何が原因で規制されているのでしょうか?

-- Your diagnosis --
 IP Address:221.133.86.212
 RemoteHost:sp1-c813-212.spacelan.ne.jp
-- %ENV[Environment variable] --
 HTTP_CACHE_CONTROL : max-age=0
 HTTP_CONNECTION : keep-alive
 HTTP_KEEP_ALIVE : 300
 HTTP_USER_AGENT : Mozilla/5.0 (Windows; U; Windows NT 5.1; ja-JP; rv:1.7.12) Gecko/20050919 Firefox/1.0.7
 REMOTE_ADDR : 221.133.86.212
 REMOTE_HOST : sp1-c813-212.spacelan.ne.jp
 REMOTE_PORT : 1217
-- DSBL --
 221.133.86.212 -> None(^-^)
-- BBQ --
 221.133.86.212 -> Roasted(-_-)
-- BBX(Unrelated to the proxies.) --
 221.133.86.212 -> None(^-^)
-- Tor(an anonymizing overlay network for TCP) --
 221.133.86.212 -> None(^-^)
-- PORT CHECKING --
 PORT 80: Result:refuse
 PORT 1080: Result:refuse
 PORT 3128: Result:refuse
 PORT 8000: Result:refuse
 PORT 8080: Result:refuse
 PORT 8888: Result:refuse