How To Edit A Filter; Understanding Filters And Filtering - Network Instruments Matrix User Manual

2. Ensure the Rules tab is selected.
3. Click a rule from the list.
The rule opens and is ready to edit.
4. In the Filter list, click which filter to bind to this rule.
5. Click Save.
The filter is successfully bound to the rule. When your rule is applied in a layout, the filter takes effect.

How to edit a filter

Edits can always be made to filters. Any filter edits you make affect every rule that filter is bound to.
To edit a filter:
1. Starting in the dashboard, click Rules.
The rules and filters designer appears, where rules and filters can be created and edited.
2. Ensure the Filters tab is selected.
3. Select a filter from the list.
The filter opens and is ready to edit.
4. Make your changes.
5. Click Save.
You successfully edited a filter. If the filter is bound to a rule that is connected in the active layout, your filter
edits take effect immediately.

Understanding filters and filtering

Filtering ensures that only specific traffic reaches your analysis tools. Filters can also extend the lifespan of
analysis tools, isolate specific traffic, and preserve data security and privacy.
Use filters to ensure that only specific traffic reaches your analysis tools. Each analysis tool in the organization
has a purpose. They function best when data is provided to suit that purpose. Conceptually, a tool configured to
only measure VoIP quality should receive VoIP streams and nothing else. Because any other data is unnecessary,
create a filter (page 23) to ensure only VoIP streams reach the tool.
Filtering can extend the lifespan of tools. The network is
equipment is expected to be upgraded or replaced. Filters can help your organization keep pace with the
network by isolating only what is needed, whether that contains certain address ranges, protocols, or other
criteria. Plus, filtering narrows the amount of data forwarded, so tools use less resources and generate less heat.
Filters work within rules. Alone, a filter is not functional. A filter performs its functions after the
a rule (page 23) and this
other filters.
Filtering can help isolate virtual traffic. Virtual networks within the network can be difficult to monitor. For
example, traffic from many
a specific VLAN ID contains data your tools need, use a filter to isolate this virtual traffic and forward it to those
tools.
Filtering can help prohibit sensitive data from being analyzed or leaked. If sensitive data is traversing the
network, you may want to, for example, prohibit the data from traveling to tools at the network edge. Consider
this scenario: Digital Imaging and Communications in Medicine
store, retrieve, and query, patient medical images and reports. Furthermore, the electronic security of patient
24 | Matrix™ (pub. 25.Apr.2014)
rule is used in a layout (page
virtual local area networks
expected to grow faster
22). The filter itself can be complex and even reference
(VLANs) might flow through the same network switch. If
(DICOM) is a set of network protocols used to
than your monitoring
filter is bound to