[xwiki-users] sharing cookies between domains

Hi! Following a comment in http://jira.xwiki.org/jira/browse/XEM-174 and about xwiki.authentication.cookiedomains. As far as in understand it allows to share cookies between sub domains (for instance, wiki1.mydomain.com, wiki2.mydomain.com and wiki3.mydomain.com) but not between domains (for instance mydomain.com, yourdomain.com, theirdomain.net). As I am not sure about the terminology, I'm using between, across, sub domains and domains as per http://www.15seconds.com/issue/971108.htm Am I right or is it currently possible to share cookies between domains in a XWiki farm? For us, it is not possible to share a common part for domain names of virtual wikis. It can't be wiki1.mydomain.com, wiki2.mydomain.com but mydomain.com and yourdomain.com What I am trying to avoid is that an user must to log in more than once to access all the granted resources within a XWiki farm, mainly when moving from a virtual wiki to the main wiki for, for instance, edit his/her preferences or modify his/her profile. Thanks! Ricardo -- Ricardo Rodríguez CTO eBioTIC. Life Sciences, Data Modeling and Information Management Systems