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2 common causes for Email Error 551, and How to fix it in MailEnable, Plesk, Outlook, Thunderbird and Eudora

by Reeshma Mathews | Aug 22, 2016 | Plesk, Server Management, Technical Support

Email Error 551 is an SMTP error commonly seen in MailEnable servers, and is seen in two forms: 551 Sender address is not valid for your login and 551 This mail server requires authentication before sending mail from a locally hosted domain MailEnable is widely used...

How to fix PHP FFmpeg error “Unable to load dynamic library ‘/usr/local/lib/php/extensions/no-debug-non-zts-20090626/ffmpeg.so'”

by Reeshma Mathews | Aug 19, 2016 | Server Management, Technical Support

Server wide errors are always a panic situation for server owners. A single server wide error can affect multiple websites in a split-second. To maintain business credibility, its therefore crucial to fix server wide errors promptly. At Bobcares, we do this for...

Easy guide to setup Amazon EC2 multiple IPs

by Reeshma Mathews | Aug 12, 2016 | Server Management

By default, an EC2 instance comes with just a single public IP. However, there are many scenarios where you need multiple public IPs for your web services to work. For instance, multi-site WordPress hosting, multiple websites with SSL, high availability fail-over...

How to mitigate Linux “Off-path” TCP exploits (CVE-2016-5696) in CentOS, RedHat, Ubuntu and Debian

by Visakh S | Aug 12, 2016 | Server Administration, Server Management

If you have a website, chances are that it’s running on a Linux server. And the latest news is that, Linux servers with kernel versions 3.6 to 4.6 are vulnerable to malware injection attacks. This was demonstrated on Aug 10th, when security researchers injected...

How to fix Fatal error: Class ‘PDO’ not found in PHP apps like Drupal, Prestashop, Joomla, etc

by Visakh S | Aug 8, 2016 | Drupal, MySQL, Server Management

Fatal error: Class ‘PDO’ not found is an error seen in websites running PHP applications such as Drupal, Prestashop, WordPress, etc. It’ll look something like this: Fatal error: Class ‘PDO’ not found in...

HTTP/2 is vulnerable to DoS attacks. Here’s how to fix them.

by Visakh S | Aug 7, 2016 | Server Management

Everyone loves fast, secure websites. Google’s SPDY and it’s successor HTTP/2 was seen as a big step towards that goal. As of Aug 6th 2016, 9.1% of websites use HTTP/2, and the trend is seeing a steep rise. All looked good. On Aug 3rd, this smooth ride...
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