Networking Tools

List and cheat sheet for networking tools.

tcpdump

• https://www.tcpdump.org/
• cli packet analyzer

telnet

testing email

$ telnet <ip> 25
EHLO test.example.com
MAIL FROM :<sender>
RCPT TO:<recipient>
DATA
Subject: <subject>
<blank line / enter>
<content here>
<blank line / enter>
.
QUIT

ncat

• https://nmap.org/ncat/
• read and write data

ipcalc / sipcalc

• https://jodies.de/ipcalc
• https://www.routemeister.net/
• calculate ip ranges and ip addresses in that range

iperf

• https://iperf.fr/
• measure bandwith

hping (3)

• https://salsa.debian.org/debian/hping3
• send custom tcp ip packets

dig

• hostname lookup

ss / netstat

• socket statistics
• list all listening ports sudo ss -tulpn

iptables / nftables

• list rules
  • sudo iptables -L
  • sudo nft list ruleset

traceroute

• show routes