Category: Networking
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Mikrotik Video Tutorial – Creating an IPSEC LAN to LAN Tunnel
So you have multiple sites that all have internet connections. You want to securely connect the internal subnets together…how would one accomplish this? You would use an IPSEC tunnel. Imagine it as a nice secure pipe that connects one site to the other. This tutorial will show you just how this configuration is accomplished. Use…
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Cisco 642-444 Call Manager 4.X -> Passed 😉
I snagged the callman test today. I wasn’t terribly worried, because I studied pretty thoroughly, but…I always get nervous. I find that if I chew gum during the test, it helps a LOT. I usually like to take the test first thing in the morning, that way I’m not thinking about it all day…hehe. I…
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Cheap High Density Layer 2 Aggregation
Lets say we have a company that has several locations. They are about to all move into a new building, the majority of these users will be in a cube farm. All of the users will be within 280′ of your IDF. Each user is getting two ports, and you want them both to be…
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BGP Route Servers – Insight Into Your Subnets
When you have multiple internet providers, how do you really know what’s going on with your subnets? There are looking glasses (web based interfaces), which give you insight into a providers BGP tables. You can also get BGP info via route servers. These are generally routers that you can telnet into and issue show ip…
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Homemade Fiber Tester
I needed the ability to conveniently test fiber, and I needed a light source for a light meter at the office. To buy one would have cost us around $600-1200, so I just made one for around $12 and some parts we already had. 🙂 Parts: I used a multimode to singlemode transceiver we had…
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Mikrotik METArouter
You may have seen metarouter in some of the Mikrotik change logs. First off, what is it? Metarouter is a way to have logical routers running on your routerboard. In essence, you create a virtual router on your RB, then you assign some interfaces to it. You then can hand this virtual router off to…
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Cisco NAT FTP to same IP as Overload
The idea for this tutorial is you only have a /30 on our outside interface. You have an FTP server on the inside of your network you want to make publicly accessible. What we are going to do is NAT the FTP port on the outside interface to our FTP server on the inside. We…