Comodo not allow the IP which allow.

When u set allow a host.in firewall. eg. hostname.no-ip.org
Once this host's ip is change.
Firewall possible will not allow the new IP. it will prompt to user. -_- !!
Suspect we not update the IP in time and firewall got the new IP without any rules. then after u update the host's IP. firewall very persistent , and stick to prompt to user.