Category Archives: Networking

Fluke Link Runner

Posted on October 28, 2011 by

When looking for a simple, easy to use and easy to carry network tool I decided on the Link Runner by Fluke Networks.  The device its self is about the size of a typically smart phone and about twice as thick.  There are only three buttons on the device; a power button and a pair of soft keys.  The top of the device has a pair of Ethernet ports that made to the typical RJ-45 connector. I found the device really easy to use.  It was as simple as plugging in to both ports and look at the screen to … Continue reading →

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Testing throughput with TTCP and Cisco Devices

Posted on October 14, 2011 by

Even if you have been around networking for a while you may have never ran into the TTCP utility. This utility also comes by the name of PCATTCP. It’s a really small command line, data sending, and throughput testing tool. It sends as much data as possible to another remote instance of TTCP. Cisco devices with newer IOS software (11.2 and newer, so a lot of old stuff too by that standard…) and advanced feature sets such as service provider and advanced IP services include this tool, according to the old Cisco documentation I’ve read. This tool was present on … Continue reading →

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Passive Sniffing on Windows

Posted on August 24, 2011 by

With Linux you can configure a sniffing only port relatively easy. Put it in promiscuous mode without an IP and sniff away passively. With windows, there is typically always an IP address assigned to an interface. If not statically assigned the interface will search for DHCP and will ultimately end up with an address in the 169 range if no address information is found. Either way there will be information from your machine showing up in a full, unfiltered packet capture. To get around this you will actually want to disable the TCP/IP stack for that interface. If this is … Continue reading →

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Mitel 5000 / Asterisk Integration

Posted on July 14, 2011 by

Mitel 5000 to Free PBX (Asterisk) Trunk The first dependency is to have licensing for the number of SIP trunks you would like to create on the Mitel 5000 system. We will be creating a SIP Trunk Group that will require these trunk licences. Each trunk needs a license at the cost of something like $125 a piece for small quantities. The Mitel 5000: First, go into System–>Devices and Features–>SIP Peers–>SIP Trunk Groups Create a SIP trunk Group with just a single extension number. It will probably be something like 9200X. Mine was 92003 but yours could end up being … Continue reading →

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