NetSnap Support Document

I am behind a firewall and the announcer will not connect to the server

In order for the announcer service to work properly it needs to be able to contact the NetSnap registration server. If you are behind a firewall this may be a problem, depending on how your firewall is configured.

Ask your administrator to configure the firewall so that the NetSnap machine is allowed to establish outgoing connections, and is allowed to receive HTTP requests from the Internet. If your machine is not visible to the Internet you will not be able to use the HTTP service to send live images.

Every firewall is configured differently, so check with your Firewall vendor on how to perform the configuration.

A commonly used firewall is the Linksys EtherFast Cable/DSL Router. This advanced firewall uses NAT (Network Address Translation) with support for Forwarding incoming requests on specific ports.

To configure this firewall for use with NetSnap, use your web browser to log into the Firewall configuration menu and follow these steps:

1. At the SETUP menu, click on the Advanced tab
2. From the Advanced menu click on the Forwarding tab
3. In the Service Port range select port 81 to 81 in the first row, and assign it to the IP address on which the NetSnap machine resides.
4. Click on Apply
5. Open the NetSnap application and go to the Options | Server | Services configuration page. In the HTTP section set the port to 81.

Note: You may use a port other than 81, such as 82, 83, 84, 86, 87. Do not use port 85 as that is used by the lookup service.

Further, the NetSnap machine must use a fixed IP number from the Linksys router configured net, dont use DHCP on that machine, since you are specifiying which IP number the incoming requests are forwarded to.

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Last Updated: 06/27/04
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