403 Forbidden error on new posts?

[Jikesh]

Hello,
I recently updated my forums from 4.2 to Version 4.2.2

The upgrade went all smooth without any issues or error.

After few weeks our users started to notice a bug with our forums.

Issue:

When some users try posting a new thread in some sections of the forums they get a 403 Forbidden error.
This happens to 50% of users and at different section of forums. It randomly appears. Like for me the Administrator of the forum it seems to be working fine but, for normal users - they always seem to face this issue.

Any help would be appreciated.

Many thanks!

[adbn]

What kind of user get that problem? Have you created a new normal user to test? We need more infomation. Could you provide your forum link?

[donald1234]

403 forbidden is a server issue, check your permissions

[Jikesh]

403 forbidden is a server issue, check your permissions

My newpost.php permissions and other files/folders permissions are definitely correct.

[Jikesh]

Still waiting for answers...

forum/newthread.php?do=newthread&f=205 ---> Sometimes gives 403 error (90% of the times)

newthread.php --> has 644 file permission

[Lynne]

Do you have suhosin or mod_security on your site? Is there anything in the error_logs (if you don't know where they are, ask your host) when this happens?

[Guido64]

After installing a new fresh VB4.2.2 and importing my "old" phpbb3 and started the "General update tools" I also got 403 not permitted problems. I searched like crazy all evening and tested all found and suggested fixes nothing semed to help. Till I disabled mod-evasive with "a2dismod mod-evasive" and restarted apache this solved for me the problem. This might help someone.