If you are managing websites displaying data from non free third party APIs like stock exchange, geo location or travel agency data, sooner or later you will notice site grabbers trying to load that data from your website. Even more so if the data changes on daily bases. Blocking those can lead to a never-ending task.
Certbot is the new Client from Let’s Encrypt. It’s the successor of the previews letsencrypt-auto Tool. With a simple Webserverconfiguration it’s easy to issue and renew certificates.
Dieser Blog verwendet bereits seit einiger Zeit ein Zertifikat von Let’s encrypt. Die erste Verlängerung ist auch bereits überstanden, alles noch in der Beta Phase. Nun hat Let’s Encrypt verkündet die Beta Phase sei beendet. Kein Grund mehr also Zertifikate von Let’s Encrypt in Produktivsystemen einzusetzen.
Four years ago, the Raspberry Pi Foundation announced the Raspberry Pi Model B. Today it publicized the new Raspberry Pi 3. Equipped with a WiFi Module (802.11n), Bluetooth 4.1 and a 64bit Cortex-A54 CPU with four 1.2Ghz Cores. It’s the fastest Raspberry Pi available to date.
In times were connection speed above 50 Mbit/s are normality, the transfer rate ist often not the issue when it comes to slow loading websites. Modern webpages often load many resources in the background slowing down the composition of the page on the screen.
Sometimes DNS server response times, can have a huge impact on this. Looking for faster name servers might help improve the load time of larger web pages significantly.
In the past Let’s Encrypt was only available via an invitation or by signing up to a waiting list. Starting with today Let’s Encrypt entered public beta meaning everybody can now start creating their own free certificates. General information regarding Let’s Encrypt and the differences over other CAs are covered in the article: “Let’s Encrypt initiative enters beta stage on December 3rd 2015“. Now we will start to create our own free domain validated certificates.
It’s always been a good idea using HTTPS for forms, sending personal data through the web. For many smaller websites and blogs this was often to expensive and to complex to set up. Let’s Encrypt intends to change that.
If we want to secure our own LAMP server or provide web space for friends or customers we would usually use php-cgi and suexec to let the scripts execute with different users. With NginX the setup somewhat differs but with php-fpm pools we can achieve the same sort of additional security.
Sometimes you have to push data using SCP/SFTP/SSH via a VPN connection on a customer server. Especially if Cisco VPN hardware is being used and the files are large, the transfer sometimes is stalled and fails even. This also happens with other hardware as well and may be because of a poor implementation of SACK. It might help to switch SACK of in the kernel network stack.
Because of its lean and fan less design the Raspberry Pi is a perfect piece of hardware to create a simple slideshow system or so called Digital Signage Server (DSS). Perfect to drive a LCD somewhere to teaser the latest offers or new products.