Trojan-Go

Trojan proxy written in golang. It is compatiable with the original Trojan protocol and config file.

It's still currently in heavy development.

README_zh_cn.md(中文(简体))

Usage

./trojan-go -config your_awesome_config_file.json

Trojan-Go supports most features of the original trojan, including

TLS tunneling
Transparent proxy (NAT mode)
UDP Relaying
Mechanism against passive and active detection of GFW
MySQL Database support
Traffic statistics, quota limits for each user
Authentication by users record in database
TCP performance-related options, like TCP fast open, port reusing, etc.

Note that the name of the TLS 1.2 cipher suite is slightly different in golang. Using the original configuration file directly will cause a warning, but it will not affect the running. See wiki for more information.

The format of the configuration file is compatible, see here.

Features

Compatible

It's fully compatible with the Trojan protocol and configuration file, so that you can safely replace your client and server program with trojan-go, or even just replace one of them, without additional configuration.

Easy to use

Trojan-go's configuration file format is compatible with Trojan's, while it's being simplyfied. Unspecified fields will be filled in with a default value. You can launch your server and client much more easily. Here's an example:

server.json

{
	"run_type": "server",
	"local_addr": "0.0.0.0",
	"local_port": 443,
	"remote_addr": "127.0.0.1",
	"remote_port": 80,
	"password": [
		"your_awesome_password"
	],
	"ssl": {
		"cert": "your_cert.crt",
		"key": "your_key.key",
        "sni": "your_awesome_domain_name"
	}
}

client.json

{
    "run_type": "client",
    "local_addr": "127.0.0.1",
    "local_port": 1080,
    "remote_addr": "your_awesome_server",
    "remote_port": 443,
    "password": [
	    "your_awesome_password"
    ],
    "ssl": {
        "cert": "your_cert.crt",
        "sni": "your_awesome_domain_name"
    }
}

run_type supported by Trojan-Go (the same as Trojan):

Client
Server
NAT (transparent proxy, see here)
Forward

For more infomation, see Trojan's docs about the configuration file.

Multiplexing

TLS handshaking may takes much time in a poor network condition. Trojan-go supports multiplexing(smux), which imporves the performance in the high-concurrency scenario by forcing one single TLS tunnel connection carries mutiple TCP connections.

Enabling multiplexing does not increase the bandwidth you get from a speed test, but it will speed up the network experience when you have a large number of concurrent requests, such as browsing web pages containing a large number of images, etc.

Note that this feature is not compatible with the original Trojan , so for compatibility reasons, this feature is turned off by default. But you can enable it by setting the "mux" field in the tcp options. as follows

"tcp": {
    "mux": true
}

for example

client.json

{
    "run_type": "client",
    "local_addr": "127.0.0.1",
    "local_port": 1080,
    "remote_addr": "your_awesome_server",
    "remote_port": 443,
    "password": [
	    "your_awesome_password"
    ],
    "ssl": {
        "cert": "server.crt",
        "sni": "your_awesome_domain_name"
    },
    "tcp": {
        "mux": true
    }
}

You only need to set the client's configuration file, and the server will automatically detect whether to enable multiplexing.

Portable

It's written in Golang, so it will be statically linked by default, which means that you can execute the compiled single executable directly on the target machine without having to consider dependencies. You can easily compile (or cross compile) it and deploy it on your server, PC, Raspberry Pi, or even a router.

Build

Just make sure your golang version >= 1.11

git clone https://github.com/p4gefau1t/trojan-go.git
cd trojan-go
go build

You can cross-compile it by setting up the environment vars, for example

GOOS=windows GOARCH=amd64 go build -o trojan-go.exe

or

GOOS=linux GOARCH=arm go build -o trojan-go

License

MistShi/trojan-go

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