An SSH/HTTPS proxy that listens on port 443 and proxies traffic depending on what kind of data it is.

ssh-ssl.js

const net = require('net');

const LISTENING_PORT = 443;
const HTTPS_PORT = 4443;
const SSH_PORT = 22;

var proxySwitch = function(connection) {
    connection.once('data', function(buffer) {
        // A TLS handshake record starts with byte 22.
        if (buffer[0] === 22) {
            // 'tis an SSL connection
            var httpsProxy = net.createConnection(HTTPS_PORT, function() {
                httpsProxy.write(buffer);
                connection.pipe(httpsProxy).pipe(connection);
            });
            errorHandlers(proxy, connection);
        } else {
            // 'tis an SSH connection
            var sshProxy = net.createConnection(SSH_PORT, function() {
                connection.pipe(sshProxy).pipe(connection);
            });
            errorHandlers(proxy, connection);
        }
    });
};

var terminateConnections = function(to, from) {
    to.on('error', function(error) {
        if (error.code != 'ECONNRESET' && error.code !== 'EPIPE')
            console.log('Something weird happened:', error.code);
        to.destroy();
        from.destroy();
    });
};

var errorHandlers = function(proxy, connection) {
    terminateConnections(proxy, connection);
    terminateConnections(connection, proxy);
};


net.createServer(proxySwitch).listen(LISTENING_PORT);