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Manipulating the OSPF Hello Packets on Cisco IOS

In this post, I will show you a LAB how you can manipulate the OSPF Hello packets in Cisco IOS and check how the OSPF neighborship will be lost between the 2 OSPF routers. Here are the points of the LAB with the LAB scenario: 1. All IP addresses are already configured as on the...

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Adding a password to Telnet on Cisco IOS

Telnet is a protocol that you can use to connect remotely to network devices (such as Cisco IOS Routers) so you can configure/monitor them. On Cisco IOS you can use Telnet, but it is advisable that you use SSH instead because it is more secure that it sent everything in an encrypted way, while...

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Adding a password to the console port on Cisco IOS

Most of you, as network engineers, when you want to configure the Cisco IOS router you use the console cable and connect it to the console port of the router. The console cable looks like this: This cable will be connected from your PC to the Cisco Router (or switch) on its console port....

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Ubiquiti EdgeRouter Firewall - Blocking local traffic to the EdgeRouter

In this lesson, I will show you how to configure Firewall rules on the Ubiquiti EdgeRouter X as direction local, which means for all traffic coming to the EdgeRouter itself. We have the following scenario: My computer is connected to the Ubiquiti EdgeRouter physically on Eth2, and the...

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How to configure Router on a Stick on Cisco IOS

In this lesson, I will show you how to configure router on a stick on Cisco IOS. Configuring router on a stick in needed when you are using a layer 2 switch and dividing your network into different VLAN's, and you want that the devices in those different VLAN's to be able to reach each...

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Blocking Youtube traffic on MikroTik without the use of Layer 7 Protocol

In this lesson, I will show how you can on MikroTik block YouTube traffic without you use Layer 7 protocol. Why without Layer 7 regular expression? Because Layer 7 is to heavy on your Router resources like CPU and memory as for each packet the Firewall on the router is inspecting the Layer 7 and...

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Limit Facebook traffic on MikroTik RouterOS without the use of Layer 7 regexp

In this lesson, I will show you how you can limit Facebook traffic on MikroTik Routeros without using Layer7 Protocol Regexp. Why without Layer 7? Because believe it or not, L7 Regexp is very heavy on the MikroTik CPU and using it can cause a lot of drop of packets when the traffic is passing...

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Limit streaming videos on Ubiquiti EdgeRouter using QOS Basic Queue & DPI

In this lesson, i will show you how to limit all streaming videos for your users who are getting their internet service from the Ubiquiti EdgeRouter. Let's imagine that you are an administrator of a network and you have seen that most of your bandwidth is being wasted in Streaming videos...

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Configure DHCP Server and DHCP Client on Cisco IOS

In this lesson, I will show you how to configure DHCP service on Cisco Router. In our production network, we need to use the DHCP server to distribute IP addresses, subnet mark, gateway, DNS to our internal devices. Let's see our network scenario that we are going to work on: We have R1 which...

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Blocking Social Media traffic on Ubiquiti EdgeRouter X using the Firewall

In this lesson, I will show you how you can blocking Social Media websites for your internal users who are getting internet service from the Ubiquiti EdgeRouter. Very important to remember, your should have the EdgeRouter updated to the latest version and the Deep Packet Inspection (DPI)...

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