How to abandon previous session of the same user?

[anoop s]

Hi,

I 'm working on a web application. suppose user 'A' login from machine 'X'. If the same user tries to login from another machine, he should automatically signout from mechine'X'. In short i want to avoid multiple login. Pls Help me!!!. Thanks in advance

Anoop S.

[Frinavale]

Before we can help you, please let us know about what form of authentication you're using :)

It shouldn't be too hard to check the database for a field that indicates something about the computer the currently logged in user is using... Just compare it to something set in a cookie to determine whether or not the log-in is still valid.

-Frinny

[anoop s]

Thanks for immediate response, I am using form authentication.

[kadghar]

If you want to keep an IP log, just make a table with USER and IP columns that keeps track of the current IP of the user. For easier, generate a session variable with a GUID and write it in your database.