I have configured FWSM to firewall my serverfarm. On the server farm i have different servers running different OS platforms. I have experienced difficulties with servers running linux/unix OSs.For a start i have allowed all IP and ICMP traffic to and out of the serverfarm VLAN for testing. I can pass traffic on all Windows platforms but not the linux ones. I have correct gateway addresses configured and NAT0 configuration. What do i need to do to pass traffic successfully.