Dec 102016
 

First, install the OVF Tool.

Then, run the tool. The syntax looks like this:

If you see errors about virtual hardware not being supported, you can add the –lax parameter to the command line.

Oct 232015
 

I was trying to set up a fail2ban jail for wordpress inside a FreeBSD jail, but I just couldn’t get the rules to match.  The fail2ban instance was running on the host machine, checking a log inside the jail.  Turns out the time zone in the jail was incorrect, and fail2ban was not matching log entries because the time was different.

You may need to restart processes after this – I restarted both syslogd and Apache in the jail.

Sep 262012
 

If you are running a transparent HTTP proxy on your network, you may have trouble with running Internet Recovery and Apple Hardware Test on Macs that support it.  You’ll see a “-4403D” or “-4403F” error.  For some reason, Apple’s servers return a 403 when they see the “via” header that many proxy servers send.  Here’s the configuration I used in Squid to turn off that header.  I also disabled the “forwarded-for” header – essentially, this makes it impossible for servers to determine that the request is coming through a proxy server:

Aug 112012
 

I’ve been trying to install Mountain Lion in as a guest in Parallels 7, and I kept getting stuck at the initial grey Apple logo.

To fix it, I just changed the number of CPUs to 2, and it booted right up.  Other documents I’ve seen have indicated that you need to increase the video memory.  I did not need to do that, but it would probably help with performance.

Aug 032012
 

 

Eclipse Juno looks terrible in Linux Mint 13 with the MATE desktop environment. Here’s an example of part of the screen:

Everything is big and bulky, the tool bar’s style doesn’t really match the theme’s style.

Here are the steps I’ve taken so far to correct this:

  • Create a file called gtkrc, I’ve created one in my ~/eclipse directory:
  • Next, in Eclipse, go to Window -> Preferences -> General -> Appearance, and under Theme, make sure GTK is selected.
  • Run eclipse like this:

This ought to improve it a bit:

More to come as I figure out how to further improve this.

References:

http://xmemory.tompium.com/2012/01/make-eclipse-look-better-on-ubuntu.html

 

 

Nov 182011
 

I needed to return all the members of an object as an XML document in Python. I used the ElementTree library to do this.

The class in question is pretty basic: It has a constructor, member variables, getters and setters for the member variables, and now this new function.

Every Python class has a built-in __dict__ member, which is a dictionary ({}) of key/value pairs for all of the member variables, so I use that to get all of the variables to add to the ElementTree.

This function returns an xml.etree.ElementTree.Element object, which can be turned into a string if needed by using ElementTree’s tostring() method.

Nov 162011
 

Often times, in your Squid proxy, you may have a redirector configured – such as SquidGuard:

I ran into a problem tonight with my Roku box where SquidGuard was seeing Roku’s NetFlix access as a security threat.  So, to make Squid bypass the redirector, add an ACL and a redirector-access rule:

There you have it – any requests to *.netflix.com will skip the redirector.

Nov 062011
 

By default, Squid sends HTTP headers on every request that can give away information about your internal network. Here’s an example of these headers:

That’s three pieces of information you may not want to give away: The host name of your proxy server, the version of Squid it’s running, and the IP address of the system that’s making the request via the proxy.

Fortunately, it’s simple (and does not apparently violate any standards) to make these headers more anonymous – just use these configuration directives in your squid.conf:

That will change the headers to look more like this: