Since lots of members have difficulties connecting with hamachi I decided to give it a try and to make a guide on how to use it with Comodo Firewall.
You must create 2 Allow Rules:
First Rule (is needed for acquiring an IP from the hamachi server)Action = Allow
Protocol = UDP
Direction = IN/OUT
Source IP = 5.0.0.1Destination IP = Any
Source Port = Any
Destination Port = A set of ports = 68,69Second rule (is needed by hamachi for connecting)Action = Allow
Protocol = TCP/UDPDirection = IN
Source IP = Any
Destination IP = Any
Source Port = Any
Destination Port = The port that you use in hamachi (for example 25153)
Now you can connect through hamachi without any problem.

Important:
Remember to move those rules up, over the default
Block IP IN/OUT Rule.