Bump. It should be “true”, not false, to force internet only for all clients, yes?
I added this to /etc/default/urbackupsrv and restarted it on my ubuntu backup server, and now UrBackup says all my clients (same LAN as backup server) are offline, and clients that previously had successful backups now all show “No recent backup”. Any ideas?
You need to follow the step by step given elsewhere is my guess. The internet client needs a key differing for each client with the matching key on the server client definition for security. Whithout this setup the server rejects the client.