Are the machines still configured to use your previous gateway? I ran into problems when I changed my router a few months ago and the router address changed from .254 to .1. It caused all sorts of random errors until I refreshed connections. My server which has a fixed IP address was the most affected. IPv6 was unaffected which confused me for quite a while.
Edited by Andrue (Sun 05-Apr-20 19:26:16)