Re: sshd fun

[Roland McGrath <roland@frob.com>]

> Connection from  t with IP options: 8f 00 00 00 08 02 02 01 0c 02 02 01 10 02 02 01 e0 0e 02 01 90 67 08 08 60 0f 02 01 00 00 00 00 00 00 00 00 00 00 00 00 d8 5e 02 01 b8 01 02 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 8c 00 00 00 00 00 00 00 d8 5e 02 01 08 d8 29 01 c8 5e 02 01 Disconnecting: Corrupted check bytes on input.

This indicates a bug in pfinet.  If you can reliably reproduce this with an
easy recipe, then that is a step closer to finding that pfinet bug.

> Also, there is no problem at all if I just call a command on the server
> (eg: ssh otherhost cat /etc/motd).

This is not surprising.  We don't know why the pfinet bug arises in some
uses of TCP and not in others.  Different uses of a protocol like ssh will
send different amounts of data in different-sized chunks, and it is
probably some quirk of just what is going through that triggers the pfinet bug.