After a couple of hours of experimentation, I was finally able to establish a connection without being in the DMZ. So that others who may happen to fall into the same situation have a solution, I am providing it here.

The very first thing you must do is to open your D-Link Admin screen, click the Advanced tab on top, and open the Inbound Filter on the left. You’ll need to create a new filter using the IP address where your VPN connects to. You can easily find this by looking at your D-Link log right after an unsuccessful  connection attempt (you’ll see the blocked attempt). An example of an Inbound Filter is given here but with my IP partially blocked. My source range is for one IP address. Pay attention to the ‘Name’ given, it will be used again.

After saving your inbound filter, you now need to open the Port Forwarding item on the left of your screen. You will then add a new rule to forward UDP ports 500 through mach zehnder modulator5000 65536 to your local machine using the filter created in the previous step. Its actually pretty easy because the filter name will be in the drop-down list for the Inbound Filter item. Take a look at this example screen shot:

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Save your settings and you should now be able to use your Cisco VPN connection without resorting to using the DMZ.

Fortran: Staying Up to Date

In an industry when things change at GHz speeds, there’s solace in the permanance of tools like Fortran, which has been around since…what, the 1950s? Well “yes,” now that I think about it. John Backus spec’d out the “IBM Mathematical Formula Translating System” in the early 1950s, and delivered the first Fortran compiler in the late 1950s, or thereabout.

Mr. Backus was my kind of guy. When asked many years later why he created Fortran in the first place, he responded that “much of my work has come from being lazy.” He went on to add that “I didn’t like writing programs, and so, when I was working on the IBM 701 (an early computer), writing programs for computing missile trajectories, I started work on a programming system to make it easier to write programs.”

What brought all this to mind is the note from Absoft that it has released the first commercial Fortran IDE for Windows and Linux (and MacOS not far behind). The IDE, which comes bundled with Absoft’s Pro Fortran 10.1 tool suite, supports development for multi-core processor from Intel and AMD by providing auto-parallelization and auto-vectorization. According to Absoft, performance tests with Pro Fortran 10.1 auto-parallelizing and auto-vectorizing compilers have demonstrated superscalar speed improvements on several industry benchmark programs. With the IDE, tools can be run from the GUI or the command line. It also accepts select third-party tools, such as compilers from Apple, GNU, and Microsoft and VNI’s IMSL numerical libraries.

There you have it. Even at 50 years old, Fortran is kicking up its heels. Which makes me wonder: What do you think Ruby or C# will look like 50 years from now?

– Jonathan Erickson
jerickson@ddj.com

Another good Fortran article worth a read locate at Dr. Dobb’s is Fortran and IMSL: It’s MacOS’s Turn

eHarmony spurns Microsoft, finds match with Oracle 10g

Physical file fragmentation can hinder SQL Server’s performance. Learn how Diskeeper can help resolve this problem. By Howard Butler Sr. and Michael Materie.

Source: Keeping Your SQL Server Databases Defragmented With Diskeeper (Updated)
Originally published on 5/17/2007 4:11 PM