Linux UpSkill Challenge Day 9 - Networking

Source

• https://linuxupskillchallenge.org/09/
• https://www.youtube.com/watch?v=47BWW-SyAa8

Port knocking

• https://wiki.archlinux.org/title/Port_knocking
• https://en.wikipedia.org/wiki/Port_knocking

netstat / ss

• netstat command examples

Note

Split into its own note: netstat + ss reference

• iptables logging

Sadservers challenges

• https://sadservers.com/scenario/tokyo
• https://sadservers.com/newserver/taipei
  • nmap -PS -p1-65535 localhost: TCP SYN to ports 1-65535 on localhost
  • nmap -p- localhost: faster way, -p- scans all ports

nmap

nmap reference

Linux Sysadmin Basics - File Permissions

• Video

Info

Refer to Linux UpSkill Challenge Day 14 - Who has permission

Bash keyboard shortcuts

Info

Split into its own note: bash keyboard shortcuts

EOF