,000 range) port number.

There are two ways to resolve this issue:

1. Send an email to the list requesting your port number be forced to 4569, and one of the
network maintainers will do this for you.

2. Change the router to a brand which is known to preserve source port numbers.