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I have Ubuntu 14 opening many UDP ports. The avadi_daemon was listed as the owner of the process (Using Netstat). I turned that off, but they then spawned with no owner. I can even kill the process and it starts again using another port.

I don't know what app is doing this. Is there any way to put some kind of check or rule that says before opening port check?

I am using ufw enabled.

Regards, Wesley

Wesley Davidson
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1 Answers1

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The documentation above provides good information. After using some investigation the dnsmasq had somehow configured itself to use two mdns servers. In addition, it looks like I had an uninvited guest.

Another interesting item, if you turn on ufw, you enable the mdns(adding the two mdns servers) and alter you iptables.

ufw -list iptables -L
then

ufw enable iptables -L.

I tested this on two of my Ubuntu Trusty Tahr 14 boxes.

Anyway, ufw modified iptables to allow comm to two mdns servers.

regards, Wes

Wesley Davidson
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