[wp-trac] [WordPress Trac] #30067: cookie error for multisite login

[WordPress Trac]

#30067: cookie error for multisite login
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 Reporter:  tezza71                 |       Owner:
     Type:  defect (bug)            |      Status:  new
 Priority:  normal                  |   Milestone:  Awaiting Review
Component:  Login and Registration  |     Version:  4.0
 Severity:  normal                  |  Resolution:
 Keywords:  reporter-feedback       |     Focuses:  multisite
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Comment (by SergeyBiryukov):

 Replying to [comment:2 tezza71]:
 > It does not say anything about "headers already sent". The entire error
 is;
 > "ERROR: Cookies are blocked or not supported by your browser. You must
 enable cookies to use WordPress."

 Some other possible reasons from #27373:
 * [http://wordpress.org/support/topic/cookies-are-blocked-or-not-
 supported-since-update-to-371/page/4?replies=105#post-4907345 "Some
 proxy/caching servers"] (e.g. Varnish) are configured to not allow setting
 cookies on GET requests. On a second attempt (after a POST request has
 been made), user is able to log in.
 * [http://wordpress.org/support/topic/error-cookies-are-blocked-or-not-
 supported-by-your-browser-1?replies=10#post-5172053 Invalid COOKIE_DOMAIN
 value] in `wp-config.php`. According to the original
 [http://curl.haxx.se/rfc/cookie_spec.html cookie specification], the
 domain value, if specified, must have at least two dots, so
 [http://stackoverflow.com/questions/1134290/cookies-on-localhost-with-
 explicit-domain 'localhost' is invalid].
 * [http://wordpress.org/support/topic/cookies-are-blocked-or-not-
 supported-by-your-browser-1?replies=18#post-5003387 CloudFlare caching
 rules] prevent the test cookie from being set.

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Ticket URL: <https://core.trac.wordpress.org/ticket/30067#comment:6>
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