Regards from Madrid, Spain.
I am configuring a Iptables firewall on the office, but i have problems with the navigation from LAN to Internet.
My configuration is the next:
- eth0 --> LAN Interface
- eth1 --> WAN Interface
I enter the next command:
iptables -t nat -A POSTROUTING -s 10.10.12.30 -o eth1 -j SNAT --to 62.93.44.116
The configuration results:
=====================================================
Chain PREROUTING (policy ACCEPT)
target prot opt source destination
Chain POSTROUTING (policy ACCEPT)
target prot opt source destination
SNAT all -- 10.10.12.30 anywhere to:62.93.44.116
=====================================================
Chain FORWARD (policy ACCEPT)
target prot opt source destination
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
=====================================================
IP_forward --> 1
=====================================================
All policies are in ACCEPT position, but it doesn't works.
/proc/sys/net/ipv4/ip_forward = 1
When i do a simple ping test from LAN --> Internet, it fails, but if i repeat the same test from firewall, it does ok.
IP_LAN -------(ping)--------> IP www.cisco.com = Not OK
Firewall -------(ping)--------> IP www.cisco.com = OK
Anybody can help me?
P.D: I know it. My english is not very good. :D
