freebsd inclusive firewall

[Lem0nHead]

hello

i want to do a inclusive firewall for my server
do you think below will work?

deny all from all except:
allow tcp ports 20, 21,22,25,53,80,110,143,443,465,993,995,3306 IN and OUT
allow udp port 20,21,53 IN and OUT
allow icmp types 3,5,11,0,30

 

[hklcf]

I also want to do this.
Have any one can help us?