Sorry, took me a bit to get back to this...

"Server: Microsoft-IIS/4.0" makes it look like the error is indeed coming directly from the MS Proxy but I searched the access logs anyway for Apr 14 and 15 [ just in case it took you a few hours to get around to posting (: ] and there were no instances of "zbyparameter" (so it is MS Proxy complaining).

I'm curious if an extra or missing "\r" is the culprit. I'd think an MS proxy would be tolerant of such things but I also know that some of their code isn't. I'd probably use "perl -d" to experiment with binmode and/or adding/removing "\r" to what is sent to the proxy.

You could also get one of the Perl-only HTTP proxies (such as HTTP::Proxy) and use it to see exactly what the proxy receives.

                - tye

In reply to Re^3: LWP::UserAgent on cygwin and Microsoft Proxy (more data) by tye
in thread LWP::UserAgent on cygwin and Microsoft Proxy by zby

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