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ccisco630
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Member since Sep 14, 2018
12-21-2018
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12-21-2018
10:26 AM
It appears that name resolution is being provided by all three configured, the internal DNS, 8.8.8.8, and the default-router for the subnet. Here is a sample of the Wireshark output on the uplink from the AP to the router. I got another flurry of those errors at 12:12-12:13, and that is all for the day thus far.
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12-21-2018
06:58 AM
Yes, clients get their DNS settings from the router over DHCP. The router's DNS config for that wireless subnet is 10.203.2.1, which is also that subnet's default-gateway/router. The router itself has a config line of ip name-server listing 2 internal DNS servers and 8.8.8.8 The AP is setup in Dashboard with the internal DNS first, and 8.8.8.8 second. I am able to ping the internal DNS from the AP in Dashboard, and name resolution does appear to be taking place, but I still get a flurry of those errors throughout the day. I really appreciate the help on figuring this out.
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12-21-2018
06:11 AM
On the AP I have an internal DNS server set as Primary and then 8.8.8.8 as secondary. That could be the case, as the router is the gateway for the AP, and has that gateway address (10.203.2.1 in this instance) in the DHCP scope for that subnet. But when I remove that DNS configuration or change it to the internal IP or 8.8.8.8 in the DHCP scope for that subnet, I can't get to any external or internal websites.
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12-20-2018
06:06 AM
Running a Meraki wireless network with a secure SSID for staff. The Meraki AP has an IP address on the secure subnet which is permitted on the WAN. For DNS we have the primary set to an internal DNS server and secondary set as 8.8.8.8, to satisfy both the Secure SSID and guest SSID name resolution queries. The DHCP scope on the router for the secure wireless subnet has a DNS entry of the default router for that network. In the router logs, I am seeing sets of these every day: 007515: Dec 19 10:07:15.439 EST: %DNSSERVER-3-BADQUERY: Bad DNS query from 10.203.2.2 007516: Dec 19 10:07:15.439 EST: %DNSSERVER-3-BADQUERY: Bad DNS query from 10.203.2.2 007517: Dec 19 10:07:15.571 EST: %DNSSERVER-3-BADQUERY: Bad DNS query from 10.203.2.2 007518: Dec 19 10:07:15.571 EST: %DNSSERVER-3-BADQUERY: Bad DNS query from 10.203.2.2 007519: Dec 19 10:07:15.627 EST: %DNSSERVER-3-BADQUERY: Bad DNS query from 10.203.2.2 007520: Dec 19 10:07:15.631 EST: %DNSSERVER-3-BADQUERY: Bad DNS query from 10.203.2.2 007521: Dec 19 10:07:16.615 EST: %DNSSERVER-3-BADQUERY: Bad DNS query from 10.203.2.2 007522: Dec 19 10:07:16.615 EST: %DNSSERVER-3-BADQUERY: Bad DNS query from 10.203.2.2 That is the IP address of my AP. What could be causing these errors? All is working as it should for staff and guest access, but would like to get to the bottom of these errors. Thanks!
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