# Need Single sign on solution?

**URL:** <https://www.ruby-forum.com/t/need-single-sign-on-solution/197243>\
**Category:** Rails\
**Created:** [March 5, 2008, 12:43pm UTC](https://www.ruby-forum.com/t/need-single-sign-on-solution/197243 "2008-03-05T12:43:14Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![varunkumargoel](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/v/ed8c4c/32.png) [@varunkumargoel](https://www.ruby-forum.com/u/varunkumargoel)\
**Post date:** [March 5, 2008, 12:43pm UTC](https://www.ruby-forum.com/t/need-single-sign-on-solution/197243/1 "2008-03-05T12:43:14Z")

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Hi All,  
I am doing my site user authentication through LDAP server and my  
company has 3 more sites with different technologies and they are also  
doing user authentication through LDAP server.  
Now we want that when user logged in my application [1.domain.com](http://1.domain.com) then  
user also logged in other application [2.domain.com](http://2.domain.com) and [3.domain.com](http://3.domain.com).  
Please help me out.  
I will be so thankful to all of you?

If u r saying bout session or cookies please give some code example or  
detailed description.

Thanks & Regards,  
Varun G.