Secondary DNS question...

[Doug Barton]

Interesting, the pcap that was posted previously showed some odd errors 
around udp checksums, some showed valid, some showed invalid. With 
modern NICs it's not uncommon to see them all invalid due to checksum 
offloading, but the mix of valid and invalid was odd.

Doug


On 06/26/2013 09:58 PM, SH Development wrote:
> I am running a demo of the Canit anti-spam software from Roaring Penguin Software as an appliance (ISO) inside of Virtual Box for OSX.  I was getting a lot of these errors in the system logs:
>
> 6/26/13 11:38:37 PM	kernel	in_delayed_cksum_offset: ip_len 48640 (190) doesn't match actual length 204
>
> Shutting down Virtual Box stops the erros.  So, until I figure out why that is happening, I'll just let everything fail over to my secondary MX spam solution.
>
> Very interesting.  Now will have to do some research on the error as it pertains to Virtual Box.
>
> Jeff
>
>
> On Jun 26, 2013, at 11:53 PM, Doug Barton <dougb at dougbarton.us> wrote:
>
>> Yes, seems fine now. Can you share more information about what it was you turned off? Sounds odd, but the results speak for themselves.
>>
>> Doug
>>
>>
>> On 06/26/2013 09:39 PM, SH Development wrote:
>>> Sure could use some direction about where to start looking.  I "thought" I had everything working for the last few years, but now I'm beginning to question how long I've had a problem.
>>>
>>> The setup is OSX running BIND 9.9.3-P1 on a static IP, no firewall, no router, just straight to the internet.  I am also serving Apache and ProFTP on the same box.
>>>
>>> As a thought, I have had some strange errors in the console log, I think they are coming from a spam solution I am running.  I'm shutting it down temporarily. Wonder if it could be corrupting the network.  @Doug, could you try your test again now, now that I've shut off the potentially offending program?
>>>
>>> Jeff