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Forum Discussion
Solved
R8000 Router Ongoing DNS Issues
So the DNS resolution issues affecting the R8000 and seeminly other models are all over this forum. The last two firmware upadates (.74 and .76) are complete junk and completely break the DNS resolut...
I am seeing all sorts of DNS issues on the R8000 V1.0.4.76_10.1.82 (current version)
I don't know at what version this issue started.
When IPV6 is enabled, several workstations DNS does not work, but routing is OK as I can ping external IP's
Some workstations will be OK, other not.
I see delays in web pages opening
When IPV6 is disabled, some things are better, but some secure web pages like a banking bill pay will not open.
I also see delays when web pages try to open.
If I manually set DNS servers ie: 8.8.8.8 and 8.8.4.4 at the troubled host, it works OK.
Web pages open quickly, and the bank web site works correctly.
Here is my ipconfig of my host with V6 disable, showing IPV6 addresses are still provided.
Ethernet adapter Ethernet:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel(R) 82579LM Gigabit Network Connection
Physical Address. . . . . . . . . : B8-CA-3A-A7-3F-2D
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : 2002:4353:7b0b:0:90f9:e3b5:76f8:c02e(Preferred)
Temporary IPv6 Address. . . . . . : 2002:4353:7b0b:0:688d:b789:c7b0:1fb(Preferred)
Link-local IPv6 Address . . . . . : fe80::90f9:e3b5:76f8:c02e%9(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.15.160(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Monday, February 07, 2022 8:12:16 AM
Lease Expires . . . . . . . . . . : Tuesday, February 08, 2022 8:12:15 AM
Default Gateway . . . . . . . . . : fe80::9e3d:cfff:fe48:57f6%9
192.168.15.254
DHCP Server . . . . . . . . . . . : 192.168.15.254
DHCPv6 IAID . . . . . . . . . . . : 246991418
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1B-33-E4-9A-B8-CA-3A-A7-3F-2D
DNS Servers . . . . . . . . . . . : 192.168.15.254
2002:4353:7b0b:0:9e3d:cfff:fe48:57f6
NetBIOS over Tcpip. . . . . . . . : Disabled
This verifies that the R8000 DNS forwarding is not working correctly.
As Others mentioned, IPV6 is not fully disabled when its disabled on the router.
- I haven't played with the IPv6 settings, but I don't understand why that should either help or cause issues. My provider doesn't use IPv6 addresses yet so I don't see the point in turning it on.
My only working solution is to manually set the DNS servers on each connected client, which is completely impractical for some clients. Setting the DNS servers on the router had no effectHi,
The router is basically brokering all DNS lookups (DNS forwarder)
Since recent firmware updates, IPV6 seems to be interfering with IPV4, even when IPV6 is disabled on the router.
Although IPV6 is not fully used yet, it is active.
most OS's have this enabled by default.
Even after a full reset of my R8000, I am still seeing some issues with DNS.
However the GUI now shows that IPV6 is disabled, where it wouldn't change before the reset.
