Hi there all im looking for a manual to build a reverse proxy server from linux to serve the microsoft exchange server that im using if anybody can help ? thanks
have you checked squid's webpage ? http://wiki.squid-cache.org/ConfigExamples#Reverse_Proxy_.28Acceleration.29 however if just need a simple reverse proxy like external (public) server to serve content from an internal (firewalled exchange server) you can just use apache's mod_proxy , check out the documentation on the apache website or here with some examples http://www.apachetutor.org/admin/reverseproxies
nginx is another option: http://planetit.ws/linux/debian/configuring-nginx-based-reverse-proxy-for-owa.html