Category Archives: Troubleshooting

FortiGate Troubleshooting Sessions

There are many options when troubleshooting in FortiGate firewalls.  I am a BIG sniffer guy.  Anyone that knows me or…

By Manny Fernandez

April 6, 2023

Troubleshooting SIP on FortiGate Firewalls

Since I replaced my lab FortiGate firewall from a 300E to a 601E, I ended up breaking my FortiVoice system. …

By Manny Fernandez

March 8, 2021

Troubleshooting FortClient VPN Connectivity Issues with FortiGate

As more and more users are using remote access VPNs and probably using FortiClient, I wanted to share the errors…

By Manny Fernandez

April 23, 2020

Troubleshooting Fortigate HA

Updated 20190602 Whe you have two Fortigates and you have configured them in HA, we sometimes see issues where they…

By Manny Fernandez

June 2, 2019

Killing a Fortigate Process

The other day, while troublehsooting a customer’s firewall, I noticed a process that was eating up the CPU. CPU was…

By Manny Fernandez

December 3, 2018

Loading FortiOS via CLI

Earlier today, I received a FortiAnalyzer 1000D from a customer. This was a PoC box that was never picked up…

By Manny Fernandez

December 1, 2018

Fortigate 6300 – Assigning Services to a particular blade

  The Fortigate 6300 Is a massive platform with so much power, it can be used in multiple deployment methods;…

By Manny Fernandez

November 15, 2018

macOS Mojave and Home Brew

Since I switched Apple as my main computer, I was running Mac Ports https://www.macports.org/ However with the release of macOS…

By Manny Fernandez

October 2, 2018

Making PopClip work in UltraEdit and SecureCRT

I use PopClip for Mac and it is such an awesome tool. What PopClip does: When you highlight some text,…

By Manny Fernandez

April 2, 2018

How DHCP v4 really works

If you ask people how DHCP works, most people will think that a computer gets connected to the network and…

By Manny Fernandez

March 12, 2018

ASA ‘HA’ configuration explained

When configuring the Cisco ASA for High Availability, the failover command is used to configure the devices. A few terms…

By Manny Fernandez

February 27, 2018

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