I have various sections in my site like www.mysite.com, email.mysite.com, news.mysite.com, etc all running on the same server but with different vitual IPs. that is each is configured for the port 80 and different virtual IPs. For all these sections, I need to use the same session variable to keep track of the user. How can I do it without using Cookies. For example if the user signs in from email.mysite.com and goes to chat.mysite.com, the session should be maintained. Please help me. Thanks in advance.