There are a number of TFTP servers available. I had written about atftpd in a related article. Research indicates that tftpd-hpa is another popular tftp server. This article provides a few hints on its installation. Although designed for remote boot capability for PXE (and for handling larger files), I use it mostly for device configuration and image loading. Continue reading "TFTP" »
Monday, November 24. 2008
TTCP: Test TCP
A quick and simple tool for link bandwidth testing (aka Throughput Testing) is included in many flavours of Cisco's IOS. Although it is hidden and officially unsupported, it is documented and functional.
By running 'ttcp' from the command line in privileged mode on two different routers, one can test links between the routers.
Cisco documents the tool with Document 10340, Using Test TCP (TTCP) to Test Throughput. Continue reading "TTCP: Test TCP" »
Sunday, November 23. 2008
Seasonalality Timing System
In Mark Hulbert's November 17, 2008 article called The long-term reasserts itself, he mentions the Seasonality Timing System (STS) designed by Norman Fosback of the Fosback's Fund Forecaster Newsletter. Continue reading "Seasonalality Timing System" »
Friday, November 14. 2008
Receding Recession Indicator
The last time the Dow was at current levels looks to be back in May of 2003. But going back a bit more, it was May of 2002 that the Dow dropped below 10,000. It hit a low of 7600 during the beginning of October 2002. December and January were relatively 'happy' months before the Dow retested 7700 in March 2003. It took a steady rise till December 2003 to cross back above the magic 10,000. The year 2004 saw a few minor dips below 10,000, but nothing serious. October 2007 seeems to have been the recent peak at around 14,000. It declined bit by bit until September/October of this year when it bit the dirt. Continue reading "Receding Recession Indicator" »
Tuesday, November 4. 2008
Debian Lenney Exim Configuration
I can't recall, but I think by default, on a Debian Lenny install, the email server is configured to send email locally only. In order to get it to send email to other servers, the following command needs to be run to reconfigure Exim: Continue reading "Debian Lenney Exim Configuration" »
Monday, November 3. 2008
Multiple Switch Interfaces
Acktomic's genDevConfig creates it's Default files with one interface per view. For switches, it would be nice to see all interfaces presented on one page. To do this, I manually create a file to show these interfaces on one page. Here is a sample config: Continue reading "Multiple Switch Interfaces" »
Cricket Summation
I have a number of routers, each with an interface to an upstream provider. I'd like to show a graph with the three providers aggregated. This is a config I did to do so: Continue reading "Cricket Summation" »
Sunday, November 2. 2008
Governmental Capitalism
The article "Why The Mortgage Crisis Happened" goes into some detail regarding the political background of the current financial situation originating in the US and spreading through out the world. Continue reading "Governmental Capitalism" »
Why The Mortgage Crisis Happened
Written by M. Jay Wells
Continue reading "Why The Mortgage Crisis Happened" »
Saturday, November 1. 2008
MinHeap: C++ Template Implementation of Minimum Heap Algorithm
I am in the process of developing a trading application based in C++. I've realized that it would be useful to test code and algorithms off line, before connecting to a paper-trading system, or even a live scenario. Continue reading "MinHeap: C++ Template Implementation of Minimum..." »