Systems & Networking

All about operating systems, and networking.

Bypassing Virtual Machine Detection on VMWare Workstation

Often times you may run across some nasty software that will refuse to run inside a virtual environment.  Usually malware is the biggest culprit here, but some legitimate programs may also refuse to install if a virtual machine environment is detected.  Fortunately VMware has created a work around to prevent software from detecting a virtual machine. 

Quick and Easy RTMP Flash Streaming Video with Red5 on FreeBSD

Streaming live video via Flash over RTMP can be done on FreeBSD with minimal effort.  We will use the FreeBSD operating system, the Red5 RTMP server, and the Adobe Flash Media Live Encoder.

Setting Up Email Encryption and Signing with Mozilla Thunderbird 3.1

There are many reasons why you'd want to setup secure email communications (aka: encryption), especially given recent freedom of speech, privacy, and censorship issues in Western cultures.  It is useful and now thanks to Mozilla Thunderbird, it's also very easy to configure and use.

Several WHOIS Servers Hacked!

Interestingly, at about 3:00 AM on Sunday April 11 (that is when I noticed it), the WHOIS queries for several high profile domains appear to be hacked. GOOGLE.COM, AMAZON.COM, GODADDY.COM, MICROSOFT.COM, YAHOO.COM, FACEBOOK.COM, etc. Yet several smaller domains, such as UNIBIA.COM, PACYWORLD.COM, VIEWSONIC.COM, and BROADBANDREPORTS.COM are un-affected.

How to Setup DomainKeys Identified Mail (DKIM) with Postfix and Ubuntu Server

If your mail is always ending up in the "Junk" folder (Yahoo is well known for this), take a look at DomainKeys Identified Mail (DKIM). Your email server will sign every outgoing message with a cryptographic private key. Your DNS server is setup with TXT record in the email's domain that contains a matching public key. The receiving end will take the two keys, and determine if they are a match, thus authenticating your email server.

The implementation is very straight forward with Ubuntu Server.

How to Setup DomainKeys Identified Mail (DKIM) with Postfix and FreeBSD

If your mail is always ending up in the "Junk" folder, perhaps it's time to take a look at DomainKeys Identified Mail (DKIM). DKIM is an email authentication framework (or protocol) that tries to minimize the SPAM problem. Your email server will sign every outgoing message with a cryptographic private key. Your DNS server is setup with TXT record in the email's domain that contains a matching public key. The receiving end will take the two keys, and determine if they are a match, thus authenticating your email server.

FreeBSD's FTP Server Doesn't Honor Configuration Values in ftpd.conf

While trying to setup an FTP server on my FreeBSD 7.2 system, for some reason anything I put into the /etc/ftpd.conf file did not work. I wanted to specify a PASSIVE ports range and according to the FreeBSD documentation, the following line in the ftpd.conf file *should* do it.

How to Setup a Reverse Proxy with Squid

A reverse proxy set-up can solve a few problems. For example you can load balance servers, secure a server by hiding it behind a proxy, or load balance an Internet connection. In this HelpFile our goal is to offer access to a server on our private LAN through a higher bandwidth Cable modem connection, but without making changes to our server's network setup.

Windows 7 First Impressions

Microsoft Windows 7 is suppose to undo the Windows Vista failure and make Windows "cool" again. Microsoft has supposedly spent the last 2 years fixing and changing features based on feedback given by it's customers. Now, two years later Windows 7 is ready, and it's being marketed as a "major improvement" over Windows Vista.

Is Windows 7 everything it's hyped up to be?

Fedora's PreUpgrade is Almost Perfect

PreUpgrade works great when your upgrading from a relatively new Fedora install. Systems which started on Fedora prior FC5 made a very small /boot partition by default (only 30MB). This poor planning by the Fedora team pretty much prevents you from using PreUpgrade. For these systems Anaconda or Yum is the only way, unless you re-size your /boot partition.

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