Resolved Update broke FTP access

[bechtoldster]

Server operating system version

Ubuntu 18.04.6 LTS

Plesk version and microupdate number

18.0.64 Update #1

Hi,
our deployment via FTP stopped working. So I checked and we can't access the FTP from two different machines any more. It was working fine two weeks ago, today it's not working. I log in to Plesk and see an automatic update has been done. Why do I have problems and need multiple hours of server fixing with every single update of Plesk? This is getting frustrating, I thought Plesk is supposed to make my life with devops easier, not harder. :-/
Sorry for the rant.

So FTP is not working any more. What I've done so far:
- Firewall "FTP server passive ports" is active
- Diagnosis and repair for FTP does not show any problems (check in web UI and CLI)
- Components -> Web hosting -> ProFTPD is installed
- Can't find anything in the logs

Where else could I check for Issues?
Any help where to look would be highly appreciated.
Thank you!

 

[bechtoldster]

Tried this now without success:
- Turned of Firewall
- Turned of Web Application Firewall

 

[bechtoldster]

Maybe I should add, that our deployment in this case is done with lftp.

I have some progress. I set the connection mode in cyberduck to active and I can access the server.
Now I read that passive mode is usually disabled: (Plesk for Linux) Configuring Passive FTP Mode
Why did it work until now, then? Any ideas? What changed?

 

[bechtoldster]

Ok, the /etc/proftpd.d/55-passive-ports.conf is there, like in the article. So it should work.
By exporting the firewall rules, I was also able to confirm, that this is set up properly. I'm just wondering, why you can't just read the rules.

 

[bechtoldster]

Ok, so I found out, that IONOS moved our server to another data centre and changed the firewall rules. Activating 49152 65535 there, and it's working again.

I'm sorry for my rant earlier, this time it was not the Plesk update breaking things. How do I set this to resolved?

 

[Sebahat.hadzhi]

I updated the thread on your behalf. Thank you for sharing your resolution for the sake of other Plesk users hosted on IONOS who might come across a similar issue.