I've this schenario
----------------- ---------------- ----------
| SERVER A | ---(port:2128)> | PROXY | ---> | INTERNET |
| (10.30.1.1) | | (10.30.2.2) | -----------
----------------- ----------------
Now I've a SERVER B (10.31.1.1) who can not access to PROXY, bu can access to SERVER A
What I need is to configure SERVER A to accept request from SERVER A an forward them to PROXY so it can reach internet..
I tried via iptables in this way:
echo "1" > /proc/sys/net/ipv4/ip_forward
iptables -A FORWARD -p tcp -i 10.30.1.1 --dport 3128 -d 10.30.2.2 -j ACCEPT
iptables -t nat -I PREROUTING -p tcp -i 10.30.1.1 --dport 3128 -j DNAT --to 10.30.2.2:3128
but on SERVER B i got
Unable to connect to 10.30.1.1