RANCID is a simple but useful utility for backing up configuration files from network devices. I’ve worked with RANCID for many years and for the most part it tends to work well but occasionally I encounter problems when adding devices from new vendors. I recently ran into an issue while attempting to add some Palo […]
Networking
Analyzing Bitcoin Network Traffic Using Wireshark
Since Bitcoin is a peer to peer protocol it relies very heavily on network communication to perform its functions. The best way to get a closer look at the Bitcoin protocol is to use a packet sniffer such as Wireshark to view the frames traversing the network. There are several different Bitcoin clients available but […]
Visiting the Google Fiber Space in Kansas City
Yesterday was opening day for Google’s new Fiber Space located in Kansas City (1814 Westport Road). I’ve been really excited about this project since it was announced so I decided to go down and check it out. The Fiber Space is basically a big demo area for Google Fiber where you can test out their […]
Capture Data on Multiple Interfaces at the Same Time With Wireshark
Wireshark version 1.8 has a great new feature that allows data to be captured from multiple interfaces at the same time. Since this wasn’t possible in previous versions the only option was to run multiple copies of Wireshark and then merge the captures using Mergecap. Merging captures can be time consuming so I’m really happy […]
Iperf Commands for Network Troubleshooting
Iperf is a very useful utility for network troubleshooting. In this post I’ll share my list of Iperf commands that I have found useful. What is Iperf? Iperf is a network performance utility that can generate both TCP and UDP traffic for testing bandwidth, latency, and packet loss. Iperf is very powerful and can easily […]
Look Out Time Warner: Google Fiber is Coming to Kansas City
Google announced today in their blog that Kansas City, Kansas was selected to be the first location where they will be building their experimental fiber network. If you haven’t heard about this project the basic idea is that Google will offer 1Gbps fiber connections at a competitive price for up to 500,000 people in a […]
How to compile iperf for Windows using Cygwin
Iperf is a very versatile open source program that can be used for network performance testing. It can generate TCP or UDP data streams for measuring network throughput and can also be used for testing network latency and jitter. There are some older versions of iperf compiled for Windows available on the web but I […]
Benchmarking Your DNS Servers to Improve Internet Performance
Benchmark your DNS servers to make your internet experience as fast as possible.
Fighting Spam at the Source With Spamcop
Most people probably just delete spam they receive or install a filter to attempt to block it but that really doesn’t do anything to help prevent future spam. By the time spam reaches your inbox it has already traveled through several mail servers on the internet wasting bandwidth and resources along the way, and most […]
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