I have had the same exact problems and symptoms as richgill. See
http://forums.untangle.com/networkin...nectivity.html
I ran 2 tcpdumps
tcpdump -i eth0 -S -s 0 port 80 and host 192.168.1.55 (no packets captured)
tcpdump -i eth1 -S -s 0 port 80 and host 192.168.1.55 (packets captured attached)
Running Spyware Blocker, Web Filter, Virus Blocker, Intrusion Prevention, Protocol Control and Reports on Untangle 7.4. Average 1-min Load (0.03)
Also, completely reloaded Untangle box and symptoms persist.