Set custom DNS Server Port in ROS v5?

Here’s my setting:
Router OS = V5.26
ether1 = WAN
ether2 = LAN (masqueraded)
DNS Server = Static to 208.67.222.222
Web Proxy = Enabled (dst-nat port 80 redirect to port 8080)
The problem is: my isp block port 53, so I cant get any access.
Is there any way to set custom DNS Server Port? Port forwarding thru dst-nat did not working when Web Proxy enabled.
Port forwarding thru dst-nat only working with web proxy disabled, but internal DNS Server bypassed (no entry in dns cache window).

Even if there was a way to set the DNS server, you can’t possibly configure every DNS client.

But… the clients in your LAN should have no problems accessing your router’s DNS server, as long as your router’s firewall doesn’t forbid them (and you’ve checked “Allow remote requests”).

The fact that your ISP blocks port 53 should only prevent DNS requests from the WAN.

I want all devices at LAN connecting to internal ROS DNS Server at port 53, then ROS DNS Server communicate to WAN using another specified port. Can ROS do that?

This system is so damn easy to do with centos. Just modify dnsmasq config file. But there’s no settings in ROS.