Anyone knows how to connect the web interface of the ants to a domain ie: ant.mydomain.com
Uh yeah same way you would with any other device. You need access to the domain server records and just create an A record with the IP of the device.
Ok so if they are all on the same network router, would i have to set a different port for each?
Whatever you are planning, don't even think about opening ports up through your router to the miners on your network. Not only will your miners be compromised, your entire internal network will as well.
Minimum you want to do is use a VPN into your network and manage your miners that way.
not totally true .. you could only allow those ips of your mining pool through the firewall on the open port that the mining pool uses, and you could put your ants in one vlan and limit the mining pool data to that one vlan through your firewall . if you have an ips then can monitor the traffic to the ants and have control of network traffic that way too. this probably not practical for home networks though.
to answer questions add new host (i prefer static ips) to dns server for each ant .. if these are behind a firewall then the firewall will need to have whatever port your ant is mining on to the mining pool opened as explained above. use vpn into the network to access the ants from outside the network .