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Securing Ubuntu Server with a free SSL certificate from StartSSL™
Pre-Requirements:
Working LAMP installation with Ubuntu Server. Help is here and here. SSL security is enabled for Apache with Name Based Virtualhosts.
Assumption
Name of the website is www.example.com. Replace it with your correct domain name.
Obtaining a SSL certificate for your website from StartSSL is quite straightforward. Use ExpressLane option from the StartSSL start page and steps will be self explanatory. Here I assume you already created a personal digital certificate, logged in to StartSSL, verified your domain, and created a private key (you can also create your own private key and a CSR yourself from openssl command) and finally downloaded/saved both your server certificate and private certificate files.
Ubuntu, Webserver
Continue reading -
Replacing my HomePlug AV link with a Wireless Client Bridge
I had a Homeplug AV link between my router and and network enabled devices (Raspberry Pi running Raspbmc and a LG-DP1B Media player) in my bedroom. I used the Western Digital Livewire AV Network Kit, which conforms to the Homeplug AV standard. When I moved to a new apartment the performance of the Livewire AV link was degraded significantly. I used to have a consistent throughput around 40Mbps before (out of the maximum possible 200Mbps) in the previous apartment. But with a very old power-circuit in the current apartment and also due to the fact, the living-room, where the router is installed, and the bedroom are connected to two different power-circuits, the sustained throughput obtainable was only around 15Mbps. (Which is actually lower than a good quality 802.11g link)
Home Networking, Networking -
Telia Sweden IPv6 6rd Tunnel with Asus RT-N56U Router
The ipv6-ipv4 dual stack is now enabled for Padavan’s latest firmware for RT_N56U. This post is about firmware ‘RT-N56U_3.0.2.6-018 (en-ru). IPv6+IPv4. Linux kernel 3.0.43‘ Before entering ipv6 details in ipv6 […]
Home Networking, Networking -
How to force SSL in WordPress admin interface
Method-1 If WordPress is installed to a SSL enabled web host, forcing SSL to the admin interface is quite simple. Just add following line in to the main wordpress configuration file ‘wp-config.php‘: […]
Webserver, Wordpress -
Blurring and Unsharp Masking in Java
This java code loads an image and blurs it using a very simple boxcar (rectangular) blurring method. Then it sharpens the image using unsharp mask technique. for more information on unsharp masking see Wikipedia article.
http://en.wikipedia.org/wiki/Unsharp_masking
Parameters you can play with:
(left, top), (right, bottom) defines a selection of original image
usmAmount and usmThreshold defines the unsharp mask parameters
(boxWidth, boxHeight) defines the small box for boxcar filter kernelPlease note: This code is written in the C-like procedural manner using java static methods. Apart from loading and saving images using java Image API functions all the processing is done within the code. Therefore the code can be converted any programming language very easily.
Computing, Java -
Compact Flash based serial (RS232) data logger powered by PIC18F458
Summary This is a complete project with following features: Serial Data (received by built-in RS232 port of the PIC18F) logging with receive date/time Compact Flash data storage Last record display […]
PIC Micro, PIC18
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