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Draytek 2568 serving DNS to Subnet behind a router on the LAN

  • mally.hubz
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29 Nov 2023 20:16 #1 by mally.hubz
Draytek 2568 serving DNS to Subnet behind a router on the LAN was created by mally.hubz
WAN
|
Draytek ---- Other Router ---- Clients B
|
Clients A

Hey. I can get DNS responses on Clients A to the DNS server on Draytek, but DNS requests from Clients B results in an ICMP Unreachable from the Draytek.

Routing of packets is fine, I can get DNS and Ping to/from 8.8.8.8 from Clients B, but it seems firewall / filtering on the Draytek prevents DNS. Anything I can do about this ?

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04 Dec 2023 12:41 #2 by pharcyder
Replied by pharcyder on topic Re: Draytek 2568 serving DNS to Subnet behind a router on the LAN
Have you looked at your Draytek's firewall rules to see if its blocking traffic to port 53?

Also, tell us more about this 'other router'. How's that configured? Double NAT? Is that blocking anything?

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