I have a very strange issue - for some reason I am no longer able access any Mikrotik websites, such as mikrotik.com, forum.mikrotik.com and help.mikrotik.com. I am also unable to fetch any updates directly from Mikrotik routers too. All other websites are loading fine, except Mikrotik’s websites. Obviously using other ISPs works just fine. Ping and traceroute to Mikrotik servers also work fine. Trying to access any Mikrotik website will result in timeout. I tried using 1.1.1.1 as well as 8.8.8.8 as DNS servers but IPs that are being resolved are the same, so no issues with DNS here.
I have no firewalls, fresh install on my Mikrotik router (which is also not able fetch updates), no firewalls designed to block any dst traffic and I am coming to the following assumptions:
a) Mikrotik, for some unknown reason, blocked my IP
b) My ISP blocking such traffic to Mikrotik servers
I managed to workaround this by routing all the traffic of Mikrotiks IPs through NordVPN server, but I am trying to understand what the hell is going on. I am from Lithuania, not China… Any suggestions or ideas?
Does it only happen when router is trying to connect mikrotik servers or it happens from a PC behind the router as well? If you have a linux PC handy, you can try to see where connection breaks by running tcptraceroute (probably something similar exists for other OSes). For me some hops in Latvia fail but I can connect server anyway:
user@host:~$ tcptraceroute www.mikrotik.com 80
Selected device eno1.42, address 192.168.42.10, port 45873 for outgoing packets
Tracing the path to www.mikrotik.com (159.148.147.196) on TCP port 80 (http), 30 hops max
1 192.168.42.1 0.384 ms 0.240 ms 0.238 ms
2 some.isp.net (x.y.z.w) 5.370 ms 5.281 ms 5.177 ms
3 a.b.c.d 5.432 ms 20.991 ms 31.993 ms
4 b.c.d.e 17.127 ms 16.959 ms 17.129 ms
5 pd900c61a.dip0.t-ipconnect.de (217.0.198.26) 17.734 ms 17.824 ms 17.410 ms
6 ffm-b4-link.telia.net (213.248.93.186) 22.997 ms 119.075 ms 23.162 ms
7 ffm-bb1-link.ip.twelve99.net (62.115.114.88) 58.250 ms 136.670 ms 57.939 ms
8 s-bb3-link.ip.twelve99.net (62.115.138.236) 59.304 ms 58.951 ms 59.745 ms
9 riga-b1-link.ip.twelve99.net (62.115.136.77) 57.209 ms 57.472 ms 57.172 ms
10 telialatvija-ic-332270-riga-b1.c.telia.net (213.248.84.33) 57.494 ms 57.696 ms 57.500 ms
11 * * *
12 * * *
13 * * *
14 mikrotik.com (159.148.147.196) [open] 60.431 ms 58.399 ms 57.999 ms