Category Archives: All

DNS Doctoring on FortiGate

Sometimes, you have a scenario where your internal servers or devices are using external DNS servers (e.g. 8.8.8.8 or 4.2.2.2…

By Manny Fernandez

August 2, 2021

IPv4 and IPv6 DHCP Options

DHCP Options When configuring DHCP in various system, you sometimes requires specific options such as when you configure Cisco Phones…

By Manny Fernandez

July 26, 2021

Quick-Tip – Geography-Based Internet Services Databases

Sometimes you want to use the awesome feature of Internet Services Database from Fortinet.  The Internet Services Database is an…

By Manny Fernandez

March 16, 2021

DNSTracer and Dig for Troubleshooting DNS problems

When troubleshooting DNS issues,   DNSTracer is a utility to visualize the patch taken by your DNS query.  As most of…

By Manny Fernandez

March 13, 2021

Collecting DNS Logs for Post-Mortem

Here is an article that has been a long time coming.  One of the things I do when a customer…

By Manny Fernandez

March 12, 2021

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

Quick-Tip – FortiGate Alias command

Quick-Tips are short how to's to help you out in day-to-day activities.  Usually they are quick easy commands to make…

By Manny Fernandez

February 24, 2021

Quick-Tip : How To Run Sniffer on FortiGate CLI

Quick-Tips are short how to's to help you out in day-to-day activities.  Usually they are quick easy commands to make…

By Manny Fernandez

February 24, 2021

Quick-Tip : Debugging IPsec VPN on FortiGate Firewalls

Quick-Tips are short how to's to help you out in day-to-day activities.  Usually they are quick easy commands to make…

By Manny Fernandez

February 23, 2021

Querying Nested LDAP Groups on the FortiGate

Use case: When dealing with LDAP queries, sometime you have issues with using nested groups.  That is, you have a…

By Manny Fernandez

February 23, 2021

FortiGate AD Polling with Windows Server 2003

Today, I was helping a customer set up Active Directory polling from a FortiGate firewall using the External Connector which…

By Manny Fernandez

February 22, 2021

Using WAN Link Monitor for Redundant Internet Connections

First thing I want to mention is that there is other ways of doing multiple ISPs using SD WAN configuration…

By Manny Fernandez

February 10, 2021

Setting Up Notification of FortiGate Firewalls with Automation

Staring in 6.2 there was the ability to set up automation stitches on the FortiGate firewalls.  In 6.4, Fortinet enhanced…

By Manny Fernandez

February 6, 2021

Port Mirroring on FortiLink’d FortiSwitch

Customer Use Case:  Customer has some UCAAS voice solution.  They want to be able to record phone calls for wire…

By Manny Fernandez

February 3, 2021

Nest – No Power to RH or RC wire detected

Quick little article on my findings.  So, last week, my Nest Thermostat starting acting up.  It would shut down and…

By Manny Fernandez

October 4, 2020

Setting up SSL Offload and Load Balancing for inbound connections on a FortiGate

Today I was working with a colleague of mine on a proof-of-concept for one of his customers.  The requirements were…

By Manny Fernandez

August 24, 2020

Protected: Using Referrer Field with FortiGate Web Filter

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By Manny Fernandez

August 7, 2020

Setting up Alerts in Observium Community Edition

In this article, I am going to show you how I set up Observium to send me an email alert…

By Manny Fernandez

July 23, 2020

Parcel App for macOS and IOS

Started using an app for tracking deliveries to my house.  During this Covid-19 time I have spent way too much…

By Manny Fernandez

July 1, 2020

Decreasing Fail-Over Time for Multi-Homed VPNs using DPD.

Use case: Customer has two ISP connections at both sites. Two VPNs configured. ISP1 to ISP1 and ISP2 to ISP2.…

By Manny Fernandez

July 1, 2020

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