This answer may be OT as well, but your post rang some bells.

I had a similar problem once. I couldn't submit large forms from home to a basic perl script of my own creation, but I could submit to the same script from work and elsewhere with no problem.

The issue turned out to be -- and I do not know much about networking so excuse my summary here -- an MTU (network maximum transmission unit) setting by my DSL provider, SBC/PacBell, at their upstream routers conflicting with the MTU used by Windows 2000 and my router. I think what was happening is when I submitted large-ish forms my computer/router was sending packets larger than SBC's MTU, which were promptly dropped on the floor, never reaching the server.

Setting my Linksys BEFSR41 V.2 4-port DSL Router/switch to fragment my packets (when neccesary) to fit into, as it turned out, 1460 (bytes?), fixed the issue. The router now breaks up large packets into smaller ones so they do not exceed SBC's MTU and get dropped on the floor.

The whole thing is documented in this usenet thread.

In reply to Re: May be OT: Can ad blockers truncate POST data? by ryantate
in thread May be OT: Can ad blockers truncate POST data? by dws

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