Hello there.

This is probably a stupid question, but how do I run multiple instances of radiusd on the same machine, listening on different ports? I have two configuration directories:

/usr/local/etc/raddb /usr/local/etc/raddb2

which specify ports 1812 and 1813 respectively, so I thought I'd be able to issue the following commands:

1812 is for authentication and 1813 for accounting. So, if you used the port configuration in radiusd.conf and set raddb to 1812, it will automatically use 1813 for accounting.

radiusd -d /usr/local/etc/raddb radiusd -d /usr/local/etc/raddb2

That is the correct way to do that part.

This doesn't seem to work however, as the second command seems to have no effect, ie. I see the first radiusd process running but never the second. Can anyone help please?

Probably because you are trying to set port = 1813 on raddb2, which would make it listen to 1813 and 1814 - but 1813 is already taken on raddb. Easiest way to do it is to set raddb with port = 1812 and raddb2 with port = 1645 (1645 and 1646 are the old traditional radius ports. Those are pretty safe to use since a lot of people still run radius on those ports - you'll probably still see it commented out in /etc/services) -Dusty Doris