network-diagnostics

Installation
SKILL.md

Network-diagnostics

Instructions

For network troubleshooting:

  1. MTU Issues (common in WSL)
    • Check current MTU: ip link show
    • Test different MTU: sudo ip link set dev eth0 mtu 1350
    • Common WSL MTU: 1300-1400
  2. DNS Resolution
    • Check /etc/resolv.conf
    • Test with: dig google.com, nslookup google.com
    • Try different DNS: 8.8.8.8, 1.1.1.1
  3. Connectivity Tests
    • Ping gateway: ip route | grep default
    • Traceroute to destination
    • Test ports: nc -zv host port, telnet host port
  4. Firewall/Routing
    • Check iptables: sudo iptables -L
Related skills
Installs
62
GitHub Stars
14
First Seen
Jan 24, 2026