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Plesk + Apache + PHP (FastCGI): Constant session permissions problems, conflicts between HTTP / HTTPS



I've just moved a collection of sites over to a brand-new server, running Apache 2.2.3, PHP 5.3, and Plesk 10.1.1. I am having problems with file permissions on PHP sessions, which are being stored in /var/lib/php/session.



I originally set the permissions like so for this folder:



drwxrwx--- 2 apache psacln 8192 Mar 22 23:25 session



This worked fine, for HTTP sessions. Files were being saved in that folder with these permissions:



-rw------- 1 client1        psacln 0 Mar 22 23:24 sess_507...
-rw------- 1 client2        psacln 0 Mar 22 23:25 sess_8o1...


The problem, however, is that PHP scripts accessed via HTTPS do not seem to be run by the same client1 or client2 user. I deleted files in the session directory and accessed a login page via HTTPS to see how sessions were being saved when initiated via this protocol:



-rw------- 1 apache         apache 0 Mar 22 23:25 sess_507...



So, for whatever reason, sessions initiated by clients browsing with HTTPS were being saved by apache:apache, while sessions from HTTP clients were saved with someclient:psacln.



What I'd like to ask:




  1. How can I avoid this problem with session permissions? When sessions are created via unencrypted HTTP and a client visits an HTTPS portion of the site, permission errors are shown, since apache:apache tries to access the session save created by someclient:psacln. The converse is also true.



    1. Can I change the user which runs the Apache HTTPS server, via Plesk or the command line?

    2. If not, can I have PHP sessions save with rw-rw---- permissions, and then add apache to the psacln group?

    3. Any other suggestions on how to fix this issue?



Answer



Change your /etc/php.ini file:



session.save_path = "0;0660;/var/lib/php/session"



PHP 5.3.5 mabe will save your session file as -rw-r-- if it does, then you need to edit your application, use the code instead only start_session():



usermod(0);
start_session();


then it will save the session files with -rw-rw-- permission.



You will also need to change your apache group to psacln (your server maybe running as apache:apache because some updated from apache has overwrite the config file).




Edit your httpd.conf



change from:



user = apache
group = apache


To:




user = apache
group = psacln


Now if you change from mod_php to FastCGI and back, you will not have conflict with your session permissions.



Don't forget to restart your apache server after the changes /etc/init.d/httpd restart



If you are using a debian distro, your daemon command will be /etc/init.d/apache restart and your config files will be inside a synonymous folder like /etc/php/apache/php.ini and /etc/apache/httpd.conf or /etc/apache/apache.conf



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