Hostname resolution TTL

Hello,
I’m just testing Comodo. It seems great but I’ve a problem.

I would like to create a rule to connect to a hostname like xyz.dyndns.com. The IP address change because it’s a laptop which connects everywhere. It seems that Comodo doesn’t update the IP address regularly according to the DNS TTL.

What can I do?
Thanks

Moreover,

It seems that rules with hostname doesn’t work in Global Rules…

Version 5.5.55810

Any idea ?