Welcome to Richard's Blog

Category: Network and IT System

  • DNS amplification attack | closing the 53 port on my AdGuard Home Server.

    Today, I turned off the DNS port 53. Since we have been cutting off our store’s DNS server, it has been a DNS amplification attack. So I found out that my Router does have a DNS Proxy, My DNS Server does have HTTP over TLS and DNS-over-HTTPS. Everything is working and attacking is currently stopped after I set up 853 port encryptions and disable Plain DNS. I also want to keep my stores safe.

    Disable Plain DNS and DNS over TLS is 853.

    My router has a DNS Proxy option, so I added my DNS IP Server,

    Then I have gone to Wired Networks → LAN, then go to Admin

    If you change DNS Server to your DNS, please change to Auto So DNS Proxy to do the job.

    Now we have an encrypted DNS over TLS.

  • I have successfully replaced the cracked screen of Anthem Coffee Tablet on Samsung Tab A7 Lite and A8 tablet.

    One of our employees accidentally dropped their tablet while performing work-related tasks. Unfortunately, the device was not equipped with a protective case at the time, which increased the risk of damage. After reviewing the situation, we recognized that this oversight was our responsibility, as we had not provided an adequate protective case to safeguard company equipment from such accidents. Following the incident, I took immediate steps to resolve the issue. I arranged for a professional screen replacement to repair the device, ensuring that the tablet returned to a fully functional and reliable state. Once the screen was successfully replaced and tested to confirm proper operation, I took additional preventative action by equipping the tablet with a high-quality, durable protective case. This case will help to minimize the risk of future damage from accidental drops, contributing to the longevity of the device. Moving forward, our team has acknowledged the importance of providing proper accessories, such as protective cases, for all electronic devices issued to employees. This incident has served as a valuable learning experience, reminding us to prioritize proactive measures to reduce the likelihood of similar accidents and to better support our staff in carrying out their responsibilities safely and efficiently.

  • Another TV wall mount project at Sunrise Village!

    I have removed the television and replaced the screws and anchors. There is a significant amount of dust behind the left-hand TV, and I haven’t yet cleaned the right-hand side. So, I vacuumed from the left to the right, then when we upgraded the TV, I will vacuum from the left to the right, which makes it very convenient. My vacuum is powerful. 🙌

    Coming soon, replace both TV 55 inch so we can read so exciting and ready for it! 📺🖐️📚

    Plan to use these TVs for advertising in the lobby.

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