Multiple sessions for one user?

Hi I have host web application which is developed using java and jsp. In client side each client give five ajax calls to the server to retrieve data from the server in every 30 seconds. My problem is can one user who use one browser to log in to the system have multiple session at a time. Reason is 开发者_运维知识库when i use the tool to use monitor the firewall I can see more than 10 sessions are active for one IP. How this can happen? any comments

• Another browser application can be used.
• Some browsers doesn't take session from already running browser instance
• 2 or more user behind the same proxy, will end-up having the same IP (provider's IP)

1.The IP you see is Public IP which could be same for multiple users hence you see multiple calls from same IP.

1. A single user using different browsers will have same IP but will show up as 10 calls in your log.