The SJWs at OpenDNS has blocked 8kun.tw as a 'security threat.' This could be the result of another Fredrick Brennan act of hate towards this forum.
Anyway, if it is a problem for folk, it can be bypassed by using a different DNS service or adding 8kun IP addresses to your hosts file.
62.113.113.103 8kun.net 8kun.us 8kun.tw
62.113.113.103 media.8kun.net media.8kun.us media.8kun.tw
62.113.113.103 sys.8kun.net sys.8kun.us sys.8kun.tw
62.113.113.103 nerv.8kun.net nerv.8kun.us nerv.8kun.tw
62.113.113.103 softserv.8kun.net softserv.8kun.us softserv.8kun.tw