Multiple AllStarLink nodes on the same IP subnet (i.e. your “local network”) when those nodes are behind a NAT device can be a challenge. The reason is that AllStarLink works exclusively with public IP addresses. When two nodes are on the same network behind a NAT/router they independently need to use a public IP address with the AllStarLink system but need to know about each other’s local IPs rather than their shared public IP. Additionally both nodes cannot use the same UDP port as they will fight over it with the NAT/router.
There is a new page in the Manual to explain how to configure multiple server/nodes on the same local network.