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Posts by Mike Goh

About Mike Goh
GSM, Owner of Techsch.com. IT backbone of Techsch.com, when he's awake. Personal hobbies include extreme activities such as sleeping and headbanging. His computer keyboard bears witness to his utter dedication in these two pastimes.
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: Command Line, SecurityNo 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: 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: 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…
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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 LineNo 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)…
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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: NGINX, SecurityNo 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…
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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: 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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How to Backup WordPress Database and Directory Docker Containers

How to Backup WordPress Database and Directory Docker Containers

Posted by By Mike Goh April 16, 2020Posted inDevelopers Technical TutorialsTags: Backup, Docker, WordPressNo Comments
In this tutorial, I am going to show you how to backup Docker containers for services WordPress and MySQL in a docker-compose.yml file. If you read enough backup articles like me, you will find that some articles relate to just…
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Which Top-level Domain (TLD) for you, Sir?

Which Top-level Domain (TLD) for you, Sir?

Posted by By Mike Goh April 14, 2020Posted inSoftware and Web Services ReviewsTags: Domain DNS, WebNo Comments
I was working from home (WFH) for a month because of COVID-19. I decided to spin off a tech tutorial website powered by WordPress. This has always been on my mind but I never really did have the time. It…
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Change Domain for WordPress Docker Container with phpMyAdmin

Change Domain for WordPress Docker Container with phpMyAdmin

Posted by By Mike Goh April 14, 2020Posted inDevelopers Technical TutorialsTags: Docker, Domain DNS, WordPress1 Comment
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…
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