I have just installed open-wrt on a d-link covr-1860 wifi access point using the factory image, got an successful installation message, but I cannot log into it.
I can see that my router has assigned an IP to the open-wrt device, and I can ping it, but SSH port 22 and HTTP port 80 are both closed.
OpenWrt, by default, has ssh enabled and the port is open from the lan side. The same is true for the LuCI web interface as long as you're using a stable release build (snapshots don't have LuCI preinstalled).
Make sure you are connected via ethernet to the lan port. You should get an address in the 192.168.1.0/24 network and you can reach the router via ssh or web at 192.168.1.1 (username "root", no password).
Version installed was factory image of version [23.05.5]
The open-wrt device is on a lan which already has a DHCP server. This server has assigned 192.168.12.36 to the the Open-WRT. Port 22 is definately closed on it.
I have then disconnect from the main switch to isolate from the DHCP server. When I do this my computer just waits for a IP assignement which does not happen. I manually enter an IP of 192.168.1.2/24 and try to ping 192.168.1.1: "cannot reach host"