*i have lately installed SQUID proxy and to avail all the facilities i am using it as Proxy mod not as Transparent mode neither i wanted to.
now the problem part is i want to ping outside host to verify the connectivity of internet for that all the time i have to open the SSH the console and ping. but what i want is, i should also ping it from host computers as well. however i don't want to NAT all the traffic coming from inside and going outside. rather what i want is just to NAT only ICMP Echo Rep and Req so that i can at least ping outside host with out SSH the Squid console. which is very bothering.
My network diagram is very simple
<Squid Box>--------eth0(18.104.22.168)----------------------<192.168.30.1-ISP Router>
** eth1(192.168.1.1) **
** (local network 192.168.1.0/24)
And why i am using Squid as a Gateway because i just want to minimize unwanted nods that needs to be monitor all the time and batter control over traffic with IPtables firewall. i am using this line to NAT very specific ports to allow certain facilities like Email , Remote desktop and stuff. and this is working for me.