I have a router in London where I used for a short time my cellular phone via USB cable, and via dhcp-client the DNS addresses of my provider went into /ip dns dynamic-servers...
Several months and reboots from then they are still there, in spite of the fact that the ISP dns does not answer when conacted from outside its network... so, seen from a upstream router:
It keeps trying to contact them months after.
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[admin@MikroTik] > /ip firewall connection print interval=1 where dst-address~"80.58" Flags: E - expected, S - seen-reply, A - assured, C - confirmed, D - dying, F - fasttrack, s - srcnat, d - dstnat # PR.. SRC-ADDRESS DST-ADDRESS TCP-STATE TIMEOUT ORIG-RATE REPL-RATE ORIG-PACKETS REPL-PACKETS 0 C s udp 192.168.88.217:5678 184.108.40.206:53 9s 1024bps 0bps 13 721 0 1 C s udp 192.168.88.217:5678 220.127.116.11:53 8s 1024bps 0bps 13 721 0
Isn't there a way to remove those so called "dynamic-servers" which are proving to be more static than the static ones, from there?