Author Archive

Password Authentication Takes Another Poke In the Eye

Posted by andy January 19th, 2010

On January 4th as reported on DarkReading and DataBreaches, Lincoln National Corporation notified the New Hampshire Attorney General’s Office of a major security breach affecting 1.2 million people. In addition to the internal cost of investigating the breach and bringing in an external forensics team; in addition to planning and executing [...]

Using route and iptables to proxy traffic

Posted by andy September 10th, 2009

As part of an experiment at work, I wanted to intercept all traffic on port 80 that was headed to a certain IP address. To handle the traffic, I built a python script using BaseHTTPServer based around this sample code and ran it on .202 - one of my CentOS 5.2 boxes.
Next step was to [...]

Converting VMWare 1.0.6 preallocated virtual disks to growable

Posted by andy February 16th, 2009

Running out of space on your VMWare Server? Try this to convert some of your larger preallocated disks to growable. This way they only consume the space on the disk that they currently need, and will not consume disk space on the host drive for disk space on the guest systems whic is in fact [...]

CentOS 5.2 does not install on VMWare Server 1.0.6

Posted by andy February 15th, 2009

This is a known bug inherited from RedHat.
http://rhn.redhat.com/errata/RHSA-2009-0225.html
Workaround is to add
scsi0.virtualDev = “lsilogic”
to the .vmx file before installation.

To read a CD into an ISO on CentOS 5.2

Posted by andy January 2nd, 2009

dd if=/dev/cdrom of=your_image.iso

Mounting the CDRom on Centos 5.2

Posted by andy January 2nd, 2009

Ensure the mount point /mnt/cdrom exists.
To perform the mount:
mount -t auto /dev/cdrom /mnt/cdrom
If the symbolic link /dev/cdrom is not there, then try:
mount -t auto /dev/hdb /mnt/cdrom
replacing hdb with whatever your device is called.

Poking a hole in the CentOS firewall

Posted by andy January 2nd, 2009

With CentOS 5.2 (as ever), use the following to enable a listening tcp port (in this case 8000) to be accessed through the firewall.
sudo /sbin/iptables -A INPUT -p tcp –dport 8000 -j ACCEPT
sudo /sbin/service iptables save
sudo /sbin/iptables -F

Enabling RDP on Windows Vista Home

Posted by andy December 27th, 2008

The instructions for retrofitting Terminal server to Windows Vista Home are here. This enables Remote Desktop to that machine.

Enabling RDP on Windows XP Home

Posted by andy December 27th, 2008

The instructions for retrofitting Terminal server to Windows XP Home are here. This enables Remote Desktop to that machine.

Diagnosing HDD performance under Windows

Posted by andy December 25th, 2008

I have never really found a good way to diagnose HDD performance problems under any version of Windows, especially not Vista. I did, however, recently find this cool util which is a useful tool to keep at hand. Simple install, intuitive GUI and it just works (as admin under Vista). HD Tune