if zone alarm looks like the red and green are on full
boar then check your connections.
You may find that your ip is both a source and
destination ip routed through xolox.

Get the loop.
Try removing your ip from hostlist or get another host list.

I have posted this a few times before.
Does anyone disagree with me that this is possible.

I actually saw it happen before my very eyes.. I could
think of no other explanation for what I saw.

It would also eventually exclude all other network traffic
until my isp would logically sever my connection after not
receiving any response from my computer for some time.