February 22, 2019

Asymmetric NAT rules matched for forward and reverse flows

I was configuring a basic VPN configuration on my home Cisco ASA firewall so I could monitor a few things locally on my network while I was out with my iPhone. Being a Friday...

HSRP Version 1 vs Version 2

HSRP, or hot standby routing protocol, is very commonly used in the networking world. It is a great solution for providing redundant gateways for a wide array of networks. Over time there have been...

3 ways to NAT on a Cisco Router

When working with Cisco routers, whether in a lab or production environment, there are may ways that NAT will come into play. This article will discuss the three most common reasons you would need...

OSPF DR Election Process

OSPF is a routing protocol that is popular because of the compatibility between vendors, compared to EIGRP being a Cisco proprietary routing protocol. One major component of OSPF is the usa of...

EIGRP and AF-Interface

Within the realm of EIGRP, there are two different modes, classic and named. Classic is the usual version most people are used to where the protocol configuration starts with "router eigrp 123" or something...

BGP Aggregation and Suppress Maps

Within BGP, there are sometimes situations where it is better to send a summary address advertisement instead of advertisements for multiple subnets. This is the same with BGP as it is with other routing...

Cisco ASA 9.4 – Policy Based Routing

It has finally happened: policy based routing is available for the Cisco ASA platform. This comes about from the new version 9.4 of the ASA software. While a lot of the time policy based...
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