[SOLVED]Forbidden error for certain articles

[aph]

I get the following error:

Code: Select all

Forbidden You don't have permission to access /otrs/index.pl on this server.

However this occurs only when I want to see a certain article in the ticket. The article types where it occurs aren't consistent either. For example, one of the notes I can see, but when accessing the other one, I get the forbidden error.
Any idea what the problem could be. I do not see anything relevant in OTRS log.

[RStraub]

And the apache log ?

[crythias]

Check permissions, especially cache. Also Apache error logs.

[aph]

The problem was that the firewall was blocking the access due to the contents of the ticket.