Our WebExchange software includes an IP Security feature that requires all commands sent to the exchange during your trading session be generated by the same computer. In its default setting, our software checks your computer's numeric address (called an "IP Address") everytime it receives a command from you.
This type of security is built into the WebExchange trading software because many of our traders are students who use computers in large labs. Requiring that all commands come from the same IP address prevents another person in the lab from reading information on the trader's screen and using it to access that trader's current trading session.
However, this security feature may interfere with trading for some of our users. The IP address assigned to your computer is determined by your Internet Service Provider (ISP). Some IPSs assign a permanent address to your computer. Some continually change your IP address while you are using your ISP connection. If your IP address changes while you are logged into the IEM, our trading software will detect this and prevent you from further trading.
If you are using an ISP that changes your IP address while you are connected, you will need to disable WebExchange IP Security.
To disable WebExchange IP Security, select "IP Security Disabled" on the IEM login page. This selection box appears immediately above the Login button. The default is "IP Security Enabled," so you will need to actively choose to disable IP Security.
You must choose whether to disable WebExchange IP Security every time you log in.