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I was doing a lot of subnetting (VLSM) within a full class C subnet so I made a simple spreadsheet.

It’s very very simple and if it doesn’t work then tough, it suited me.

Download: Subnet Calc.xlsx (18.7kb)

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.

Have fun.

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

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

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?

Today, I watched a historic moment over a webcast. The release of the final /8 IPv4 addresses (39/8 and 106/8, approximately 33,554,432 IP addresses to RIPE.) which means once those addresses have been allocated to ISP’s, Websites, Servers etc then the internet cannot grow without re-use of unused IP’s.

In the short term, there will be no noticeable difference but in the long term then this will become more of a problem but don’t fret, there is a solution!

IPv6, it’s uptake is slow but steady (or at least according to IANA/ICANN), IPv6 has an addressing space of 3.4×10^38 which is in understandable terms, (340,282,366,920,938,463,463,374,607,431,768,211,456), 340 billion billion billion billion addresses. Compared to the 4billion (4,294,967,296) IPv4 addresses.

So is this the end of an experimental technology which was not meant to last the 35years it has and also the dawn of a new internet era.