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ZyXEL Firewall

In today's computing world, firewall is must for network security system build, as it prevents unauthorized access to or from a private network. It monitors and controls incoming and outgoing network traffic based on predetermined security rules.

The major use cases for this app are to investigate ...

Zyxel firewall info
Usage statistic
Security inspection

This firewall also generates the logs in various categories like traffic log, system monitoring, DHCP logs, security policy control logs and many more. So having the one location where you can see everything related this information will give a quick glance of network environment.

Idea is to use that logs and analyze to get insight of network activity and possible threats to it Using Splunk

The Zyxel firewall monitor app is based on logs that has being forwarded to splunk by receiving at port 514 which is default. Also the apps default setting for index, sourcetype is being saved in Eventtype, you can change this setting as per your configuration from the link provided in apps home dashboard.


1) ZyXEL Home
This is the home page of the app, shows all important details of the firewall like firmware version, model name,
device id, Current CPU and Memory levels in single value panel.
Also includes introduction page along with the links to Edit eventtypes used in app for modularity.

2) Usage Stats
This gives all the data usage statistics of firewall with chart showing data usage over the week.
You can also view the data usage by the users and devices connected to firewall. This detailes get automatically capured by the Alerts and Reports running in the app.
You may need to set the configurations for the alerts and reports as per your need.

3) Security
This gives all the security related information of the firewall like Outsiders attacks on the internal network and ports,
Log in attempts from users on firewall and locked ip address from firewall also showing the maps of the same incoming host as well.


Daily report to collect new devices
This report runs daily on 00:00 AM and collects the data into lookup if any new devices connected to the network.
The same lookup is used accross the App to get information like IP, MAC, Account and Device type.
The account will be the owner of the device and device type will be type of device of that owner.
(for eg- Account-"Admin" Device Type-"Laptop").


Firewall CPU/Memory threshold breach
Triggers when firewall CPU/Memory usage goes beyond 70, runs at every one hour.
you can change the trigger condition as per requirement in query.

Firewall download/upload data traffic limit breached
Sends alert when total downloaded data from organization goes beyond 15 GB.
and upload data from organization goes beyond 1.5 GB.
you can change the trigger condition as per requirement in query.

Mobile/Laptop download usage limit breached
Sends alert when total downloaded data from employee's mobile device goes beyond 500 MB
and Sends alert when total downloaded data from employee's laptop device goes beyond 1 GB.
you can change the trigger condition as per requirement in query.

New device connected to network
This alerts triggeres and send mail to administrator to fill the newly connected devices info into lookup as well as in Zyxel firewall DHCP setting,
as the ip address assigned to the devices should be fixed for the app to work.

To learn more about configuration on Splunk & Zyxel for data, please find the link here

Release Notes

Version 1.0.1
July 14, 2020

Fixed the props.conf for obtaining correct ports, the regex has been modified to work efficiently.

Version 1.0.0
March 5, 2020

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