Resolved normal behavior? [Why is my domain redirected to the Plesk login page?]

[LionKing]

Server operating system version

Linux Ubunto 22.04

Plesk version and microupdate number

Plesk Obsidian Web Host Edition Version 18.0.57 Update #5

So today I was working with adding some new national LTD domain names for our company and was at google webmaster finalizing stuff when I saw that there was a URL/ page that had trouble with being indexed and I reacted to it because it is not something we have added in DNS or elsewhere in itself but we do use * wild card domain too.

Basically its
https://m.domainname.co,uk login_up.php
which makes the Plesk login page load and I found that to be a bit strange.

You can also use some garbage text like (Doesn't matter what you put there) https://dsdjhfdfd.domainname.co,uk/login_up.php and it will still work and load the Plesk login page interface.

Now the question here is obviously if this is normal/normal behavior by Plesk and if so - how to disable it?
We like to keep the login page for Plesk/ our server a secret for security reasons.

If not normal (knock on wood) - but potential malicious activity - then what should we look for to remove this?

Thanks in advance.
Kind regards

 

[LionKing]

Actually you do not even need the "/login_up.php" at the end of the URL. You just need to type something/some letters in-front of the root domain and you will be redirected to the Plesk login. Seems a bit strange to me.(?)

Kind regards

 

[LionKing]

I think (?) I found the culprit of the issue.
In Plesk settings Plesk was configured to access any address:


If I'm correct then this is what caused the issue.

Kind regards

 

[Kaspar]

I think (?) I found the culprit of the issue.
In Plesk settings Plesk was configured to access any address:
[IMAGE]
If I'm correct then this is what caused the issue.

Yes.

 

[LionKing]

Yes.

Thanks for confirming this @Kaspar!
I got me bit worried for second or two.