Score:0

Not able to access server from specific other server

pt flag

I'm running a VPS with Ubuntu 18.04.6 LTS (GNU/Linux 4.15.0 x86_64) accessible with example000.com.

Since some hours I'm suddenly not able to access this server from my other server example111.com.

example111.com can neither access port 80 (webpage) nor port 3306 (MySQL) on example000.com.

Access with port 80 results to Internal Server Error. Access with port 3306 results to SQLSTATE[HY000] [2002] Connection timed out. Both take some time before I get the error message.

But I'm able to access both ports on example000.com from other servers.

It seems like example111.com (or its IP) is somewhere blocked on server example000.com.

But I can't find the IP blocked anywhere. /etc/hosts.deny is empty.

Is there any other place where example111.com could be blocked on server example000.com?

BTW: I do have SSH access.

in flag
Sounds like a MySQL failure, not a “block”. You’ll want to SSH into your `000` server and confirm the database is still operational.
David avatar
pt flag
@matigo How can I do that?
in flag
Connect to `000` via SSH and see if you can connect to MySQL. If it's running a modern version of Ubuntu, then you can use `sudo mysql`. If it's not running, then you'll want to check the logs in `/var/log/mysql` to see why the database engine is offline
David avatar
pt flag
@matigo I did and MySQL is working. Any other ideas?
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