Справочник Пользователя для Netopia R310

10. Select ICMP Code Compare and choose one of the following options from the pop-up menu: No Compare, 

Not Equal To, Less Than, Less Than or Equal, Equal, Greater Than or Equal, or Greater Than.

11. In addition to the Type, an 8-bit field, Code, gives more information about the Type. Select ICMP Codes and 

select more information about the type.  The choices are:

It is unlikely that you would need to filter on ICMP code types. However, if you should find it necessar y, refer 
to standard texts on internetworking with TCP/IP for more information.

12. If the Protocol Type is TCP or UDP, select Source Port Compare and choose a comparison method for the 

filter to use on a packet’s source por t number. Then select Source Port ID and enter the actual source 
por t number to match on (see the table on 

).

Note: If the Protocol Type is ICMP, you will not see this field.

13. Select Dest. Port Compare and choose a comparison method for the filter to use on a packet’s destination 

por t number. Then select Dest. Port ID and enter the actual destination por t number to match on (see the 
table on 

Note: If the Protocol Type is ICMP, you will not see this field.

14. When you are finished configuring the filter, select ADD THIS FILTER NOW to save the filter in the filter set. 

Select CANCEL to discard the filter.

To display a view-only table of input (output) filters, select Display/Change Input Filters (Display/Change 
Output Filters) in the Add IP Filter Set screen. 

Type

Description

0

Echo reply

3

Destination unreachable

8

Echo request

Code

Description

0

Network Unreachable

1

Host unreachable

6

Destination network unknown

7

Destination host unknown