Unable to connect via FTP

Ok, well thing is... if you used the codes above, you unlikely used passive mode, or did you?
Looks like too few ports or an issue with the firewall in general still .

 

Yeah I specifically used

Code:

For explicit TLS / SSL:
set ftp:ssl-force true
connect ftp://ftp.domain.tld

I'll play around some more with the firewall settings on the provider side I guess

 

I meant, please try passive mode on the server, too =)
Good luck!

 

Ah lol apologies. Just tried with passive mode on and I was able to connect just fine and list dirs as well

Code:

lftp :~> set ftp:passive-mode on
lftp :~> set ftp:ssl-force true
lftp :~> connect server.com
lftp server.com:~> login user
lftp [email protected]:~> ls
drwxr-xr-x   11 0          0                4096 Apr 25 14:43 .
drwxr-xr-x   11 0          0                4096 Apr 25 14:43 ..
drwx------    2 5016       client6          4096 Apr 25 01:28 .ssh
drwxr-xr-x    2 0          0                4096 Apr 25 01:28 backup
drwxr-xr-x    2 5016       client6          4096 Mar  4 18:30 cgi-bin
drwxr-xr-x    3 0          0                4096 Apr 25 14:43 home
drwxr-xr-x    2 0          0                4096 Apr 27 00:08 log
drwx--x---    2 5016       client6          4096 Mar  4 18:30 private
drwxr-xr-x    2 0          0                4096 Apr 25 02:24 ssl
drwxrwx---    2 5016       client6          4096 Apr 25 01:28 tmp
drwxr-x--x   15 5016       client6          4096 Mar  5 17:02 web

 

So I completely disabled the provider firewall and retried with filezilla and winscp and was still unable to connect...

To confirm the firewall was actually disabled, I accessed the ispconfig portal from a different IP and it loaded up just fine.

 

Really strange. And even harder to debug ugh.
Usually I'd setup a virtual network with some VM at home and use some snapshots of whatever is broken.
If that works, it could be a "hidden" firewall or anti ddos implementation gone wrong or whatever imagination can offer :/
A plus for a local lab is, one could watch the local ufw firewall ( which I assume is enabled ) and check if some drop / reject counters increase ; but with a machine on the internet, they always will.

Even found (1) something on the net where it is claimed a
update-ca-certificates --fresh

is part of the solution, though I have a hard time beleiving it, I can not say it's invalid to give it a try.


(1) https://askubuntu.com/questions/150...sues-on-ubuntu-22-04-issues-with-dell-library