MQTT Protocol Analysis of Himqtt Source Code

MQTT Protocol Analysis of Himqtt Source Code

This article is an excellent piece from the KX Forum Author ID on KX Forum: xiaoduoduo himqtt is the first complete source high-performance MQTT IoT firewall – MQTT Application FireWall, written in C language, using epoll mode to support hundreds of thousands of high concurrent connections for IoT, and is compatible with some ModSecurity rules. … Read more

Comprehensive Analysis of Linux Firewall! Securing the Operating System (Part 2)

Comprehensive Analysis of Linux Firewall! Securing the Operating System (Part 2)

Linux | Red Hat Certification | IT Technology | Operations Engineer 👇 1000-person technical exchange QQ group Note [Public Account] for faster access 1. Firewall Service Management View current active services firewall-cmd –list-service[root@localhost ~]# firewall-cmd –set-default-zone=publicsuccess[root@localhost ~]# firewall-cmd –list-servicessh dhcpv6-client[root@localhost ~]# firewall-cmd –set-default-zone=homesuccess[root@localhost ~]# firewall-cmd –list-servicessh mdns samba-client dhcpv6-client# This allows for a more intuitive … Read more

In-Depth Defense Strategies for Industrial Control Systems

In-Depth Defense Strategies for Industrial Control Systems

1. Introduction As Industrial Control Systems (ICS) face potential threats from remote maintenance, unauthorized operations, malware intrusions, illegal access, and internet connectivity, there are certain vulnerabilities in network boundaries, access control, communication protection, malicious operation control, and malware protection. Therefore, a single protective measure is no longer effective. ICS, as the core of industrial infrastructure, … Read more

Common Firewall Filtering Rules in OpenWrt

Common Firewall Filtering Rules in OpenWrt

Firewall filtering rules in OpenWrt include: 1. Input Filtering Rules: Determine which packets can enter the home network through the router’s network interface, and which packets need to be blocked or discarded. 2. Output Filtering Rules: Determine which packets can leave the home network through the router’s network interface, and which packets need to be … Read more

Configuring Guest WiFi on OpenWRT

Configuring Guest WiFi on OpenWRT

1. Add a New AP Access Point Go to Network –> Wireless page and click the add button for your wireless interface. Create a new network interface in the network section (other settings can be customized). 2. Edit the New LAN Interface After saving and applying, a new interface will appear in Network –> Interfaces, … Read more