Node.js - 将所有流量从端口A转发到端口B. [英] Node.js - forward all traffic from port A to port B
问题描述
我正在尝试将所有流量从端口6999转发到端口7000(我知道我可以使用iptables,但我的想法是使用Node.js进行一些数据包检查)。
I'm trying to forward all traffic from port 6999 to port 7000 (I know I could use iptables, but the idea is to use Node.js to do some packet inspection).
以下是我的代码:
var net=require('net');
var compress=require('./node-compress/compress');
var ip='172.16.1.224';
var ipPort=6999;
var opPort=7000;
var output=net.createServer(function(connOut){
var input=net.createServer(function(connIn){
connIn.pipe(connOut);
});
input.listen(ipPort,ip);
});
output.listen(opPort,ip);
它似乎不起作用。当我在端口7000上执行tcpdump时,没有任何显示。有人有什么建议吗?
It just does not seem to work. When I do a tcpdump on port 7000, nothing shows up. Anyone have any suggestions?
非常感谢提前,
推荐答案
这是我的理由:
支持从命令行提供from和to,并支持远程机器。
Supports giving the "from" and "to" from command line, and supports remote machines.
var net = require('net');
// parse "80" and "localhost:80" or even "42mEANINg-life.com:80"
var addrRegex = /^(([a-zA-Z\-\.0-9]+):)?(\d+)$/;
var addr = {
from: addrRegex.exec(process.argv[2]),
to: addrRegex.exec(process.argv[3])
};
if (!addr.from || !addr.to) {
console.log('Usage: <from> <to>');
return;
}
net.createServer(function(from) {
var to = net.createConnection({
host: addr.to[2],
port: addr.to[3]
});
from.pipe(to);
to.pipe(from);
}).listen(addr.from[3], addr.from[2]);
(另存为proxy.js)
(save as proxy.js)
从localhost转发:9001 => localhost:80
To forward from localhost:9001 => localhost:80
$ node proxy.js 9001 80
或localhost:9001 => otherhost:80
Or localhost:9001 => otherhost:80
$ node proxy.js 9001 otherhost:80
(这是基于Andrey的回答,谢谢!)
(This was based on Andrey's answer, thanks!)
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