tcpdchk

Wietse Venema's TCP wrapper utilities

Install

All systems
curl cmd.cat/tcpdchk.sh
Debian Debian
apt-get install tcpd
Ubuntu
apt-get install tcpd
Arch Arch Linux
pacman -S tcp-wrappers
image/svg+xml Kali Linux
apt-get install tcpd
Windows (WSL2)
sudo apt-get update sudo apt-get install tcpd
Raspbian
apt-get install tcpd
Dockerfile
dockerfile.run/tcpdchk

tcpd

Wietse Venema's TCP wrapper utilities

Wietse Venema's network logger, also known as TCPD or LOG_TCP. These programs log the client host name of incoming telnet, ftp, rsh, rlogin, finger etc. requests. Security options are: - access control per host, domain and/or service; - detection of host name spoofing or host address spoofing; - booby traps to implement an early-warning system.

tcp-wrappers

Monitors and Controls incoming TCP connections