Internet connection is good, but connectivity test and connection test FAIL

I haven't been aware of any problems with this Untangle box except that it fails two tests. Now that I'm having some problems setting up an ftp server on the LAN behind the Untangle box, it seems like maybe I should try to understand these test failures.

Here's the troubleshooting info:

On the Untangle server

Under config->network->troubleshooting:

Use the connectivity test, Does it succeed? DNS good, TCP failed
Using the ping test, can it ping Untangle's gateway? Yes
Using the ping test, can it ping 8.8.8.8? Yes
Using the ping test, can it ping google.com? Yes
Using the connection test, can it connect to google.com port 80? No:



On a client behind untangle

Can the PC ping Untangle's internal IP? (doesn't apply for bridge mode) Yes
Can the PC ping Untangle's external IP? Yes
Can the PC ping Untangle's gateway? Yes
Can the PC ping 8.8.8.8? Yes
Can the PC perform DNS lookups? (Open a command window and run 'nslookup google.com' or 'host google.com') Yes for 'nslookup google.com', not sure how to use the 'host google.com' command
Can the PC ping google.com? Yes
Can the PC open a browser to google.com? Yes
Can the PC open a browser to Untangle's internal administration interface? Yes

On a machine outside the network (if available)

Can the machine ping Untangle's gateway IP? Yes
Can the machine ping Untangle's external IP? Yes
Can the machine open a browser to the https administration on Untangle? No

Any help greatly appreciated.

Thanks!

Frank