Update: Subnet Calc

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I have improved the subnet calculator a bit (Original Post), it now gives you the wild card for the subnet mask which is used for EIGRP and ACLs etc.

It has helped me with VLSM and subnetting other than class C but it is primarily for Class C addresses.

Download: Subnet Calc.xlsx (18.7kb)

Network Simulator 2 Debain VM

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As part of my MSc I needed to use NS2 and so I went out to install it. The installation is fairly simple if the user understands Linux and is fairly experienced.

With this in mind, I have created a Debain Virtual Machine for people use use, so they don’t need to learn Linux to install it. With it being a VM, it means that, as long as you have VMware installed, it will work on any machine.

System: Debian 6 “Squeeze” i686
User: root
Password: ns123456
Memory: 512mb (Changeable)
HDD: 3GB, of which 1.7GB is used.
Download: Debain NS2.rar (527mb)
Download: VMwarePlayer3.exe (104mb)

Have fun.

P.S. For VMwarePlayer for Linux and OSx, have a look on the VMware site.

Agere Systems Modem

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The “Agere Systems HDA Modem” in many laptops are not voice capable, just so people know as I didn’t and now I do!

Facebook & HTTPS Again

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Well if you had read my previous post, you will know that Facebook’s HTTPS implementation was pretty crap.

Now Facebook has officially rolled out HTTPS, great!

Only problem, currently Apps do not support HTTPS and take the user back to basic HTTP, this wouldn’t normally be a problem but upon test, it doesn’t just put the user to HTTP, it disables the option to use HTTPS in the user option so the user has to turn it back on in the options again and every time they visit an app.

so great implementation that is disabled as soon as HTTPS isn’t used, instead of just temporarily disabling the option then reinstating it where is it supported, they turn it off completely.

So overall you can have security without features or features without security.

How can implementation of a basic protocol that has been around since 1994 be so rubbish that even a basic web developer should be able to grasp?