Справочное Руководство для Netopia r6100

ICMP Code Compare – Select 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.

In addition to the Type, an 8-bit field, Code, gives more information about the Type. ICMP Codes include:

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.

8.

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 

9.

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 

10. 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 and return to the Add IP Filter Set screen.

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

To modify a filter, select Display/Change Input Filter or Display/Change Output Filter in the Add IP Filter Set 
screen to display a table of filters.

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