I recently got a complain from my provider that one of my server is sending spam, I tried to search, but if I have to be honest I don't know where to start....
Centos5 on Plesk (Apache2, mail, ftp, mysql)
Probably the hacker take advantage of a PHP website.
I would like an estimation of cost/time to check the problem and fix it.
Also, if possible, I would like a separate estimation (cost/time) to make more secure an Ubuntu server (apache2, postfix, ftp, mysql, postgres).
We need somebody ASAP, we are located in central London(Goodge Street Station) let me also know when you'll be available to come over.