This is a weird one. I'm an experienced Linux admin and network engineer, but this has me stumped. I installed VMPlayer on an HP DL140 running RHEL 4 and installed the Joomla appliance and set up bridged mode with its own new public IP. All worked very well, including the registration. I turned on SSh and can get into the box from anywhere on the Internet through both the Web and SSH interfaces.

I then ran apt-get update to refresh the app list, and it couldn't reach any archives. I soon discovered that all outbound connections seem to be blocked from this VA. Bi-directional traffic works fine but session initiation, outbound ICMP, and outbound UDP appear blocked. I put a sniffer on the DL140's ethernet port and the packets are not making it to the wire.

My RHEL installation is not running a firewall, but something seems to be firewalling outbound connection from the VA. Outbound connections from the physical box are fine. I've verified the subnet mask, IP gateway, and all other network settings. I've confirmed that there is no duplicate IP on this Ethernet segment.

I'm baffled. Is there some kind of firewall built into the appliance?

-mel