I'm a bit of a novice so bear with me. I am looking for some advice and recommendations on how to restructure my companies network. We have 4 webservers, 4 sql servers, one domain controller, two mail servers, 15 local machines a VOIP PBX.
Our exchange server (used by internal employees) is running server 2003 and that makes me concerned about our network security. We also have an Imail server, and manage about 20 domains and 100 mailboxes. Right now we do not have any VLANS or a DMZ configured.
All of our machines are on one subnet behind a Cisco ASA (and two 24 port linksys switches). All of our workstations are on another subnet being the ASA (on the same switches.)
How would you suggest we restructure the network to increase security? There is a budget for new hardware so you can consider that also..
Thank you for your time and thoughtful replies!