FortiGate - Guía de resolución de problemas

by Efren Teruel Dominguez

He tenido la suerte y el privilegio de poder trabajar, primero como asesor técnico, y luego como traductor al español, de la obra de un colega y amigo mío:

https://lnkd.in/gbkqjTT

FortiGate - Guía de resolución de problemas

Fortigate, a Troubleshooting Guide es un excelente trabajo de Hubert Wisniewski, aprovechando sus muchos años de experiencia en el sector de la seguridad y la formación.

Conté con su confianza para este proyecto, que llevó bastantes horas y muy contento de que esté ya disponible a la venta a través de la plataforma de Amazon.

Se aceptan críticas constructivas! :D

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I have had the privilege and luck of being able to work, first as technical reviewer, and then as translator, for my friend and colleague Hubert's guide:

https://lnkd.in/gbkqjTT

FortiGate - Guía de resolución de problema

Fortigate, a Troubleshooting Guide is an excellent work by Hubert Wisniewski, using his many years of experience in Security Field. I got his trust to translate his book to Spanish, learning a lot during the process.

Happy to have the product already available in Amazon, hope you all enjoy it!

Efren Teruel Dominguez

Comments

What should you know about HA 'override enabled' setting on Fortigate?

High availability is mandatory in most of today's network designs. Only very small companies or branches can run their business without redundancy. When you have Fortigate firewall in your network you have many options to increase network availability. You can use Fortigate Clustering Protocol ( FGCP ) or Virtual Router Redundancy Protocol ( VRRP ). FGCP has two modes: 'override' disabled (default) and 'override' enabled . I'm not going to explain how to set up HA as you can find many resources on Fortinet websites: https://cookbook.fortinet.com/high-availability-two-fortigates-56/ https://cookbook.fortinet.com/high-availability-with-fgcp-56/ Let's recap what is the main difference between them. The default HA setting is 'override' disabled and this is an order of selection an active unit: 1) number of monitored interfaces - when both units have the same number of working (up) interfaces check next parameter 2) HA uptime - an ...

FortiGate and GRE tunnel

Recently I worked on one project where a client requested to re-route web traffic to the GRE tunnel to perform traffic inspection. I would like to share with you what is required if you configure it on FortiGate. We need a new GRE interface and policy base routing (PBR) to change the route for specific source IPs. Of course you need firewall policies to permit the traffic. Let's start with GRE interface. Unfortunately you can't configure it using the GUI, only CLI is the option: config system gre-tunnel edit "gre1" set interface "port1" set local-gw 55.55.55.55 set remote-gw 44.44.44.44 next end When the end peer is Cisco router, you need to set the IP for the GRE interface: config system interface edit gre1 set ip 192.168.10.10 255.255.255.255 set remote-ip192.168.10.20 end In next step we need to fix routing. We need the alternate path via GRE but to keep the route in the active routing table you need to set the same AD (adminis...

Inpection of asymmetric sessions on FortiGate

There is one feature available on FortiGate, and I think you should know it, as it modifies a bit what we know about stateful firewalls. In past every packet was treated individually and you had to create policies in both directions. With stateful firewalls we can track connections, and by checking couple of attributes, we can treat them as part of the same session. For example when you initiate connection from a host1 to host2, the returning connection from host2 to host1 will be treated as part of the same connection (session). They have to have the same source/destination and destination/source IPs, port numbers and interfaces.There is an exception from this rule and FortiGate in some specific cases can accept connections on port which was not used in the initial connection. Let me explain how it works on the below example: The host1 has a default gateway on R1 (10.0.1.2), but you may notice that it is not the optimal path to host2 subnet. When we analyze ...

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