I'm trying to allow a vender to connect to a Server inside our LAN to update software. The server is a (vmware) VM running CentOS 6.4 and has two nic cards configured (each on a virtual switch). One NIC is connected to our LAN 111.2 and the other is connected to the DMZ 112.2. I am using an ASA5505 running ASDM 6.2 and the ASA is 8.2. I have a NAT rule and Access rule set up to allow an outside IP from our ISP to link to our Servers DMZ IP but I can't ping the outside IP from the outside. I checked the firewall on the Server and icmp is configured to allow pings. From the Server I am able to ping the gateway of the DMZ and the other Servers on the DMZ (including it's own DMZ IP). We have another server set up the same way and I can be ping that server's external IP from the outside. What am I missing? Any suggestions would be greatly appreciated.