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networking

Configure and troubleshoot Linux DNS, reverse proxies, VPNs, and nftables firewalls.

2|Updated Apr 6, 2026
Search Tags:#troubleshooting#vpn#networking#linux#firewall#dns#proxy
One-click install
npx skills add https://github.com/iuliandita/skills --skill networking-iuliandita
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: networking
Source: https://github.com/iuliandita/skills/tree/main/skills/networking
Command: npx skills add https://github.com/iuliandita/skills --skill networking-iuliandita

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill resolves complex Linux networking challenges by providing a structured, safe, and repeatable framework for configuring and debugging infrastructure components like DNS, proxies, VPNs, and firewalls.

Core Features & Use Cases

  • Infrastructure Configuration: Deploy and manage reverse proxies (Caddy, Nginx), VPNs (WireGuard, OpenVPN), and dynamic routing (FRRouting).
  • Diagnostic Methodology: Perform systematic troubleshooting of DNS resolution, firewall rules, and network performance using standard Linux tools.
  • Use Case: When a remote server becomes unreachable after a firewall change, use this Skill to verify the current nftables ruleset, identify the blocking rule, and safely apply a temporary fix before persisting the configuration.

Quick Start

Use the networking skill to diagnose the current DNS resolution path and identify why the domain example.com is failing to resolve.

Frequently Asked Questions about networking

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

FAQPage Schema
How do I troubleshoot DNS resolution failures on a Linux server?▼

Troubleshoot DNS resolution failures by performing a systematic diagnostic check of the Linux network stack using standard tools to trace the resolution path and identify where domain lookups are failing.

What is the best way to safely apply a temporary nftables firewall fix without losing SSH access?▼

Apply a temporary nftables firewall fix by verifying the current ruleset to identify the blocking rule, safely applying the temporary change to restore access, and then persisting the configuration.

Can I use this to configure reverse proxies and VPNs like WireGuard on Linux?▼

Yes, you can configure Linux network infrastructure including reverse proxies like Caddy or Nginx, VPNs like WireGuard or OpenVPN, and dynamic routing using FRRouting.

Why did my remote server become unreachable after a firewall change?▼

Your server became unreachable because the firewall change likely introduced a blocking rule; verify the current nftables ruleset to identify the specific rule blocking your connection.

Do I need administrative privileges to manage Linux network interfaces and firewalls?▼

Yes, you need administrative privileges and access to standard Linux diagnostic tools to manage network interfaces, configure nftables firewalls, and tune network performance.

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