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Date: Thu, 09 Nov 2006 18:42:18 -0800
From: Chris <cdtelting-ml@comcast.net>
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Subject: TFTP Problems
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I'm still trying to figure out why the standard tftp won't accept ack 
connections from 0.0.0.0.  It will recv ack's from a normal IP address 
just fine.

It can't be the firewall because I can set it to "pass all" and restart 
with the same results.

The tftp daemon is started from inetd.  The server process is somewhat 
different for a inetd daemon as it recieves on socket 0 instead after it 
starts.  It creates a socket for further communication after it retries 
the initial UDP packet sent.  It sucessfully sends the first packet on 
this socket but it doesn't recv ack's for the packet though tcpdump 
see's them come in.  The recv timesout and then it resends the first packet.

The only thing I can think of is that inetd must initialize it's sockets 
in some special way to recieve from 0.0.0.0.


Chris