Eicon Networks DIVA LAN ISDN manual Default filters, To define a filter, What is a datagram?

Chapter Nine: Advanced Installations IP filters 129

Default filters

By default, the DIVA LAN ISDN Modem defines the following three filters for the ISP profile:

The first two filters prevent outside access to the web-based configuration interface and the CLI by discarding incoming HTTP and Telnet traffic. When you enable remote management, these filters are deleted.

The last filter is required because, by default, any traffic that is not forwarded is discarded when it reaches the bottom of the stack. This filter must be set to operate on all traffic (incoming and outgoing) because, once a filter is activated, all traffic passes through the filter stack.

What is a datagram?

Data on an IP network is carried in small packages called datagrams. Along with the data it is carrying, each datagram contains the IP address of its source and destination.

To define a filter

Filters become active immediately after they are defined. You do not have to reset the DIVA LAN ISDN Modem to activate them. If you are defining a filter that affects your connection to the DIVA LAN ISDN Modem, you will lose contact immediately after saving.

1.Start the web configuration interface and log in.

2.Click Manual Configuration.

3.Click IP.