The reason for “Unable to connect to the Apple Software Update server” took a long time to resolve. It is recommended to try the following steps in order: 1. Automatically obtain time and time zone 2. Change network 3. Modify DNS 4. Modify the hosts file I resolved the issue by modifying the hosts file; … Read more
Old computers that are idle at home can be a headache as they can’t be sold for a good price and their performance doesn’t meet current demands. However, by following these steps, you can make them useful again, earn extra income, and serve as a home server: Install a Lightweight Linux System: Choose a suitable … Read more
Dynamic DNS (DDNS) is a service that allows users to automatically update DNS records when their IP address changes. Typically, Internet Service Providers assign dynamic IP addresses to home or small office networks, meaning the IP address changes periodically. If you run a service that needs to be accessed externally (such as a home server … Read more
Background This article is derived from a previous Weibo post I made: However, the purpose of writing this article is not to help everyone prepare for interviews, but to use this question to introduce basic knowledge of computers and the internet, allowing readers to understand how they are interconnected. For ease of understanding, I will … Read more
In May 2022, Dark Reading reported that researchers from Nozomi Networks discovered that common misconfigurations of the Domain Name System (DNS) in enterprise environments could expose air-gapped networks and their high-value assets to external attackers. A blog post by Nozomi Networks’ ICS analyst team explained that this flaw exists in all versions of the widely … Read more
This experiment is a comprehensive test of HTTP fundamentals and DNS servers. 1, Upload the test file, which is the sogou search homepage downloaded from the internet. 2, First use the IP address range to determine if the HTTP service is functioning normally. 3, Modify the baidu zone file baidu.zone by changing the IP address. … Read more
/ Today’s Tech News / Recently, the China Cybersecurity Association published a statement disclosing frequent security vulnerabilities in Intel CPUs, poor reliability, user monitoring, and hidden backdoors, suggesting that Intel has ignored user complaints and recommending the company to initiate a cybersecurity review. In response, Intel issued a statement emphasizing that product safety and quality … Read more
When we click on a URL and it is displayed in our browser, what exactly happens in the computer and over the network during this process? Server Starts Listening The story actually does not begin when we enter a URL in the browser’s address bar or click on a link; it traces back to when … Read more
Songqin Software Testing Adhering to Educational Original Intention Both Asking About Harvest and Cultivation 1. Request Message Request Message: Request Line (Generally understanding the content of the request) Message Header (Additional information for the request, some regulations for requesting and receiving data) Message Body (Data sent from the client to the server) 2. Response Message … Read more
The embedded Linux system generally supports WiFi networking, which can be achieved through sh scripts or other programming languages. This article introduces the execution principle of a script that configures WiFi using sh scripts. 1. Introduction to sh Script for WiFi Networking Here, we take the WiFi startup script in the Feilin development board as … Read more