I am facing a strange state in Mikrotik related to DNS configuration

RouterOS General
1

Hello everyone,

I’m facing a strange issue on my MikroTik network in the ISP and need some help troubleshooting it.

Problem:
Clients are getting “Connected, No Internet” / “Connected without Internet” messag, even though everything appears to be working normally. the issue happens on a randome interval, could be a week or more. not often or daily basis. also apps working on we face browsing issue on every kind of platform(android, windows,…).

most important thing while loggged in to router, device is jammed overall or just the IP DNS part is jammed. and can’t reset the open dns addresses that we use.

after a while maybe 5 minutes issued becomes solved on its own.

I have dns redirection configured on my router for my clients both tcp and udp roles written.

I also written some rules to filter out reqs to be accepted only for my clients subnets.

Current Situation:

  • Upstream internet is normal, latency and etc.

  • Ping to public IPs (like 8.8.8.8) works

  • DNS seems mostly fine

  • MikroTik CPU/RAM usage is normal

  • No packet loss found in basic tests

  • WAN interface stays connected

  • What I already checked:

  • DNS configuration

  • Gateway reachability

  • NAT masquerade rules

  • Firewall rules

  • Environment:

  • Router: MikroTik

  • Client every one every platform.

  • ISP connection stable

  • No major bandwidth saturation

Has anyone experienced this before?
Could this be related to what.

let me know extra information required.

Any suggestions on what else I should check would be appreciated.

Thanks.

2

If you continue with the attitude from your previous thread (DNS redirection sometime doesn't work - RouterOS / General - MikroTik community forum), you won't receive any help.

You should do as people already told you in that thread and post an export of your configuration.

3

I already told you the solution in the other topic.

image

Just looking at the image, you can see the bulls~~it of redirecting requests from port 853 to port 53, and with "redirect"...
That alone is a sign of someone who doesn't know how to configure the device,
and the rest of what he wrote indicates a more rude person than this response.
DNS redirection sometime doesn't work - #10 by rextended

Study how the protocols are structured and remove those "dirty" rules.

4

Also, reading other threads depending on the config and version and if folks are using iphones, there are connection issues.