I was running an Asterisk server behind NAT without any problems at one location. Due to reoargnization it was moved to a new location and placed behind a pfsense firewall. After a while users reported increasing problems with no sound from the clients. It turned out running a SIP server behind a pfsense can be […]
This is a neat way of centering text in a div. Live demo here. <html> <head> <title>Vertical text center demo</title> </head> <body> <style> .textbox { height: 200px; width: 300px; text-align: center; font-size: 14px; font-weight: bold; background-color: blue; } .textbox p { height: 100%; display: flex; /* vertically center text */ justify-content: center; align-content: center; […]
I had retrieved a harddisk out of a broken laptop containing Windows 10 in order to retrieve some files from it. The harddisk had been removed from the broken laptop and then installed in a HDD enclosure with USB connection. When I connected it to a Windows computer I could browse the Users folder but […]
After upgrading from Ispconfig 3.0 to 3.1 odd things started to happen. For example, when saving a DNS secondary zone it would not store the client selected. Same thing when saving an email domian, client info and spam filter setting just would save. The solution turned out to be simple. Gentlemen – clear your cookies […]
On one of my Ubuntu servers I noticed a significant peak in CPU load (load average, LA) and disk I/O about every hour. At first, I suspected that MySQL was the cause of this, doing some houeskeeping or garbage cleaning. However, it turned out it was caused by the Apache module mod_pagespeed. The high load […]
A client was using the HP Procurve MSM422 / MAP-625 MultiService Access Point (wifi). It was being used in a rather crowded wifi environment and the problem was the wifi clients keept reconnecting and renegotioating so often that the DHCP server was overflowed, sometimes with DHCP requests every few seconds. They had been struggling with […]
Error message “Not a valid image” displayed when trying to upload an image in Joomla! 3.7. The error message is displayed even though the file type being uploded (jpg or png for example) is existing as valid type in both valid file types and mime types fields. Solution: Go to System -> Global configuration -> Media […]
If it’s not possible to remove an item from the cart in PrestaShop 1.6, try this solution: Advanced settings -> Performance -> Move JavaScript to the end = NO The problem seems to occur in Chrome and Microsoft Internet Explorer but not in other browsers like Firefox for example.
A client running PrestaShop 1.6.1.13 with PayPal payment module version 3.11.4 had problems after checkout of orders with an error message saying “699 kr was paid instead of 699 kr”. It turned out it was a rounding error where PrestaShop and PayPal use different methods of calculating the rounding. The solution suggested was: Go to […]
After upgrade to Joomla 3.7.0 an error was displayed when saving an article in the frontend. The error message was “Warning. Empty solution not allowed”. The error message is a bit confusing, not giving any real hint what it is about. It turns out it has to do with Captcha. A new feature in Joomla 3.7.0 […]