Hi Everyone, Can any one shed some light on this problem. I have an ispconfig system ip 192.168.2.4 on a DMZ network. Access between normal network 192.168.1.x and the DMZ works fine. I have created a website - enabled php + mysql (not php safe mode) and all works fine. I have installed squirrelmail 1.4.5 which work fine both internal (I set my windows hosts file to point to the domain name and not the ip address e.g 192.168.2.4 www.myhost.com) and from the web. (outside my network) I also installed uebimiau mail as well (2.7.2) now this works fine internally, but when trying it from the web, for example trying to read an email it times out. Also I installed Xoops 2.2.3a again this works fine from inside my network, but I see funny things happen outside, for example I can login as admin, but cannot get to the admin page, it times out, and also I get a mysql error at the bottom of the page (Warning [Xoops]: Smarty error: unable to read resource: "db:system_block_online.html" in file class/smarty/Smarty.class.php line 1084) but I dont get any errors and can see the admin page from the internal network. I checked the apache logs and the only message I could find was this : [error] an unknown filter was not added: PHP I don't understand why it all works from the lan to the DMZ but from the outside world to the webservers it's not working. I should also mention here I'm using centos 4.2 which comes supplied with php4 and not 5, but I set the /etc/httpd/conf.d/php.ini as according to instructions on the FC4 build. Suggestions please? Thanks. Keith.