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Configuring OpenVPN on pfSense

In this article I will go through the configuration of OpenVPN on the pfSense platform. I have talked about the initial configuration of pfSense in this previous article and if you are not familiar with the platform then you can check that out to get you up and running. Let’s go ahead and start by talking about VPNs first and then we will move to the configuration. A VPN(virtual private network) allows us to connect directly to our...

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OSPF Configuration Overview Part 5

This is the fifth section of the OSPF series of articles. As before, we will be working with the following diagram: We will pick up from where we left off and that is OSPF area types. We covered both the stub and totally stubby area so far which leaves us with the following two area types: Not-So-Stubby Area Totally Not-So-Stubby Area In order for us to understand these two area types let’s suppose that area 45 which is in a...

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OSPF Configuration Overview Part 4

Welcome back to section 4 of the OSPF Configuration overview series of articles. We will continue working on the following network and pick up from where we left off. Note that I augmented the diagram by adding a couple of networks that R6 will be advertising to R1. The first thing that we will do is configure the link between R1 and R6 which will be running EIGRP. On R1 and R6 we will configure the IP addressing information on those two...

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OSPF Configuration Overview Part 3

This section will pick up from where we left off in the previous article. We are configuring the following network: Area 0 should be completely configured and the other two areas should also have been configured in a similar manner. Here are the configuration commands for R3 that will also apply to R5: R3(config)#interface loopback 0 R3(config-if)#ip address 10.32.0.1 255.255.255.0 R3(config-if)#no shutdown R3(config)#interface...

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OSPF Configuration Overview Part 2

This is a follow-up article to part 1 of the OSPF configuration overview. In here we will go over some of the verification commands that will help us with troubleshooting issues that may arise. At this point in time we have covered the majority of the basic OSPF configuration and I will now move to the informational commands. The first useful command is the “show ip protocols” which tells us what routing protocols are currently...

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OSPF Configuration Overview Part 1

In this article I will write about the OSPF routing protocol and give a quick overview of the inner workings. OSPF is a link state routing protocol as opposed to a distance vector protocol like RIP. You might be wondering what type of a protocol EIGRP falls under? EIGRP is categorized as an advanced distance vector protocol as it uses the DUAL algorithm rather than the Bellman Ford algorithm used by RIP. OSPF is based on Dijkstra’s...

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EIGRP Configuration Overview Part 2

This is a continuation to part 1 of the EIGRP Configuration overview. In this article I will go over some advanced EIGRP configuration options. One of the first things that we want to do after configuring EIGRP is to limit to which interfaces we create neighbor relationships on. On interfaces where only end-user stations will be plugged into we can set the interface mode to passive. Making the interface mode passive means that we...

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