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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 necessary, 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
port number. Then select Source Port ID and enter the actual source port number to match on (see the
table on
page
16-12).
9.
Select Dest. Port Compare and choose a comparison method for the filter to use on a packet's destination
port number. Then select Dest. Port ID and enter the actual destination port number to match on (see the
table on
page
16-12).
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.
Viewing filters
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.
Modifying filters
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
Security 16-21
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