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Issue Google Chrome refuses to display DrayTek Vigor 2820 login page over HTTPS connection. The following error is displayed: This webpage is not availableA secure connection cannot be established because this site uses an unsupported protocol.Error code: ERR_SSL_VERSION_OR_CIPHER_MISMATCH
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Copy drivers from one computer to another
If you are having issues trying to find a correct driver for a device on one PC, but have a working driver on another computer, you can easily transfer the driver from one PC to another. Windows stores a copy…
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Connect external VOIP client to Trixbox Asterisk via NAT
Background Tixbox Asterisk VOIP server on company’s LAN network. Remote client with Linksys SPA 942 VOIP phone trying to connect to Asterisk VOIP server via WAN (no VPN). Remote client has a static external IP address 82.67.44.44 SonicWall firewall on…
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Find if permission denied errors are caused by SELinux
SELinux, short for Security Enhanced Linux, is a Linux security module that is part of many Linux server distributions. While SELinux increases server security (despite being created by NSA), it often results in some unexpected access/permission denied errors. If you…
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Host multiple websites on Apache in CentOS
This tutorial shows how to setup Apache Virtual Hosts in CentOS 7. This is useful if you want to host more than one website on a single CentOS web server. For instructions on how to setup Apache, PHP, and SQL database on…
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Fix ‘Leverage browser caching’ Google Webmaster Tools warrning
Google Webmaster Tools “Leverage browser caching” warning can be resolved by adding following to the .htaccess file on your (Apache) web server: ## Browser caching ##<IfModule mod_expires.c>ExpiresActive OnExpiresByType image/jpg “access 1 year”ExpiresByType image/jpeg “access 1 year”ExpiresByType image/gif “access 1 year”ExpiresByType image/png…
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How to determine which server is default time server in Active Directory Domain
In Windows Active Directory Domain, the default authoritative time server is the server holding PDC Emulator (primary domain controller emulator) FSMO role. To find out which server holds PDC Emulator role run: netdom query fsmo Windows Server 2003Windows Server 2008Windows Server 2012…
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Deploy Outlook email templates (stationary) on multiple computers via GP
Microsoft Outlook Personal Stationary feature allows to apply a template for all new emails. This can be enabled in File > Options > Mail > Stationary and Fonts > Personal Stationary > Theme. Outlook themes are standard HTML files and…
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Stop .DS_Store file creation by Mac OS X
Mac OS X has an annoying habit of littering network shares with .DS_Store (Desktop Services Store) files. If you only use Mac OS X and other Unix based systems you may never actually see them, but in mixed environments they can…
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Install and configure CentOS web server (LAMP)
Install CentOS (minimal install). Configure network Run: ip a to find your network adaptor’s name. In my case the adaptor is called ens32. Navigate to /etc/sysconfig/network-scripts/ and open network configuration file with your network adaptor name, i.e. ifcfg-ens32 vi ifcfg-ens32 Edit the file replacing…
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Joomla 3 (Tiny MCE) images displayed without borders
After upgrading to Joomla 3, images in articles on some of my websites started being displayed without borders even when I specified 1px border Tiny MCE editor’s image dialog. Note: code border-width: 1px; in Style field is added automatically by Tiny MCE…
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Batch rename multiple files at once in Windows
Windows File Explorer has some (very limited) capacity to batch rename files. Simply select multiple files, right click on the first one and click Rename. All files will be renamed to your entered string, adding incremental numbers at the end. If…