User-space TCP/UDP port forwarding services
User-space TCP/UDP port forwarding services
This project contains two applications: tcpfwd, udpfwd, which are for TCP and UDP port forwarding literally. Written in pure C.
tcpfwd|udpfwd [-d] [-o]Options: -d run in background -o accept IPv6 connections only for IPv6 listener -p write PID to file
tcpfwd 0.0.0.0:1022 192.168.1.77:22 # allow access from all hosts tcpfwd 127.0.0.1:1022 192.168.1.77:22 # only allow localhost tcpfwd [::]:1022 192.168.1.77:22 # allow access to port 1022 via both IPv4 and IPv6
udpfwd 0.0.0.0:53 8.8.8.8:53 udpfwd [::]:53 8.8.8.8:53
udpfwd [::]:1701 localhost:1701 # add IPv6 support for a local L2TP service tcpfwd 0.0.0.0:80 [2001:db8:3::2]:80 # enable IPv4 access for an IPv6-only web service