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rssnsj
173 Stars 50 Forks 125 Commits 4 Opened issues

Description

User-space TCP/UDP port forwarding services

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# 123,150
C
Lua
Shell
44 commits

portfwd

User-space TCP/UDP port forwarding services

Summary

This project contains two applications: tcpfwd, udpfwd, which are for TCP and UDP port forwarding literally. Written in pure C.

Usage

tcpfwd|udpfwd   [-d] [-o]

Options: -d run in background -o accept IPv6 connections only for IPv6 listener -p write PID to file

Examples

Map local TCP port 1022 to 192.168.1.77:22
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
Map local UDP port 53 to 8.8.8.8:53
udpfwd 0.0.0.0:53 8.8.8.8:53
udpfwd [::]:53 8.8.8.8:53
IPv4-IPv6 transforming
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

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