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From: Oliver Lehmann <lehmann@ans-netz.de>
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Subject: Re: migration diablo-jre openjdk-jre
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I think I found the problem, but not what is causing it.

diable-jre sends out the data using my interface re0, and the address  
"10.0.0.23".
openjdk seems to send out the data somehow through my tun0 interface  
with the address
"10.0.0.23". This of course is complete nonsense. My firewall blocks  
this traffic:

Jan 31 14:29:31 gurke kernel: ipfw: 6004 Deny UDP 10.0.0.23:33104  
239.255.255.250:1900 in via tun0
Jan 31 14:29:35 gurke last message repeated 9 times
Jan 31 14:29:46 gurke kernel: ipfw: 6004 Deny UDP 10.0.0.23:33892  
239.255.255.250:1900 in via tun0
Jan 31 14:29:50 gurke last message repeated 9 times
Jan 31 14:30:10 gurke kernel: ipfw: 6004 Deny UDP 10.0.0.23:20827  
239.255.255.250:1900 in via tun0

tun0 is my PPP device to the "outside" world - no idea why it is  
picked up. The program
itself also outputs that it is using the right interface:

[main] INFO  14:37:18.681 Scanning network interface re0 / re0
[main] INFO  14:37:18.695 Using forced address 10.0.0.23
[main] INFO  14:37:18.699 Created socket: /10.0.0.23:5001
[main] DEBUG 14:37:19.367 Sending ALIVE...

Incoming data on my PPP interface from a jail on the same host this  
is.... wow - crazy ;)


relevant truss output for diablo:
http://pastebin.com/RLiFBZTa

relevant truss output for openjdk:
http://pastebin.com/WHZnKnAS