ipfw rules do not work, see output here:
root@freenas:~ # iocage exec transmission service ipfw start
Flushed all rules.
00100 allow ip from any to any via lo0
00200 deny ip from any to 127.0.0.0/8
00300 deny ip from 127.0.0.0/8 to any
00400 deny ip from any to ::1
00500 deny ip from ::1 to any
00600 allow ipv6-icmp from :: to ff02::/16
00700 allow ipv6-icmp from fe80::/10 to fe80::/10
00800 allow ipv6-icmp from fe80::/10 to ff02::/16
00900 allow ipv6-icmp from any to any ip6 icmp6types 1
01000 allow ipv6-icmp from any to any ip6 icmp6types 2,135,136
03000 allow ip from 192.168.1.100 to 192.168.1.0/24 keep-state :default
03000 allow ip from 192.168.1.0/24 to 192.168.1.0 keep-state :default
04000 allow ip from 192.168.1.100 to 104.254.90.194 keep-state :default
05000 allow ip from any to any via tun*
65534 deny ip from any to any
Firewall rules loaded.