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Monitoring Firewall Events

Purpose

Use the Firewall Events page to view information about security events based on firewall policies. Analyzing firewall logs yields useful security management information, such as attempts to breach your network and observing the inherent characteristics of your traffic in real time. Using the time-frame slider, you can quickly focus on the area of activity that you are most interested in. Once the time range is selected, all of the data presented in your view is refreshed automatically. You can also use the Custom button to set a custom time range.

Starting in Junos OS Release 19.1R1, Firewall Events option is available for logical system and tenant users.

Action

To monitor firewall events select Monitor>Events>Firewall in the J-Web user interface.

There are two ways to view your data. You can select either the Summary View tab or the Detailed View tab.

Click Summary View for a brief summary of all the firewall events in your network.

The data presented in the line graph (also known as swim lanes) is refreshed automatically based on the selected time range. The line graph shows light blue lanes that represent all firewall events and dark blue lanes represent blocked firewall events.

Meaning

Time Range graph displays the trend of all events or flow for all the events that has transpired in the device.

You can specify the duration of time for which you want to view the trend for all events. The available options are 30m, 1h, 2h,…, and so on, which are displayed at the top right hand side of the page. For example, if you choose 30m, the end time is the current system time and the start time is the preceding 30 minutes from the current system time.

Click Custom to specify a customized time range. The Custom Time Range Selection popup window is presented. You can set the from and to date and time, and click OK to set the time range.

To refresh the graph on demand, click the refresh button.

You can also drag the slider in the Time Range graph from the extreme left or right of the graph and set the time range to see the trend or flow of events that has transpired in that time range.

There are two ways to view your data. You can select either the Summary View tab or the Detailed View tab.

The Summary View is selected by default, and it gives a brief summary of all the firewall events in your network.

The data presented in the line graph (also known as swim lanes) is refreshed automatically based on the selected time range. The line graph shows light blue lanes that represent all events and dark blue lanes represent blocked events.

Below the swim lanes are widgets displaying critical information such as top five sources, top five destinations, and top five users.

See Table 1 for descriptions of the widgets.

Table 1: Widgets in Summary View

Widget Name

Displays

Top Sources

Top five source IP addresses of the network traffic; sorted by event count.

Top Destinations

Top five destination IP addresses of the network traffic; sorted by event count.

Top Users

Top five users of the network traffic; sorted by event count.

Click the Detailed View for comprehensive details of events in a grid format that includes sortable columns. It displays information in grids that are lazy loaded with infinite scrolling. You can narrow down your search to a particular event based on IP address, description, or attack name. The table includes information such as the rule that caused the event, severity for the event, event ID, traffic information, and how and when the event was detected.

Table 2: Filter Options in Detailed View

The dropdown filter that is displayed above the grids.

Options available in the filter dropdown are: Event-Name, Source-Address, Destination-Address, Application, Rule-name, Threat-Severity, and Attack-Name.

Select the criteria or parameter on which you want to construct the filter statement.

Text box

Displays the filter parameter that you selected from the filter dropdown.

Note:

In the filter statement the following limitation exists.

  • You can use only one operator at a time.

  • You can use only one instance of the criteria or paramenter in one filter statement.

For example, if you have used & operator and the parameter event-name once, you cannot use them again in the same filter statement

CORRECT USAGE: event name = rt_flow_session_close & application=TELNET

WRONG USAGE:event name = rt_flow_session_close & event-name = rt_flow_session_create

WRONG USAGE:event name = rt_flow_session_close & source-address = x.x.x.x & application = TELNET

Note: The filter statement is NOT case-sensitive.

Add the parameter for which you want to filter. For example, in the dropdown filter if you selected event-name as the parameter, the text box displays event-name =. If you add rt_flow_session_close to see only Firewall events then the text box displays event name = rt_flow_session_close.

Go

Executes the filter statement that is displayed in the text box.

Click Go.

X

Clears the filters.

Click x.

Show Hide Column Filter icon represented by three vertical dots

Enables you to show or hide a column in the grid.

The Table 3 describes the grid information displayed in the Detailed View.

Table 3: Firewall Events - Grid Elements in Detailed View

Grid Element

Description

Event Name

The event name of the log.

Description

The description of the log.

Source IP

The source IP address from where the event occurred.

Source Port

The source port of the event.

Destination IP

The destination IP address of the event.

Destination Port

The destination port of the event.

Application

The application name from which the events or logs are generated.

User Name

The username from whom the log is generated.

Hostname

The host name in the log.

Service Name

The name of the application service. For example, FTP, HTTP, SSH, and so on.

Protocol ID

The protocol ID in the log.

Policy Name

Policy name in the log.

SourceZone

User traffic received from the zone.

Destination Zone

The destination zone of the log.

Nested Application

The nested application in the log.

Roles

Role names associated with the event.

NAT Source Port

The translated source port.

NAT Destination Port

The translated destination port.

NAT Source Rule Name

The NAT source rule name.

NAT Destination Rule Name

The NAT destination rule name.

NAT Source IP

The translated (or natted) source IP address. It can contain IPv4 or IPv6 addresses.

NAT Destination IP

The translated (also called natted) destination IP address.

Traffic Session ID

The traffic session ID of the log.

Rule Name

The rule name of the log.

Action

Action taken for the event: warning, allow, and block.

Time

The time when the log was received.

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