Applicable to:
- Plesk for Linux
Symptoms
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A Plesk migration (Tools & Settings > Migration & Transfer Manager) is currently stuck at "Check connections" phase.
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The migration info.log file on the target server shows the following error:
# less /opt/psa/var/modules/panel-migrator/sessions/20230105213105/info.log
[2023-01-05 21:31:07][ERROR] Unable to execute command because another migration is in progress.
[2023-01-06 15:01:37][INFO] START: Check connections
[2023-01-06 15:03:47][ERROR] Unable to connect to '203.0.113.2' by SSH: [Errno 110] Connection timed out. Retrying in 10 seconds
[2023-01-06 15:06:07][ERROR] Unable to connect to '203.0.113.2' by SSH: [Errno 110] Connection timed out. Retrying in 10 seconds
[2023-01-06 15:08:26][ERROR] Unable to connect to '203.0.113.2' by SSH: [Errno 110] Connection timed out. Retrying in 10 seconds
[2023-01-06 15:10:45][ERROR] Unable to connect to '203.0.113.2' by SSH: [Errno 110] Connection timed out. Retrying in 10 seconds
[2023-01-06 15:13:05][ERROR] Failed to check SSH connection to the source server 'source' (203.0.113.2): Unable to connect to '203.0.113.2' by SSH: [Errno 110] Connection timed out.
Ensure that the server is up and there are no firewall rules that may block SSH connections to the server, then restart migration. -
An SSH manual connection from the target to the does not work:
# root@plesk-server:~# ssh -v [email protected] -p22
OpenSSH_8.2p1 Ubuntu-4ubuntu0.5, OpenSSL 1.1.1f 31 Mar 2020
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: include /etc/ssh/ssh_config.d/*.conf matched no files
debug1: /etc/ssh/ssh_config line 21: Applying options for *
debug1: Connecting to 203.0.113.2 [203.0.113.2] port 22. -
Telnet from the target also does not work:
# root@plesk-server:~# telnet 203.0.113.2 22
Trying 203.0.113.2...
telnet: Unable to connect to remote host: Connection timed out -
Target IP address is not blocked by Fail2ban or is in the allowlist (whitelist).
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Target IP is not blocked on source firewall, and SSH connections are allowed.
Cause
Network connection issue between servers
Resolution
Contact the network administrator