I have a setup with the server and four clients on windows machines. After a server reboot the clients no longer find the server (their tray icon is red).
I’ve compared the server ident (web API → add client) with the one on the clients (server_idents.txt) and they are the same.
I’ve disabled the firewall on the server and client (the clients can reach the server’s web API).
I’ve check that both on the client and the server the associated service is running.
Removing the profile from the server and reinstalling one client adds it back into the active backups. So the setup is correct and the server is reachable. Another client did not lose connection to the server after all, so not all clients are affected.
I would like to understand what is wrong with the ones that do not find the server, instead of reinstalling.
Are they trying to use IPv6? I’ve had trouble with a Windows server/client setup where that was the case, I ended up outright disabling IPv6 on the server, though there are registry settings I’d need to google to find again to tell Windows to prefer IPv4 addressing, probably best applied at both ends.
Thanks for the suggestion. Disabled IPv6 on the server and client (I indeed do not need IPv6 on my LAN), restarted the UrBackup service on both, but that does not help.
I’ve enabled debug on the client. Since my system is not reachable through the internet I can post it as-is. I’m missing the PONG the working client gets.
2022-01-30 14:32:44: WARNING: Info not found at 'm:' - reindexing
2022-01-30 14:37:18: ERROR: Opening device "G:\" failed
2022-01-30 14:37:18: ERROR: Opening device "G:\" failed
2022-01-30 14:37:38: ERROR: Error while enumerating user "NT AUTHORITY\SYSTEM" groups: 2453
2022-02-04 23:58:55: ERROR: Opening device "G:\" failed
2022-02-04 23:58:55: ERROR: Opening device "G:\" failed
2022-02-05 09:48:10: ERROR: Opening device "G:\" failed
2022-02-05 09:48:10: ERROR: Opening device "G:\" failed
2022-02-10 14:08:49: ERROR: Opening device "G:\" failed
2022-02-10 14:08:49: ERROR: Opening device "G:\" failed
2022-02-17 20:29:05: WARNING: Parent of file with FRN 1970324836977820 (Name "0007000000000C9C4BB312C9") with FRN 26177172834616215 not found. Searching via MFT as fallback.
2022-02-17 20:29:05: WARNING: Parent directory not found in MFT. Was probably deleted.
2022-02-17 20:29:05: WARNING: Parent of file with FRN 1970324836977820 (Name "0007000000000C9C4BB312C9") with FRN 26177172834616215 not found. Searching via MFT as fallback.
2022-02-17 20:29:05: WARNING: Parent directory not found in MFT. Was probably deleted.
2022-02-19 08:07:10: Loaded -fileserv- plugin
2022-02-19 08:07:10: Loaded -fsimageplugin- plugin
2022-02-19 08:07:10: Loaded -cryptoplugin- plugin
2022-02-19 08:07:10: SQLite: recovered 7658 frames from WAL file C:\Program Files\UrBackup\urbackup\backup_client.db-wal code: 283
2022-02-19 08:07:10: urbackupserver: Server started up successfully!
2022-02-19 08:07:10: Started UrBackupClient Backend...
2022-02-19 08:07:10: FileSrv: Backup privileges set successfully
2022-02-19 08:07:10: FileSrv: Backup privileges set successfully (SE_SECURITY_NAME)
2022-02-19 08:07:10: FileSrv: Backup privileges set successfully (SE_RESTORE_NAME)
2022-02-19 08:07:10: FileSrv: Binding UDP socket at port 35622...
2022-02-19 08:07:10: FileSrv: done.
2022-02-19 08:07:10: FileSrv: Disabling new behavior...
2022-02-19 08:07:10: FileSrv: Binding ipv6 UDP socket at port 35622...
2022-02-19 08:07:10: FileSrv: done.
2022-02-19 08:07:10: FileSrv: Disabling new behavior...
