So, at least you will need something like iptables -t nat -A PREROUTING -i eth3 -p tcp --dport 80 -j DNAT --to 192.168.0.24:80 on the squid-box (default gateway). But then the question arises: Does HAVP support transparent proxying, like squid does ? If it does, then iptables -t nat -A PREROUTING -i ethx -p tcp --dport 80 -j REDIRECT --to-port 3127 should do the trick. (I do NOT think, that iptables -t nat -A PREROUTING -i eth3 -p tcp --dport 80 -j DNAT --to 192.168.0.24:3127 will work. Because that would not be a "standard" transparent proxy setup.) -- View this message in context: http://squid-web-proxy-cache.1019090.n4.nabble.com/Securing-squid3-tp4658495p4658504.html Sent from the Squid - Users mailing list archive at Nabble.com.