Baihu Qian 钱柏湖
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    • Secure Home Network - Troubleshoot DHCP Problems

      Posted on January 11, 2020

      Recently, after an EdgeOS upgrade, I started to see intermittent DHCP timeouts from my UniFi controller, mostly from new clients. Then after flushing the DHCP lease, all devices are unable to obtain an IP address, indicating a problem with the DHCP server. [Read More]
      Tags:
      • HomeNetwork
      • EdgeOS

    • Secure Home Network - Extend WiFi Coverage with Multiple APs

      Posted on January 11, 2020

      In many cases, you can get good WiFi coverage with only one Access Point (AP). However, when [Read More]
      Tags:
      • HomeNetwork

    • Secure Home Network - Backup Your Configurations

      Posted on November 23, 2019

      Now, you have already set up your device and your management systems (UniFi Controller and UNMS). Nothing lasts forever so it is important to configure backups so that in an unlikely event of disaster, you can easily restore your device configurations and management systems. [Read More]
      Tags:
      • HomeNetwork

    • How to Mount WD MyCloud on Ubuntu 18.04

      Posted on October 20, 2019

      Although WD MyCloud does not officially support Linux, it uses Samba for network mount. This post will explain how to mount a password-protected WD MyCloud share to Ubuntu 18.04 and enable automatic mount at start up. [Read More]
      Tags:
      • Linux
      • Networking

    • Secure Home Network - Block Ad and Tracking with Pi-Hole

      Posted on September 14, 2019

      [Read More]
      Tags:
      • HomeNetwork

    • How to Setup Passwordless SSH Login

      Posted on September 14, 2019

      Secure Shell (SSH) is a cryptographic network protocol used for secure connection between a client and a server and supports various authentication mechanisms. The two most popular mechanisms are passwords based authentication and public key based authentication. [Read More]
      Tags:
      • Linux

    • How To Enable Passwordless Sudo For A Specific User in Linux

      Posted on September 14, 2019

      This can be configured with the sudoers file in /etc/sudoers. However, it is not recommended to edit this file directly. Instead, as of Debian version 1.7.2p1-1, the default /etc/sudoers file now includes the directive: [Read More]
      Tags:
      • Linux

    • Secure Home Network - Using HomeKit Devices Across VLANs

      Posted on September 10, 2019

      TL;DR Version: Your iOS devices should be able to connect to the HomeKit Devices on port 80 and 443, and mDNS should work between VLANs. [Read More]
      Tags:
      • HomeNetwork
      • EdgeOS

    • Secure Home Network - Using AirPlay Across VLANs

      Posted on September 9, 2019

      In a previous post, I discussed why you should isolate connected devices with VLAN. Smart TVs ideally should be in the Device VLAN, too, instead of your “secure” VLAN. But putting them on a separate VLAN breaks an important TV use case for cord cutters: AirPlay. [Read More]
      Tags:
      • HomeNetwork
      • EdgeOS
      • CordCutter

    • Secure Home Network - Isolating Connected Devices with VLAN

      Posted on September 8, 2019

      Nowadays many devices connect to the Internet besides your computers, phones, and tablets. Those things are often referred as “smart devices” or “IoT”. however, the security standard of IoT devices is quite poor and the devices are prone to hacking. You don’t want hackers to get into your important devices... [Read More]
      Tags:
      • HomeNetwork
      • EdgeOS
      • IoT

    • Secure Home Network - Device and Management Setup

      Posted on September 7, 2019

      Internet connectivity, especially through wireless network, is now a critical utility in our homes. Setting up reliable and versatile wireless network and making it secure is a crucial step at move-in time. [Read More]
      Tags:
      • HomeNetwork
      • EdgeOS

    • Notes: Common Sense on Mutual Funds

      Posted on August 3, 2019

      The longer the time horizon, the less the variability in average annual returns. [Read More]
      Tags:
      • Personal Finance
      • Book

    • Notes: A Random Walk Down Wall Street: The Time-Tested Strategy for Successful Investing

      Posted on April 29, 2019

      I view investing as a method of purchasing assets to gain profit in the form of reasonably predictable income (dividends, interest, or rentals) and/or appreciation over the long term. [Read More]
      Tags:
      • Personal Finance
      • Book

    • 4年AWS工作总结：从 college hire 到 senior 的一点总结

      Posted on April 14, 2019

      本文首发于一亩三分地，本人为原作者。未经许可请勿转载。 [Read More]
      Tags:
      • Career

    • Notes - Secrecy World: Inside the Panama Papers Investigation of Illicit Money Networks and the Global Elite

      Posted on April 14, 2019

      On Tax Havens [Read More]
      Tags:
      • Finance
      • Book
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