Tag Archives: networking

Not your regular bot driven UDP flood

Posted on 26 April 2013 by stuff writer

After weeks of battling Joomla/JCE sites that insist on running evil code and spewing denial of service traffic, we had a machine today sending UDP floods. This, it turns out, is not a hacked machine sending spews of botnet traffic … Continue reading →

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Compiling Netgear Firmware

Posted on 23 April 2013 by stuff writer

Having ranted about Netgear’s terrible support for their old stuff, I have finally managed after many moons to recompile the software they provide, so that I can brick my router.  The trick is to do the compiling as root on … Continue reading →

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Can’t send mail because of iptables -A FORWARD -p tcp –tcp-flags SYN,RST SYN -j TCPMSS –clamp-mss- to-pmtu

Posted on 18 October 2012 by stuff writer

So, you have a Netgear DGN1000 N150 router or possibly any other Netgear router, and you have it set up with: DSL – VPI=8, VCI=35, LLC, PPPOE Wireless Ethernet One day, as you are sending mail, you notice that mail … Continue reading →

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Creation of a custom virtual machine

Posted on 16 September 2012 by stuff writer

In the beginning, the engineer created the virtual machine. Now the virtual machine was unconfigured, its files sparse, and the engineer pondered how he would set it up. Then the engineer said, “Let’s give this thing a CPU and some … Continue reading →

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Loading progress display with mod_fcgid using mod_deflate

Posted on 17 August 2012 by stuff writer

When you run your processes with mod_fcgid under apache, one of the problems is that you cannot usefully run flush() to send buffered output through to the client. The reason for this is that the fastcgi interface doesn’t have the … Continue reading →

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Hell is bad

Posted on 19 July 2012 by stuff writer

I saw this on the screen today: Thu Jul 19 11:52:59 ~ $ traceroute hell hell: Name or service not known Cannot handle “host” cmdline arg `hell’ on position 1 (argc 1) The computer says it doesn’t know what it … Continue reading →

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Unicast flooding meets promiscuous routing

Posted on 29 June 2011 by stuff writer

To make a disaster, you need a perfect storm of mistakes. A single mistake is insufficient, but a stack of sub-obtimal configuration choices stacked together will give you rampant failure and poor network quality. For today’s mistake we have massive … Continue reading →

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