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Change Domain for WordPress Docker Container with phpMyAdmin

Are you trying to migrate an existing WordPress Docker container to a new domain URL? One might change domain for a couple of reasons. For example, change in brand name, favorite domain in .com becomes available or change to different...

Setup Cheap Self-Hosted WordPress with Domain for just $7/year

Do you know the difference in service provided between wordpress.com vs wordpress.org? You can register for a free hosted blog at wordpress.com with limited features or you can subscribe to their paid plans to unlock them. However, at wordpress.org, you...

Host Multiple Websites with jwilder nginx-proxy and letsencrypt-companion

Introduction Two years ago, in 2018, I was introduced to Docker by a colleague of mine who was a brilliant programmer. Thus, I started my Docker journey on my own by reading tutorials online. I was developing a WordPress website...

How to Backup Databases and Files, Rotate and Rsync to Remote

We should always schedule backups for our website files and databases but should never keep the backups only in the server which your websites and databases reside in. If you are on solid cloud providers like Amazon Web Services (AWS)...

Set Up DKIM, SPF and Reverse DNS to Improve Mail Deliverability

Introduction DomainKeys Identified Mail (DKIM) is a protocol that contributes to DMARC compliance and requests the sender origin to take responsibility for sent messages that can be verified by mailbox providers. Essentially, it enables the outbound domain to digitally sign...

Using Ansible to Automate Deployment for Apps and IT Infrastructure

Introduction Ansible is one of the few configuration management tools in the DevOps environment. It is an infrastructure automation platform used to deploy our applications and systems rapidly to enable continuous integration and continuous deployment. While there are others like...

Father’s Day 2020 with My Family

This would be my seventh Father's Day. OMG, how times flies! My family (wife, daughter and later son) would celebrate Father's Day without fail for me every year. There would be cards from my daughter and/or cake from my wife....

What is Clickjacking and How to Prevent It

Clickjacking, according to Wikipedia, is a malicious technique of tricking a user into clicking on something different from what the user perceives, thus potentially revealing confidential information or allowing others to take control of their computer while clicking on seemingly...

My Supercharged Home Network for Gaming and WiFi Coverage

After getting the keys to my new home, a certain thing is always on my mind during renovation and it was network planning. I am a PC gamer having spent most of my time on online games thus low network...

Automated Checks: Send Email when Product in Stock

Introduction Have you ever wanted to buy that pretty dress or gadget really bad but disappointed at it being currently out of stock? Then, you check the listing once every few hours in hope to snap it up when it...
How to Merge Server-side and Docker iptables Firewall Rules

How to Merge Server-side and Docker iptables Firewall Rules

Posted by By Mike Goh April 30, 2020Posted inDevelopers Technical TutorialsTags: Docker, Firewall, Security, ServersNo Comments
Introduction Docker is widely used to place applications in containers. One of the reasons why Docker is so popular is because of security thanks to its isolation capabilities. For example, it allows you to isolate applications from each other. Installing…
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Family Danced with Joy with Revived Wii and New Games Reloaded

Family Danced with Joy with Revived Wii and New Games Reloaded

Posted by By Mike Goh April 28, 2020Posted inDaily Rants and Excitement BlogTags: Family, FunNo Comments
Background When Wii was launched in United States in November 2006, I was with two colleagues in Las Vegas to support our local brand Creative at the Consumer Electronic Show (CES). We had like two days of rest at San…
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Host Website on IPv6 NAT VPS with Cloudflare DNS and NGINX

Host Website on IPv6 NAT VPS with Cloudflare DNS and NGINX

Posted by By Mike Goh April 26, 2020Posted inDevelopers Technical TutorialsTags: DNS, NGINX, WebNo Comments
Introduction Cloud services like AWS, DigitalOcean and lesser-known VPS hosting providers sell VM (Virtual Machines). The annual price can range from $20 (less-known providers) to $70 for cloud services like AWS. All VM plans come with 1 dedicated IPv4 address…
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How to Resolve iptables: No chain/target/match by that name

How to Resolve iptables: No chain/target/match by that name

Posted by By Mike Goh April 24, 2020Posted inDevelopers Technical TutorialsTags: DNS, FirewallNo Comments
Introduction If you encounter such error, it means that the CONFIG_NETFILTER module was not complied in your kernel. All VPS (virtual private server) that I owned from DigitalOcean, AWS, Google Cloud and other lesser-known host providers have it by default…
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Change Port and Disallow Root Login to Secure SSH Server

Change Port and Disallow Root Login to Secure SSH Server

Posted by By Mike Goh April 24, 2020Posted inDevelopers Technical TutorialsTags: Network, Security, ServersNo Comments
When you subscribe to a Linux VPS (Virtual Private Server) from any host providers, the default firewall rule is to accept all incoming connections to any ports hence you can connect via Port 22 using a SSH telnet client like…
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How to Secure Server with Firewall using iptables

How to Secure Server with Firewall using iptables

Posted by By Mike Goh April 23, 2020Posted inDevelopers Technical TutorialsTags: Firewall, Security, ServersNo Comments
iptables is a command-line firewall utility that allows a system administrator to configure the IP packet filter rules made possible by the Netfilter modules complied into the Linux Kernel. The rules are kept to a bare minimum on the firewall…
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My Supercharged Home Network for Gaming and WiFi Coverage

My Supercharged Home Network for Gaming and WiFi Coverage

Posted by By Mike Goh April 20, 2020Posted inDaily Rants and Excitement BlogTags: Family, NetworkNo Comments
After getting the keys to my new home, a certain thing is always on my mind during renovation and it was network planning. I am a PC gamer having spent most of my time on online games thus low network…
Read More
How to Backup Databases and Files, Rotate and Rsync to Remote

How to Backup Databases and Files, Rotate and Rsync to Remote

Posted by By Mike Goh April 19, 2020Posted inDevelopers Technical TutorialsTags: Backup, Command line, DatabaseNo Comments
We should always schedule backups for our website files and databases but should never keep the backups only in the server which your websites and databases reside in. If you are on solid cloud providers like Amazon Web Services (AWS)…
Read More
What is Clickjacking and How to Prevent It

What is Clickjacking and How to Prevent It

Posted by By Mike Goh April 18, 2020Posted inDevelopers Technical TutorialsTags: CSS, NGINX, Security, WebNo Comments
Clickjacking, according to Wikipedia, is a malicious technique of tricking a user into clicking on something different from what the user perceives, thus potentially revealing confidential information or allowing others to take control of their computer while clicking on seemingly…
Read More
Learned a New Word Today – ‘Clickjacking’

Learned a New Word Today – ‘Clickjacking’

Posted by By Mike Goh April 17, 2020Posted inDaily Rants and Excitement BlogTags: CSS, SecurityNo Comments
Recently, I received an email from my supervisor asking me to do an assessment on a bug. The whole story unfolded as I scrolled down the email conversation. It was a web security vulnerability actually and it was originally reported…
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