> BTW, NetBSD could do path-MTU discovery, but it is off by default.
> Avoiding problems with misconfigured firewalls is no doubt one reason
> its still off.  (Routers that don't send back icmp's for packets that
> they need to fragment but aren't allowed to might be another more
> minor problem.  Are there still any out there that have this
> lossage???)

I know that at least one large corporate network had these messages
turned off for quite some time because the ICMP fragmentation needed
error messages allegedly wound up breaking older legacy systems...

					- Bill