3Com OfficeConnect Remote 812 manual Creating Filter Files, Using CLI, memory

	Creating Filters Using Command Line Interface 6-55
	3 ACCEPT generic=>origin=FRAME/offset=12/length=2/mask=0xFFFF/value=0x8136;
	4 ACCEPT generic=>origin=FRAME/offset=12/length=2/mask=0xFFFF/value=0x8137;
	999 DENY;
Step by Step Guide to	You can create filter files using any text editor. Once the file is created, use the
Creating Filter Files	Trivial File Transfer Protocol (TFTP) to place the filter file in the router FLASH
Using CLI	memory.

To create a filter file using CLI:

1Open a new text file. Enter the file descriptor on the first line: #filter

2Enter a file section header followed by a colon for the protocol rules you want to define. For example, if you want to define IP filtering rules, enter the following section header: IP:

3You can comment a section header out by placing a # sign before the section header. This is useful if you want to insert a placeholder for a protocol section you will define in the future.

4Enter the protocol rules for the protocol section you are defining. Observe the following guidelines.

Begin each rule with a unique line number ranging from 1 - 10.

Arrange rules in increasing line number order within each protocol section.

Arrange rules so that the rules you expect to be matched most frequently are

￿toward the top of the list

Delimit each rule with a semi-colon. Example:

IP 1 ACCEPT src-addr = 128.100.33.1; 2 ACCEPT dst-addr = 200.135.38.9; 999 DENY;

5Continue to define protocol rules for each protocol section you want to filter.

6Inspect the file to ensure that it meets all filtering rules.

7This step is important since you cannot edit the filter file from within the CLI. To edit the file, you must modify the it using a text editor, TFTP the modified file into the FLASH (replacing the original file) and verify the filter using the verify filter command.

8Save the filter file using a 12.3 FLT extension. The filter file extension will allow you to differentiate the filter file from other files stored in the router FLASH memory.

9You can use the list files command to ensure the filter file was successfully stored in the router FLASH memory.

10Configure a PC as a Trivial File Transfer Protocol (TFTP) client of the router by entering add TFTP client <hostname or IP address>.

To use CLI, see Chapter 1, Establishing Communications with the OfficeConnect Remote 812. This section provides detailed instructions for connecting the console cable and communicating with the OCR 812 using a terminal emulator like Microsoft’s HyperTerminal.

11From a machine that has access to the same network as the router, use a TFTP command to transfer the filter file to the router FLASH memory.