Visitor Access Management is a tricky subject for security experts. This is especially true for secure locations such as hospitals, schools, and office buildings. Visitor management has two sides to it – location security and visitor hospitality. Neither do you want to compromise the security of your premises nor do you want any visitor to

Finding a reliable PDF editor is often a lot more difficult than most people realize as there aren’t that many options out there. Most of the online or free editors that are available have lots of limitations, and the more professional editors come with a hefty price tag. That is why if you want a

Today, I received the email, regarding the life of Ubuntu 17.10. You will see it is end of life on July 19, 2018, means Today. If you are still using Ubuntu 17.10, you would better to upgrade to Ubuntu 18.04. This is a follow-up to the End of Life warning sent earlier this month to

I have my D-Link DIR-880L router for almost one and half years. I flashed the firmware to use DD-WRT one. Later I flashed back to D-Link firmware. The latest version is 1.08 on D-Link Canadian website. I upgraded it long time ago. On the D-Link support forum, it shows an updated version of firmware is

I tried a IPv6 only VPS. It has no IP v4 address. It is always error  connection when I tried to use an IP v6 to connect it. Here is some new knowledge for me. Use a pair around the IPv6 address when using it in the Browser address . The correct format is:

When Google Penguin 4.0 was released in October of 2016, one of its main goals was to target and reduce the rank for sites that were found to have poor links. While the Internet search engine giant’s intention was to improve user experience and de-index spammy sites, some webmasters with legitimate websites took a hit.

Now it is a php 7.2. Included in the Ubuntu 18.04. My site is running on this platform. I also want to try to run the php Benchmark test, and see how fast it is.   -------------------------------------- | PHP BENCHMARK SCRIPT | -------------------------------------- Start : 2018-06-07 11:38:41 Server : webexample.win@50.116.5.237 PHP version : 7.2.5-0ubuntu0.18.04.1 Platform

My site is moved to another VPS, but still with Linode. This time, it is at Fremont, CA. As I mentioned in my last post, the CPU is E5-2697 v4. There is a few changes on the default VPS. Turn on BBR. php opcache cache size from 128MB to 256MB MariaDB default collection from utf8mb4_general_ci

Recently I placed an order of a new VPS at Linode. It has a new CPU type. Intel(R) Xeon(R) CPU E5-2697 v4 @ 2.30GHz, 1 cores Another VPS I bought with Linode from July 2017, has Intel(R) Xeon(R) CPU E5-2680 v2 @ 2.80GHz, 1 cores Let me check these difference between E5-2697 v4 and E5-2680

When I upgrade my php to php 7.2, I saw a lot of error log in the log file. [error] 1502#1502: *625 FastCGI sent in stderr: “PHP message: PHP Warning: count(): Parameter must be an array or an object that implements Countable in /<purged>/wp-content/plugins/w3-total-cache/Cdn_Plugin.php on line 1203” while reading response header from upstream, client: 135.0.172.188,