skills.rest
0xMerl99
0xMerl99COMMUNITY
Explore all skills by this author →
GitHub

linux-networking

Configure and troubleshoot Linux network stacks with iptables, nftables, routing, and DNS.

1|Updated Mar 2, 2026
Search Tags:#troubleshooting#routing#networking#linux#firewall#iptables#nftables
One-click install
npx skills add https://github.com/0xMerl99/FangAI --skill linux-networking
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: linux-networking
Source: https://github.com/0xMerl99/FangAI/tree/main/crates/openfang-skills/bundled/linux-networking
Command: npx skills add https://github.com/0xMerl99/FangAI --skill linux-networking

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill provides expert guidance for configuring, securing, and troubleshooting Linux network stacks, addressing complex networking challenges in various environments.

Core Features & Use Cases

  • Firewall Management: Expert advice on iptables and nftables for robust network security.
  • Routing & DNS: Comprehensive support for policy-based routing and DNS resolution troubleshooting.
  • Network Diagnostics: Practical techniques using tools like tcpdump and ss for in-depth analysis.
  • Use Case: A system administrator needs to set up a secure network for a new server, including specific port forwarding rules and ensuring only authorized traffic can reach the machine.

Quick Start

Use the linux-networking skill to configure a default-deny firewall using nftables.

Frequently Asked Questions about linux-networking

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I configure a default-deny firewall using nftables in Linux?▼

Configuring a default-deny firewall using nftables involves structuring rules to drop all unauthorized traffic by default. The Skill provides expert guidance on nftables syntax to establish robust network security and permit only explicitly allowed connections.

What is the best way to troubleshoot Linux routing and DNS resolution issues?▼

Troubleshooting Linux routing and DNS issues requires diagnostic tools like tcpdump and ss for in-depth packet flow analysis. The Skill offers production-grade techniques to identify and resolve policy-based routing and DNS resolution failures.

How does Linux kernel packet flow work when managing iptables and nftables rules?▼

Linux kernel packet flow dictates how packets traverse network stacks and encounter firewall rules. The Skill explains kernel packet flow mechanisms to help you effectively implement and secure iptables and nftables configurations.

Can I use this guidance for setting up port forwarding on a production Linux server?▼

Yes, you can apply this guidance to set up production Linux server networks, including specific port forwarding rules. The Skill delivers expert advice for configuring network stacks and ensuring only authorized traffic reaches your machine.

Why is my Linux network configuration not working after applying new iptables rules?▼

Linux network configuration may fail after applying new iptables rules due to incorrect firewall syntax or routing conflicts. The Skill provides diagnostic techniques using tools like ss to analyze kernel packet flow and troubleshoot misconfigurations.

Related Skills

Explore More Software Engineering Skills→
automateyournetworkautomateyournetwork
627

pyats-linux-network

Inspect network interfaces, routing tables, and connection states on Linux hosts using pyATS.

Community
Intermediate
jassicsjassics
6

network-segmentation-review

Review network segmentation and firewall/ACL design for security.

Community
Intermediate
openeuler-mirroropeneuler-mirror
3

kernel-fuse-diagnosis

Diagnose FUSE kernel faults by analyzing mount points, connection states, and daemon behavior.

Official
Advanced
rfdiosuaorfdiosuao
30

linux-networking

Provides guidance for diagnosing and configuring Linux networking, including firewalls and routing.

Community
Advanced