When upgrading OpenWrt using sysupgrade, only the header image of the firmware is checked for validity, and the integrity of the firmware is not verified. Therefore, if the firmware has a valid header but other parts are corrupted or modified, it poses a risk, and upgrading could lead to bricking the device. To verify the … Read more
This tutorial has been tested on the OpenWrt soft router system compiled by the author, as well as on the OpenWrt soft router system compiled using Lean’s source code. Other non-Lean source code compiled OpenWrt soft router systems have not been tested, hence this note. 1. Open the disk management of the OpenWrt soft router … Read more
This morning, a user privately messaged me asking how to flash OpenWrt on a CPE I had never heard of before, which left me momentarily stumped. On one hand, the likelihood is 99% that the person asking this question is a beginner. Many people get into OpenWrt because they hear it can flash various firmware, … Read more
<span><span>ubus</span></span> is designed with a concept similar to <span><span>d-bus</span></span> in Linux desktop systems, providing system-level bus functionality. However, compared to <span><span>d-bus</span></span>, it reduces memory usage, making it suitable for the extreme operating environments of low-performance CPUs and low memory in embedded systems. The core component is the <span><span>ubusd</span></span> daemon, which provides an interface for other … Read more
Yesterday, a user privately messaged me asking how to resolve the issue of being unable to access the web page after flashing the OpenWrt firmware on their K2P device. During our chat, it was clear that they had little foundational knowledge, so today I am organizing some thoughts, but you will still need to explore … Read more
In the past, I had a broadband connection with a public IP, and my router was frequently targeted by IP scanning attempts, with persistent attempts to guess my password. It was quite annoying to see a long list of failed login attempts in the logs. Although there were no important devices connected to the router … Read more
The official OpenWRT mirror site for downloading OpenWRT is: URL: https://downloads.openwrt.org/This is the main site for OpenWRT, providing all official versions of firmware and packages. It is the primary source for obtaining the latest stable versions, development versions (snapshots), and historical versions. The official OpenWRT GitHub repository: URL: https://github.com/openwrt/openwrtAlthough primarily used for code storage and … Read more
DNS Forwarding with OpenWrtIn network usage, we sometimes need to specify that certain domain names use a specific DNS server while ensuring that the resolution of other domain names is unaffected.Currently, I am using this setup in an internal corporate network where an Active Directory (AD) domain controller has been established. All domain members perform … Read more
Since many people became familiar with OpenWrt relatively late, there is a common misconception that OpenWrt is synonymous with bypassing restrictions or with bypass routers.However, as a long-time user for over a decade, I have always relied on OpenWrt as my sole router at home.Today, we will share a feature that typically only appears in … Read more
Background Trends Currently, the US-China tariff war is essentially a technology war, with semiconductors becoming the core battlefield. The US’s blockade of semiconductor technology to China (such as restrictions on the export of advanced process equipment) is forcing China to accelerate the self-sufficiency of core technologies. As an open-source instruction set architecture (ISA), RISC-V does … Read more