7-7
Capture and Display Filters
Creating Filters with Filter Templates
7
Creating and Applying a Port Number
Surveyor provides a convenient way to add a port number to a filter. You specify
port numbers for the filter by filling out the
Add Port to Template
area of the
Filter
Design
window. This area consists of a protocol selection, frame type selection, a
port number, a direction indicator, and an
Apply Port to Template
check box. Refer
to the table below for field definitions that comprise a port number selection.
Selecting Filter Templates
A filter template contains the data patterns for creating the logical conditions that
will be used as a test against incoming frames. To select a filter template, click on
the template in the
Available Filter Templates
area and press the
Add
button, or dou-
ble-click on the filter template. The filter template is added to the
Template Combi-
nation
box.
Filter templates are always assigned a name and that name is referenced in the tem-
plate combination. Pre-defined filter templates are provided that can be used as is,
or you can define your own filter templates. See “Standard Filter Templates” in
Appendix B for the filter templates supplied with Surveyor. You cannot alter the
pre-defined filter templates.
Most filter templates have a defined offset and pattern within a frame. However,
one template has no specific offset and length (
MatchAll)
. Some filter templates
have predefined values, such as
MAC_DA_Broadcast (FFFFFFFFFFFF)
.
Table 7-2. Defining Port Numbers
Conversation Element
Description
Protocol
IP/UDP, IP/TCP
Frame Type
EV2 (Ethernet II), SNAP, ISL, VLAN
Frame type applies to network layer addresses only. Use VLAN in
conjunction with Q+EV2 as the Conversation Frame Type to filter for
802.1Q packets.
Port Number
Decimal UDP or TCP port number.
Traffic Direction Indicator
<-> Capture/Display all traffic where the specified port
is the source or the destination
-> Capture/Display only the traffic where the
specified port is the source
<- Capture/Display only the traffic where the
specified port is the destination
Apply Port to Template
check box
Include or exclude the port specification as part of the filter template.
Summary of Contents for Surveyor
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