In message <19991222211929.5761.qmail@picarefy.picarefy.com>, jwbirdsa@picarefy
.picarefy.com writes:
>   Changing three lines of code causes NetBSD to stop generating or responding
>to the IP timestamp option, and that completely resolved the TCP stalling
>problem that I was seeing. I still have no idea why timestamps were causing
>trouble, and I don't have the knowledge to pursue it any further, but mostly
>I'm surprised that nobody else has seen this. Among other symptoms, I was
>completely unable to send email to Hotmail.

This is a common complaint; you might try disabling rfc1323 support.  I've
seen this come and go a few times; apparently there's dispute over whether
or not timestamps are "correct" in the BSD TCP stack.

-s