Need help diagnose access issue

RouterOS General
1

Hi All,

I recently found that my network is having a rather weird issue, that I cannot access [www.myq.com](http://www.myq.com), or to be precise 204.183.221.47 or 50.224.141.47. I get connection timeout from both.

I’ve already isolated ISP issue, that when I connect to Internet directly using my laptop’s ethernet port it works perfectly fine.

When I do a traceroute, the first hop (my router, RB4011 with newest ROS 7.3.1) will timeout.

I’ve tried to disable the firewalls, it did not help. Nor did I find and DROP rules rejected this packet (I have logs enabled).

As for context, I think this issue first occurred about end of 2021 or Jan 2022. It is probably related to me upgrading this router to ROS version 7 but I cannot verify.

Could you help me diagnose this issue?

2

Open a command line window, make it as wide as your screen allows, and run /tool sniffer quick ip-address=50.224.141.47,204.183.221.47 in it. Then try to open the web page and see what happens. Normally, you should see a small packet to one of the two addresses to arrive from the LAN and leave via WAN; another short packet from that address should arrive in response via WAN and be forwarded to LAN. Then another short one in LAN to WAN direction, and after that larger packets should strat passing through. You should see multiple sequences like that (first to port 80, later to port 443). As it doesn’t work, the reality will differ from this ideal scenario at some stage.