DNSWalk : Help Resolve Microsoft Windows DNS Issues And Resolution Failures

On April 9, 2013, in How-to, by Cubert aka (Cube Dweller)

Microsoft DNS Server Cannot Resolve Some Domain Names Externally

DNSWalk is a small windows application that queries all ROOT servers and all returned Top Level Domain (TLD) servers for the FQDN requested. This allows you to see what is being returned to you from all root hint servers and all Top level DNS server.

Download -> DNSWalk-1.0

If you run DNSWalk on a Windows DNS server it… Continue reading

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Buffer Bloat, a minis to the TCP protocol

On April 8, 2013, in Rants, by Cubert aka (Cube Dweller)

Today I would like to take a minute of your time and talk about Bandwidth usage and a little known  phenomenon called Buffer Bloat.


What is Buffer bloat and what does it effect?


Buffer bloat is the product whereby excess buffering of packets inside the network causes high latency and jitter, as well as reducing the overall network throughput. Buffer bloat occurs when a network link becomes congested, causing packets to… Continue reading

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I just recently ordered a new Netgate FW-7541 for our COLO that I will be using in a fail over setup. The Netgate nanoBSD build is not bad but has a few limits on packages that we wanted to overcome and also Netgate does not keep up with the PFSense updates as quickly so they are still at PFSense 2.0.1. We want our box to be running PFSense 2.0.2 so… Continue reading

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