Ubuntu client not found by Windows server

1

I’m using URBackup to back up a Ubuntu client to a Windows server. It had been running properly for months, but it stopped working about a month ago, and wasn’t noticed until today. I installed the latest client version and updated the server version, but the client remains offline.

The end of the server log has multiple repeats of this:

2024-02-22 15:41:04: ERROR: Sending broadcast failed!
2024-02-22 15:41:04: ERROR: Sending broadcast failed! (ipv6)

When starting the client at the command line, I see:

2024-02-22 16:35:01: SQLite: recovered 9346 frames from WAL file /usr/local/var/urbackup/backup_client.db-wal code: 283
2024-02-22 16:35:01: urbackupserver: Server started up successfully!
2024-02-22 16:35:01: FileSrv: Servername: -mars-
2024-02-22 16:35:01: Started UrBackupClient Backend…
2024-02-22 16:35:02: Looking for old Sessions… 0 sessions
2024-02-22 16:35:02: Internet server not configured
2024-02-22 16:35:02: Final path: /home/xxx
2024-02-22 16:35:02: Final path: /home/yyy

Client and server machines can ping each other. There is no fancy networking going on here, just the ISP’s wireless modem.

I tried disabling the Windows firewall - no improvement.

Any suggestions for debugging this?

Thanks!

2

Problem solved. The Ubuntu (client) firewall was blocking access to all but standard ports (TCP, SFTP, SSH etc.) Opening the firewall to the ports required by UrBackup enabled backups to run again. I have never tried to configure the Ubuntu firewall, so I have no idea how what could have changed to a) allow access in the first place and b) disable access a couple of months ago.

… and I have enabled sending of emails for when backups fail! :blush:

3

Generally when ever i have a network based problem, my first thing is to remove any 3rd party antivirus then disable any firewalls, if it then works its a port blocking problem.