December 10, 2018

Category: Troubleshooting

How to configure a Rotating, long term packet capture using Wireshark.

Introduction Wireshark is an awesome tool for troubleshooting network traffic. Although the Wireshark GUI is not designed for long term packet captures and left running would simply fill the hard drive of the server/pc running the program. Within Wireshark there is a tiny built in Windows command line tool called ‘dumpcap’ which at less than […]

Firewall Troubleshooting :: CLI Packet Captures

In this post, I will cover the CLI based packet capture functionality for two firewalls; these are FortiGates and Check Points. Each have slightly different commands, but the results are fairly similar. This post will hopefully be of use for environments with multiple firewalls vendors, or where you support multiple customers with differing firewall vendors. What […]

FortiGate :: Web Filter Troubleshooting

When troubleshooting issues with the web filtering tool on the FortiGate, there are a number of things to consider. This post will hopefully assist you with getting to the cause of the issue if you encounter problems with Web Filtering. Firstly, we must consider the 3 modes of operation with web filtering on the FortiGate; these are: Proxy-Based (SSL […]

FortiGate :: HA Troubleshooting

FortiGates are capable of a few methods of High Availability.  This post will help you troubleshoot issues with the FortiGate Cluster Protocol (FGCP) in Active/Active or Active/Passive configurations. What is HA? High Availability is a feature that allows you to offer redundancy for your firewall. This is achieved by replicating all network connections on your […]

FortiGate :: Flow Diagnostics

In this post, I will provide an overview of the Flow troubleshooting tool available on FortiGate devices. This tool will enable you to see what is happening to your traffic as it traverses the FortiGate. You will be able to attain information such as policy-id being hit, NATing that is taking place as well as […]

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