Archive for September, 2008

What opportunities does Mobile IP offer WISPs?

Tuesday, September 23rd, 2008
In my recent article regarding the implementation of a MIP solution with Mikrotik RouterOS clients, I described some of the issues surrounding the a MIP solution as well as some of the solutions.  This article generated quite a bit of response and I wanted to take the time to now offer some business ideas for how this can be useful to WISPs. (more…)

Mobile IP? Some thoughts on how to make it happen with Mikrotik RouterOS.

Thursday, September 18th, 2008
It seems to be "all the rage".  Mobile IP.  In reality, mobile IP, describes the ability for a user to move across a network without having to renumber his devices.  This definition holds true even if a user moves from one network to another.  In other words, a user is able to keep his IP address without regard to where his device exists on the internet.  That's not exactly what I'm gonna describe here, but it is a very close approximation. The solution you are about to read is real and tested....names (and IPs) may be changed to protect the innocent... (more…)

Mikrotik RouterOS transparent bridge using PPtP and EoIP

Sunday, September 14th, 2008
In this article, I want to describe how to tunnel EoIP over a PPtP connection.  EoIP is a Mikrotik specific method of bridging ethernet traffic over a routed network.  The problem with using EoIP as a "VPN", is that it is not encrypted.  The network we will build in this article will tunnel the EoIP traffic over an encrypted PPtP tunnel.  There are other methods available in later versions of Mikrotik RouterOS to accomplish this functionality (OpenVPN, for one example) and I will be adding articles on some of these at a later time.  the method described in this article will work in any version of Mikrotik RouterOS.  It has been tested under 2.8.28, 2.9.51 and 3.13. (more…)

Mikrotik policy routing implementation example

Friday, September 12th, 2008
In "normal" routing, you have a set of routes that tell the router about how to reach certain networks.  Policy routing is a way to do the same thing, but have different "paths" or routes for various types of traffic.  In this article, we will explore the requirements for setting up policy routing and explain some of the concepts involved. (more…)

Mikrotik RouterOS Automated Backup

Thursday, September 11th, 2008
This article is just a script that you can cut and paste (with small changes) to your router. It will set up the necessary stuff to automate backups.  The script is commented well and the parts that you need to customize are highlighted, so that you know what has to be adjusted.  This is based on a script posted on Mikrotik's website, updated to work in 2.9.x and 3.x. (more…)

Mikrotik router audio alignment script.

Thursday, September 11th, 2008
This helpful script was given to me.  It was sent to me by WISP-Router (http://www.wisp-router.com/).  Casey told me it was sent to them by one of their customers.  It will create a beep that changes frequency as the alignment gets better/worse.  Requires (of course) a MT router with a speaker onboard. (more…)

So, how does routing work, anyway? (Part 1)

Thursday, September 11th, 2008
It's a question that I get from time to time and it's time to answer here.  If you understand the fundamental principles of networking, then all the other parts of building and maintaining an ISP network (wired OR wireless) are much simpler.  In this series of articles we will discuss the processes that make IP networking function by delving into the fundamentals of how subnetting works, how a router USES subnet information and the very important arp process. This topic is an easy topic to understand, but it is difficult to organize the materials and ideas needed to easily explain.  This is because there are so many pieces that are related and understanding one part is necessary to understand the next.  You, as a reader, may need to read this article more than once in order to fully understand all of the parts.  We will use the following "talking points" to cover this topic:
  1. Networking basics - what is needed to make two or more computers communicate?
  2. What is a router and why is it a necessary component in a  network?
  3. Subnet masks and what they mean.  What, exactly, IS a subnet address and why do I care?
  4. ARP - what is it and what does it do?
  5. Wrap up and tying up the loose ends.
(more…)