I Have design the dataCenter where internal users are browsing intrenet via proxy Server. This Proxy Server now in Inside behind the Firewall and Browse are through nat in FW. Now I want SetSup Web cache Engine. SO what is the best Practise to placemant Web Proxy in behind inside the Firewall or DMZ Zone in Firewall ?. If I put in DMZ zone then every time packet path will be turn to inside to DMZ. IF I put Web Cach Engine or Proxy Server in Inside Internet Firewall then have any risk ?. Pls give your valuable comment.