A couple of times in the last month I noted different PCs, on two different VLANS had lost capability to connect to the internet.
I have two WANs a primary and a secondary. The secondary is for email only and has its own routing.
In the case above connection was lost to both internet traffic and email traffic.
On each PC I rebooted and that didnt solve the problem.
In each case I solved the issue by removing the automatic DHCP DNS setting on the PC itself by setting the DNS statically to 9,9,9,9 or 1,1,1,1 etc.
Right away I got good traffic.
Why is this perchance happening??
No changes to DNS settings…
add action=accept chain=input comment=“Allow LAN DNS queries-UDP”
connection-state=new dst-port=53 in-interface-list=LAN protocol=udp
add action=accept chain=input comment=“Allow LAN DNS queries - TCP”
connection-state=new dst-port=53 in-interface-list=LAN protocol=tcp
/ip dns
set allow-remote-requests=yes servers=9.9.9.9,1.1.1.1,8.8.8.8
/ip dhcp-server network
add … dns-server=…0.1 gateway=…0.1
add … dns-server=…2.1 gateway=…2.1
etc for all my vlans.
