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Skip to content Technical Intercourse Electronic bits and software bytes Menu and widgets Illegitimate Code Ones Nought Technical Intercourse Twitter Linkedin Instagram G+ Github Bits and Bytes Two nybbles in a byte makes eight bits. 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It’s a pretty nice machine and nearly everything works right out of the box, with Linux. Unfortunately, one thing that randomly failed regularly, was the WiFi connection. The kernel module would crash rather spectacularly. After some investigation, I attempted various fixes that didn’t work. I tried to turn of 802.11n, which resulted in the WiFi connection running a little longer before it crashed spectacularly. I also tried to install the latest firmware for the driver from Intel, which didn’t have any discernible affect on the system. In the end, the actual fix needed was to disable the HP WMI driver. So, all I had to do was to add in the appropriate blacklist to modprobe. blacklist hp-wmi That did the trick and now my desktop works like a charm. Posted on February 27, 2017 Categories Confused Configs , Network Connections Leave a comment on Linux WiFi on HP Pavillion AIO WolfSSL Server on the Galileo Intel has been kind enough to show us how to use WolfSSL on the Galileo board, but only in a client mode. Turns out that, there are some issues that will be encountered when running a WolfSSL server on the Galileo with the EthernetServer mode. I’ve had to learn this the hard way. Date The EthernetServer will fail to load the server certificate as the internal clock is stuck in the past. Therefore, we need to set the system date of the Galileo board to the present. Since there is no NTP client built into the Galileo 2 board, we are forced to use rdate instead. So, telnet into the Galileo board and run the following command: $ rdate tick.greyware.com I suppose that the best way to do this is to incorporate a system() command into the setup() code of the Arduino sketch to automatically synchronise the date. ECC Support WolfSSL has removed static key based cipher-suites since 3.6.6. Therefore, it needs to be configured to support say, ECDHE based cipher-suites. Unfortunately, this is not automatically enabled during library configuration unless you’re using x86_64, which the Galileo board isn’t. Therefore, the solution is to configure the library with the –enable-ecc option enabled. $ ./configure --prefix=$HOME/wolfssl/ --target=i586-poky-linux-uclibc --host=i586-poky-linux-uclibc --enable-ecc Otherwise, we will face the inability to communicate with the Galileo board when debugging using OpenSSL with the Galileo board complaining that there are no matching cipher suites right after receiving a Client Hello. The Galileo board then teminates the handshake without sending a Server Hello. Posted on November 18, 2015 Categories Chained Tools , Electronic Kits , Open Source Tags galileo , server , wolfssl Leave a comment on WolfSSL Server on the Galileo True Random Number Generator for a True Hacker This is an interesting way to generate a sufficiently random number. We will definitely be adopting this technique for our products that need a non-cryptographic random number generator. Format Gallery Posted on June 30, 2015 Categories Uncategorized Leave a comment on True Random Number Generator for a True Hacker PHP-MCRYPT and Ubuntu 14.04 LTS There is a weird problem with a default Ubuntu 14.04 LTS server installation. For some reason, php-mcrypt couldn’t run when running under FCGI mode using spawn-fcgi . It was correctly installed and configure but it is not detected correctly even under phpinfo(); However, everything seems to be work right after switching over to php-fpm instead of fcgi mode. I don’t know why. Posted on June 11, 2015 Categories Uncategorized Leave a comment on PHP-MCRYPT and Ubuntu 14.04 LTS iFlix on Ubuntu LTS If you are interested to use the new iFlix service on Ubuntu, you will need to install pipelight , since iFlix has decided to use Silverlight instead of HTML5 for it’s video streaming platform. sudo add-apt-repository ppa:pipelight/stable sudo apt-get update sudo apt-get install --install-recommends pipelight-multi sudo pipelight-plugin --update sudo pipelight-plugin --enable silverlight touch $HOME/.config/wine-wininet-installer.accept-license After that, do an about:config on Firefox and the silverlight plugin should show up. It works fairly well on Firefox. However, there are some issues. For one, the player does not position itself properly when the window is resized. As a result, I cannot watch it in a small window. Issues I would like to see a popup-window option enabled for iFlix as I like to watch my videos in a small window in the corner while I do my work on the laptop. Hulu had this great feature. As it is, iFlix requires me to either watch a show or work. It does not allow me to multi-task. They spelt capacity wrong – as “capasity” – on the player settings. This appears when I try to adjust the streaming quality. Quality wise, it is quite obviously heavily compressed. Both the audio and video quality isn’t great even on the “High” settings. As this is my first 30 mins of using the system. I shall reserve judgement until I get to try it out more extensively. However, for RM8/month, I think that I will most likely subscribe assuming that they can supply me the latest shows. Posted on June 4, 2015 June 4, 2015 Categories Confused Configs 7 Comments on iFlix on Ubuntu LTS How to Build Beautiful Enclosures from FR4 — aka PCBs This is an excellent idea! I would love to try it out one of these days. Format Gallery Posted on June 3, 2015 June 3, 2015 Categories Electronic Kits Leave a comment on How to Build Beautiful Enclosures from FR4 — aka PCBs NAT64/DNS64 on OpenWRT The latest stable release of OpenWRT – Barrier Break – makes it a simple matter to add NAT64 and DNS64 capabilities to the router. This is particularly useful if one wishes to run an IPv6 only internal LAN network while dealing with the IPv4 + IPv6 world of the Internet. DNS64 DNS64 provides a faux AAAA record for any existing A record. The easiest tool to use for this is TOTD, which is no longer in development but is found in the main OpenWRT repositories. So, install TOTD and configure it. # opkg update # opkg install totd # vi /etc/totd.conf The totd.conf file should contain the following: ; substitute with your upstream DNS forwarder 8.8.8.8 port 53 forwarder 8.8.4.4 port 53 ; modify your OpenWRT ULA prefix here prefix fd63:fab9:6ccf:64:: ; this port is used later port 5353 Enable and start TOTD, and check the logs for any errors: # /etc/init.d/totd enable # /etc/init.d/totd start # logread Finally, configure the built-in DNSMASQ to use TOTD as its upstream. Just remember to use 127.0.0.1#5353 as the upstream server. Note the use of a hash (#) symbol. You should be able to verify that it works by querying AAAA records for pure IPv4 names. You should see that a fake IPv6 address be returned with your TOTD specified prefix. # ping6 ipv4.google.com You won’t be able to actually ping it over IPv6 yet at thi...