On Tue, 1 Sep 2015 16:48:45 -0700 Tom Eastep <[email protected]> wrote:

> The dump shows no conntrack entry for the broadcasts; yet it appears
> that steam is running.
> 
> Interestingly, one packet has matched the DNAT rule -- I would have
> thought that your loc->loc rules would have been the correct one if
> steam is running in the steam netns. Did you inadvertently run steam
> outside that netns since Shorewall was restarted.

I ran Steam under netns when testing, but sometimes I ran it normally when not 
testing.
Today I ran Steam under netns and it sent correct broadcast:
346   6.393202 192.168.1.11 -> 192.168.1.255 UDP 136 Source port: 27036  
Destination port: 27036

Then I ran Steam normally and then again under netns, and broadcast became 
wrong again:
12562 502.839578 192.168.1.11 -> 5.20.215.255 UDP 138 Source port: 27036  
Destination port: 27036

So it seams Steam somehow caches incorrect broadcast address.
After some time broadcast became right again.

But now another problem - Steam sends correct broadcast, but the client PC does 
not see it.
tshark -i wlan0 -Y "tcp.port == 27036 or udp.port == 27036" on the client does 
not show any output,
while the sniffer on the sending PC shows outgoing broadcasts. What could be 
wrong?

Regards,
Nerijus

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