Eicon Networks 1530 Custom Security Features using IP Filters

Security 53

Custom Security Features using IP Filters

By using IP filters you can create your own custom security solutions. For example, you can

limit local access to the Eicon1530 for specific computers, accept incoming traffic only from

certain remote users or networks, or drop incoming or outgoing nuisance traffic.

•How Filtering Works............................................................................................53

•Defining a New Filter...........................................................................................54

•‘Edit Filters’ Page Options ..................................................................................56

•Example: Dropping incoming traffic from a specific network........................59

•Example: Allowing incoming traffic only from a specific network................. 60

How Filtering Works

Each profile you define for a particular connection has its own set of filters (called the ‘filter

stack’). All data packets, incoming and outgoing, pass through the filter stack of the profile

being used for a particular connection. A filter stack can have up to 8 filters, allowing for

sophisticated results.

Data cascades through the filter stack as shown in the following diagram. If a packet matches

one of the filters in the stack, the filter action is performed.

Note: All incoming and outgoing data passes through the filter stack.

Once any filter is activated, data transfer will be affected.

Filter #2

Filter #1

Data that matches

Drop

Forward

Apply filter

conditions

Apply filter

conditions

Action

Data that does

not match

Data that does

not match

Filter #8

Output from filter stack

Input to filter stack

Data that matches

Drop

Forward

Apply filter

conditions Action

Data that does

not match

Yes

Are any filters

active?

Bypass filter stack

Send all data into filter stack

Discard