Transmission

%transmission-daemon -f
[19:40:30.719] Couldn't create socket: Protocol not supported
[19:40:30.720] RPC Server: Adding address to whitelist: 127.0.0.1
[19:40:30.720] RPC Server: Adding address to whitelist: 192.168.100.2
[19:40:30.720] RPC Server: Serving RPC and Web requests on port 9091
[19:40:30.721] RPC Server: Whitelist enabled
[19:40:30.721] RPC Server: Password required
[19:40:30.721] Transmission 1.51 (7970) started
[19:40:30.820] transmission-daemon: requiring authentication
[19:40:31.720] Port Forwarding (NAT-PMP): Port Forwarding (NAT-PMP)
[19:40:31.720] Port Forwarding (NAT-PMP): Port Forwarding (NAT-PMP)
[19:40:39.723] Port Forwarding: Port Forwarding
[19:40:39.724] Couldn't create socket: Protocol not supported
[19:40:39.724] Port Forwarding: Port Forwarding
[19:40:39.724] Port Forwarding: Port Forwarding
[19:41:02.719] Searching for web interface file "/home/admin/.local/share/transmission/web/javascript/transmission.js"
[19:41:02.719] Searching for web interface file "/usr/local/share/transmission/web/javascript/transmission.js"

%uname -sr
FreeBSD 7.1-RELEASE-p4

installed packeges:
transmission-cli-1.51_1 A fast and lightweight CLI (command line) BitTorrent client
transmission-daemon-1.51_1 A fast and lightweight daemon BitTorrent client
transmission-web-1.51 A fast and lightweight WebUI for Transmission BitTorrent cl

write(2,"[22:15:44.943] Port Forwarding: "...,48) = 48 (0x30)
socket(PF_INET6,SOCK_STREAM,0) ERR#43 'Protocol not supported'
gettimeofday({1240064144.943699 },0x0) = 0 (0x0)
gettimeofday({1240064144.943776 },0x0) = 0 (0x0)