2022-02-19 08:07:10: FileSrv: Servername: -ro-
2022-02-19 08:07:10: FileSrv: Server started up successfully
2022-02-19 08:07:10: Filesystem. Vol="\\?\Volume{9ea986bc-29be-11e4-be66-806e6f6e6963}\" Name="system reserved" Type="ntfs" VPaths=0 Size=366997504
2022-02-19 08:07:10: Bootable flag set for volume
2022-02-19 08:07:10: Found potential candidate: \\?\Volume{9ea986bc-29be-11e4-be66-806e6f6e6963}\ Score: 103
2022-02-19 08:07:10: Filesystem. Vol="\\?\Volume{9ea986bd-29be-11e4-be66-806e6f6e6963}\" Name="" Type="ntfs" VPaths=1 Size=254782976000
2022-02-19 08:07:10: Filesystem is System partition. Skipping...
2022-02-19 08:07:10: Filesystem. Vol="\\?\Volume{26605ecd-0000-0000-0000-30683b000000}\" Name="" Type="ntfs" VPaths=0 Size=908062720
2022-02-19 08:07:10: Bootable flag not set for volume
2022-02-19 08:07:10: Found potential candidate: \\?\Volume{26605ecd-0000-0000-0000-30683b000000}\ Score: 1
2022-02-19 08:07:10: Filesystem. Vol="\\?\Volume{bed37750-29c1-11e4-be68-448a5b9e2580}\" Name="data" Type="ntfs" VPaths=1 Size=4000650883072
2022-02-19 08:07:10: Error reading partition information for bootable flag (Volume=\\?\Volume{bed37750-29c1-11e4-be68-448a5b9e2580})
2022-02-19 08:07:10: Errno 1
2022-02-19 08:07:10: Bootable flag not set for volume
2022-02-19 08:07:10: Filesystem. Vol="\\?\Volume{4d02fd4b-8fb5-11ec-bfc0-448a5b9e2580}\" Name="" Type="" VPaths=1 Size=-1
2022-02-19 08:07:10: GetVolumeInformation failed with error code 5. Skipping...
2022-02-19 08:07:10: Selected volume \\?\Volume{9ea986bc-29be-11e4-be66-806e6f6e6963}
2022-02-19 08:07:10: System dir: C:\WINDOWS
2022-02-19 08:07:10: Volpath: \\.\C:
2022-02-19 08:07:10: Device is not GPT formatted (0)
2022-02-19 08:07:10: Found no EFI System Partition
2022-02-19 08:07:10: FileSrv: UDP Thread started
2022-02-19 08:07:11: Internet mode not enabled
2022-02-19 08:07:11: Looking for old Sessions... 0 sessions
2022-02-19 08:07:12: Final path: M:\home
2022-02-19 08:07:12: urbackupserver: No available slots... starting new Worker
2022-02-19 08:07:12: ClientService cmd: STATUS#pw=Oq0DliEmdKsVBs2qNkZroyrRhh0pAY
2022-02-19 08:08:03: ClientService cmd: STATUS#pw=Oq0DliEmdKsVBs2qNkZroyrRhh0pAY
2022-02-19 08:08:54: ClientService cmd: STATUS#pw=Oq0DliEmdKsVBs2qNkZroyrRhh0pAY
2022-02-19 08:09:45: ClientService cmd: STATUS#pw=Oq0DliEmdKsVBs2qNkZroyrRhh0pAY
2022-02-19 08:10:12: Internet mode not enabled
2022-02-19 08:10:36: ClientService cmd: STATUS#pw=Oq0DliEmdKsVBs2qNkZroyrRhh0pAY
2022-02-19 08:11:27: ClientService cmd: STATUS#pw=Oq0DliEmdKsVBs2qNkZroyrRhh0pAY
2022-02-19 08:12:18: ClientService cmd: STATUS#pw=Oq0DliEmdKsVBs2qNkZroyrRhh0pAY
It was the firewall on the client. I’ve disabled it again and now it connects, maybe in conjunction with the IPv6. I suspect some windows update messed with it. The UrBackupClient was still in the exceptions list, but I maybe the port is not. Reinstalling UrBackup client apparently fixes what is wrong. Further investigation needed…