When AND Why Proxy-ARP

Tuesday, June 1st, 2010
In my training classes, I go to great lengths to teach when and why proxy arp is necessary on an interface.  I have seen (and answered) numerous questions on my mailing lists regarding proxy arp and it seems it is time to create an article that I can just point people to.  I will focus this article on Mikrotik RouterOS (as many of my articles are), but it should be noted that proxy arp is not unique to Mikrotik. (more…)

How to bridge distant networks using RouterOS and PPtP

Saturday, December 5th, 2009
Mikrotik has recently added MPLS to their already amazing RouterOS product.  MPLS offers some really nice options for bridging networks that exist within a single administrative domain.  But, what can you do if you need to bridge 2 networks that do NOT exist within the same administrative domain?  This article discusses how to create a bridge using another fairly recent upgrade in RouterOS.  Read on... (more…)

Basic iptables tutorial

Sunday, July 6th, 2008
In this article, I will provide a brief tutorial for using iptables.  This article applies specifically to ImageStream routers, but more generally, it applies to ALL Linux based devices that use iptables for the filtering of traffic.  In another article, I will address firewalling in Mikrotik, which is, also, an iptables based firewall.  Some parts of this article will apply to Mikrotik, so it may be worth reading even if you are a pure Mikrotik shop.
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Welcome to my blog!

Sunday, June 22nd, 2008
This blog will contain several tutorials and thoughts about various networking devices and technologies. Part of the intent here is to share some how-tos using various products. Since I am most familiar with the ImageStream and Mikrotik products, you will find many of my tutorials revolve around these products. Also, I will be posting various general networking tutorials. If you can think of a specific tutorial you'd like to see written up, by all means, please let me know by email or by phone. My main consulting website is here.