Sonicpoints

djhurt1

Sonicpoint clients receive our internal DNS address and can ping that address fine so a routing issue doesn't appear to be the cause. However, non domain joined devices can't resolve local names. Domain joined devices can. I considered something was up with our DNS regarding non domain joined devices however I can resolve names on the wired network behind the sonicwall with a non domain joined PC fine. Is there anything regarding the sonicwall to cause this behavior? It's only affecting our wireless clients.

Saravanan

Hi @DJHURT1,

Thank you for visiting SonicWall Community.

If the non domain clients can resolve domain names using your internal DNS server, then we should perform a packet capture on the SonicWall to trace the DNS and PING traffics. Packet monitor tool on the SonicWall can give us a clue of where the packet drop happens.

https://www.sonicwall.com/support/contact-support/

Please give this a shot and update me.

djhurt1

Below is what I saw that looks suspicious possibly. I used my phone and did repeated DNS lookups. However the Src 2c:b8:ed:4f:09:da is not my phones MAC but the Ip address is what my phone currently had for an address.

Ethernet Header

 Ether Type: VLAN ID = 500, Priority = 0

 Ether Type: IP(0x800), Src=[2c:b8:ed:4f:09:da], Dst=[c2:ea:e4:cc:3a:ab]

IP Packet Header

 IP Type: UDP(0x11), Src=[10.44.6.50], Dst=[10.44.6.1]

UDP Packet Header

 Src=[25554], Dst=[53], Checksum=0x44cc, Message Length=48 bytes

Application Header

 DNS: 

Value:[1]

DROPPED, Drop Code: 726(Packet dropped - Policy drop), Module Id: 27(policy), (Ref.Id: _2251_rqnke{Ejgem) 1:4)

Saravanan

Hi @DJHURT1,

I guess, the packet is dropped by the SonicWall because of access rule not allowed. You can check for the Src MAC address in the ARP section on the SonicWall to find out which device it belongs to. The MAC address keep changes every hop, so we may not see the right MAC address if there are hops in between. Please check the MAC or ARP table on the SonicWall and let me know if you can narrow down.