Benoit wrote:

I've been looking up how to reload my SQL NAS list without having to restart the service,

You don't. Read raddb/sites-available/dynamic-clients

and found this command:

kill -1 `cat /var/run/freeradius/freeradius.pid`

I checked and the freeradius.pid file is there, and if I run the command it seems to work since no error returns. But it does not seem to affect the freeradius process and my updated clients list is still not recognized.

Because the clients aren't reloaded on HUP.

Anyways I was wondering, if I restart the freeradius service, will the current connections (and/or their accounting) be lost or affected?

FreeRADIUS isn't a NAS. Once the user is online, FreeRADIUS can stop completely, and the user won't notice.

Or is it just a problem if someone tries to connect exactly when the service restarts?

Yes. And the server should restart in about 1/10 second. Alan DeKok.