iptables -t nat -A PREROUTING -p tcp -s 192.168.0.0/16 --dport 80 -j DNAT --to 192.168.0.1:#[port]#
These settings configure the access method to your own http proxy and server. All traffic is routed through one single port, for both proxy and server.
Server Access Restrictions You can restrict access to this proxy/server with an IP-number filter:
You probably don't want to share the proxy to the internet, so you should set the IP-Number Access Domain to a pattern that corresponds to you local intranet. The default setting should be right in most cases.