Andrew Reilly wrote:

> I ran a script using jot to send ping packets across the link, with
> sizes varying from 1300 to 2300 bytes, while also watching the link with
> tcpdump.
> 
> Only one ping failed (it didn't even get out), with the following error
> message:
> ping: sendto: Message too long
> 
> I also saw a few "ip reassembly time exceeded" messages in tcpdump, but
> I'm not sure whether they were correlated.
> 
> Most of my problems seem to have gone away when I added "add allow all
> from any to any frag" to my firewall script.  Not sure how it ever
> worked at all without that, though.

Mind posting the IP addrs? I'd like to send you a few frags. ;-)

Seriously,  that's a workaround that wouldn't be acceptable here.

I've noticed problems with some servers out *there* on the net,
which send large TCP packets with DF set, but seemingly ignore
the ICPM NEED FRAG error response.  Ack.  Pppt.


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