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I recently posted a question regarding the inability of a MASQed Win98
machine (via Red Hat 6.2 gateway) to ftp and occasionally web surf.  Thanks
to the help of this list I was able to determine the problem was caused by
receiving packets larger than the mtu of the link from the Win98 to the
gateway (1400) that had the dont fragment bit set in the TCP header.  My
Linux machine generates an ICMP packet notifying the sender that the packet
was too big, which the sender blithely ignores.  Please let me know if this
is beyond the scope of this discussion list, but I have a few questions:

1)       What reasons are there to set the dont fragment bit other than
mtu route discovery?
2)       Would it be safe to ignore this bit and fragment anyway?
3)       Is there another method to inform the packet sender of the reduced
mtu?

I have noticed several grumblings in the archives about similar problems but
I couldnt find any definitive answers (other than increasing the mtu, which
I am not able to do).  If someone could point me in the right direction it
would help tremendously, thanks

Andreas M. Camacho
Software Engineer

[EMAIL PROTECTED]
(707)792-5390 X15

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