![]() In fact, IM text is packaged as hypertext and uses the Hypertext Transfer Protocol (HTTP). Since the IM messages are text-based and use the TCP connection, they can sail right through your firewall just like the information that makes up the pages that your browser renders. Since the communications are server-mediated sessions, messages between the two parties are actually sent to the server, which then forwards them to the recipient-there’s no direct connection between the two parties.It can ride along on the TCP connection without any special considerations. The information transferred in IM sessions is text-based.IM and Presence don’t have any real problems working through a firewall or NAT because both IM and Presence can use the TCP connection and are actually server-mediated sessions. Presence is a component of IM that allows you to see when your friends are online. Of course, IM provides users the ability to send and receive typewritten messages in real time. Probably the biggest uses for Windows Messenger are instant messaging (IM) and Presence. Let’s take a look at each one of Windows Messenger’s components and focus on the types of problems that can arise when you try to employ these components behind a firewall and NAT. I’ll then explain how all these pieces must function together in order for all of Windows Messenger’s components to work. ![]() I’ll start at the bottom and work up as I examine each piece in the puzzle. I’ll explore the ins and outs of how Windows Messenger works with a firewall and NAT component. You’ll need to be prepared to perform some additional configuration to get all of Windows Messenger’s components to work properly, and to do so, you really need to have an understanding of the underlying technology. The chances of you falling into the former are pretty slim. In other cases, certain components will be limited or not work at all. In some cases, all of Windows Messenger’s components will work just fine with your firewall and NAT. If you’re thinking about employing Windows Messenger as a communication tool on your network, you need to be aware of how it will interact with your network’s first line of defense-the firewall-as well as Network Address Translation (NAT) components. These types of real-time electronic communication stand ready to revolutionize the way that your company does business. Additional features, such as making calls to a regular phone and sending instant messages to pagers are also possible with Windows Messenger. Windows Messenger opens the doors to all kinds of real-time electronic communication: instant messaging, video conferencing, voice conversation, remote assistance, and application sharing and file transfer. Greg Shultz explains why firewalls and NAT cause connection problems and shows you ways UPnP can help. But it's a challenge when firewalls and NAT are involved. Windows Messenger can connect your users in exciting new ways. Get Windows Messenger to work with firewalls and NAT ![]()
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