I am currently doing the Dynamic DNS setup and i think that is the way to go for any residential operation.
I am using Dyndns and with one hostname you can port forward to multiple relay nodes with different ports.
–pool-relay-port 6000
–single-host-pool-relay xxxxxx.dyndns.org
–pool-relay-port 6001
–single-host-pool-relay xxxxxxx.dyndns.org \
if you are running 1.26.1 , i have not able to resubmit my pool.cert . i am not sure if it is a known issue with 1.26.1 version and coincashew guide or it is my node only.