Last night I noticed my CPU utilization was at 98%, which is rare and seems unrelated to what I am presenting here, so I pulled up my logs.  It looks like for the past day or so I have the entries below.  They started at a low port number and are counting up on every entry.  Shutting down my VM's and Containers makes no difference nor does rebooting the whole system.  Any ideas out there?

 

Feb 8 07:36:09 unNutmeg avahi-daemon[1615]: Received response from host 192.168.1.1 with invalid source port 4339 on interface 'br0.0'

Feb 8 07:36:09 unNutmeg avahi-daemon[1615]: Received response from host 192.168.1.1 with invalid source port 4340 on interface 'br0.0'

Feb 8 07:37:48 unNutmeg avahi-daemon[1615]: Received response from host 192.168.1.1 with invalid source port 4340 on interface 'br0.0'

Feb 8 07:37:49 unNutmeg avahi-daemon[1615]: Received response from host 192.168.1.1 with invalid source port 4341 on interface 'br0.0'

Feb 8 07:39:26 unNutmeg avahi-daemon[1615]: Received response from host 192.168.1.1 with invalid source port 4341 on interface 'br0.0'

Feb 8 07:39:27 unNutmeg avahi-daemon[1615]: Received response from host 192.168.1.1 with invalid source port 4342 on interface 'br0.0'

Feb 8 07:41:05 unNutmeg avahi-daemon[1615]: Received response from host 192.168.1.1 with invalid source port 4342 on interface 'br0.0'

Feb 8 07:41:06 unNutmeg avahi-daemon[1615]: Received response from host 192.168.1.1 with invalid source port 4343 on interface 'br0.0'

Feb 8 07:41:48 unNutmeg avahi-daemon[1615]: Received response from host 192.168.1.1 with invalid source port 4343 on interface 'br0.0'

Feb 8 07:41:50 unNutmeg avahi-daemon[1615]: Received response from host 192.168.1.1 with invalid source port 4345 on interface 'br0.0'

Feb 8 07:41:51 unNutmeg avahi-daemon[1615]: Received response from host 192.168.1.1 with invalid source port 4345 on interface 'br0.0'

Feb 8 07:42:46 unNutmeg avahi-daemon[1615]: Received response from host 192.168.1.1 with invalid source port 4345 on interface 'br0.0'

Feb 8 07:43:09 unNutmeg avahi-daemon[1615]: Received response from host 192.168.1.1 with invalid source port 4346 on interface 'br0.0'

Feb 8 07:43:28 unNutmeg avahi-daemon[1615]: Received response from host 192.168.1.1 with invalid source port 4347 on interface 'br0.0'

 

The only thing I can find on the forums is this thread:

 

http://lime-technology.com/forum/index.php?topic=29841.0

 

In summary denzo suggests that:

 

 

The message appears to be an announcement rather than an actual response to a query.  In section 8.3 (Announcing) I found this paragraph: "A Multicast DNS Responder MUST NOT send announcements in the absence of information that its network connectivity may have changed in some relevant way. In particular, a Multicast DNS Responder MUST NOT send regular periodic announcements as a matter of course?."

 

So the "fix" was a firmware upgrade to the router

 

 

After some quick Googling it also appears that this LT post was referenced from Launchpad as a possible solution to a similar / same error:

 

https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/447442

 

Disclaimer: No idea really. Never seen the error before. Just trying to add some help!