Previously I had rutx12 - that worked fine - no DNS issues.
Then I got the rutx50 - DNS issues appears. Ping ok, and Rutos internet status indicated - offline… Never solved that issue.
Now I have a flagship product 2 x 5g RUTM52, and same DNS issue is there. Out of the box 4 RUTX10 wifi routers in my LAN backbone - internet status offline. Didn’t test the hosts file tweak yet.
nslookup shows that main router with 2 pieces of 5g, is named in correctly. Even it is not! :
— 192.168.xxx.x ping statistics —
3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max = 0.793/0.862/0.923 ms
admin@RUTX10-2House:~$ nslookup 192.168.xxx.x
Server: 127.0.0.1
Address: 127.0.0.1#53
x.xxx.168.192.in-addr.arpa name = RUTX50.lan
IT REALLY IS RUTM52 !
What to do ? ideas any one. Is there way to flus etc the DNS cache ?
You’re dealing with an internal DNS caching/misreporting issue across your Teltonika RUT devices. It sounds like old DNS records (likely from when the RUTX50 was on the network) are being cached somewhere, leading to incorrect reverse DNS resolution (PTR) records and potentially impacting the perceived internet status in RUTOS.
thanks. Trying to work on that and created host files for all of them. One of them says still RUTX50. Changed that. And dbl cheked all host files. Now they are correctly in all RUTX10. RUTM52 is online normally. and dns names are viewable for all network devices. Except RUTX10 routers 3 peaces and 2 Tsw swiches.
Trying to figure that out…
Also RUTX10 wifi routers can reach to internet, but UI’s feature ‘internet status’ is still offline. RMS is not reachable. These indicates that DNS is still messed up - cache or not. I’ll try to findout how to wipe DNC cache manually etc…
No luck with dns cache flush yet.
I tested nslookup one of the RUTX10 routers. Ping with ip ok, with name no go:
STILL WRONG NAME IN DNS!!! All hostfiles are checked!
root@RUTX10-2House:~# nslookup RUTM52
Server: 127.0.0.1
Address: 127.0.0.1#53
** server can’t find RUTM52: NXDOMAIN
** server can’t find RUTM52: NXDOMAIN
root@RUTX10-2House:~# nslookup RUTM52.lan
Server: 127.0.0.1
Address: 127.0.0.1#53
To better understand the situation, could you please clarify how the RUTX10s, RUTX50, and RUTM52 devices are connected? Is your network operating in a bridged (Layer 2 bridge) configuration, or are these routers functioning as separate routed segments?
If possible, could you provide a simple topology showing how the devices are linked together, along with their assigned IP addresses? That would be really helpful and appreciated.
Additionally, could you share the output of the following command from the devices that are having trouble resolving hostnames?
cat /tmp/resolv.conf.d/resolv.conf.auto
This will let us check which DNS servers are being actively used by each device.