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andcam/linux open ports

Last active July 24, 2019 12:18
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various methods to find and list open ports
Raw
linux open ports
# tcp ports and services
egrep -w '(80|22|443)/tcp' /etc/services
# netstat list of open ports
sudo netstat -tulp | grep LISTEN
# -t – List all TCP ports on Linux
# -u – List all UDP ports on Linux
# -l – Show only listening sockets/ports
# -p – Show process names (PID) using sockets/ports in Linux
# -n – Do not try to resolve service names (speed up option) using /etc/resolv.conf file
sudo ss -tulpn
sudo lsof -i
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