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Subject: Re: Bizarre network issue
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: law@dodinc.com
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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Date: 06 Oct 2002 00:27:24 +0100
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On Sun, 2002-10-06 at 00:10, Lawrence A. Wimble wrote:
> 1. ARP ... tcpdump shows both the request AND reply.
> 2. PING ... Getting approx 120ms round trip with the MHX-910s (23ms null 
> modem)
> 3. UDP ... Works perfectly with netcat in both directions.
> 
> Here's what *is not* working:
> 
> 4. TCP .... tcpdump shows the SYN packet, but no SYN/ACK ever appears
> 5. ICMP 3/3 ... If I try a UDP session when there's no-body "listening" 
> on that
>     remote port, no "Port Unreachable" message is ever sent back to the 
> sending host.

I'll take a quick guess. Your faked mac address has bit 0 of the first
byte set.


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