User blog comment:Nanamin/Bypassing the DMM Error Area/@comment-26154973-20150805015259

Don't know how it was before, but DMM sends this back:

Set-Cookie: ckcy=deleted; expires=Tue, 05-Aug-2014 01:37:39 GMT; path=/; domain=.dmm.com Set-Cookie: ckcy=2; expires=Thu, 04-Aug-2016 01:37:40 GMT; path=/; domain=.dmm.com

The cookie method still works for me though (in Chrome and KCV), because the client sends

Cookie: ckcy=1; ...; ckcy=2; ...

and DMM seems to be fine with it (that second ckcy=2 is for path=/; domain=.dmm.com, while ckcy=1 is for domain=www.dmm.com; path=/netgame/ which is more specific, http://stackoverflow.com/q/4056306).