2.0 KiB
Fourth
Hey, now we are on level 4!
Under heavy development, version 0.1 may update frequently
Fourth is a layer 4 proxy implemented by Rust to listen on specific ports and transfer TCP/KCP data to remote addresses(only TCP) according to configuration.
Features
- Listen on specific port and proxy to local or remote port
- SNI-based rule without terminating TLS connection
- Allow KCP inbound(warning: untested)
Installation
To gain best performance on your computer's architecture, please consider build the source code. First, you may need Rust tool chain.
$ cd fourth
$ cargo build --release
Binary file will be generated at target/release/fourth, or you can use cargo install --path . to install.
Or you can use Cargo to install Fourth:
$ cargo install fourth
Or you can download binary file form the Release page.
Configuration
Fourth will read yaml format configuration file from /etc/fourth/config.yaml, and you can set custom path to environment variable FOURTH_CONFIG, here is an minimal viable example:
version: 1
log: info
servers:
proxy_server:
listen:
- "127.0.0.1:8081"
default: remote
upstream:
remote: "tcp://www.remote.example.com:8082" # proxy to remote address
Built-in two upstreams: ban(terminate connection immediately), echo. For detailed configuration, check this example.
Performance Benchmark
Tested on 4C2G server:
Use fourth to proxy to Nginx(QPS of direct connection: ~120000): ~70000 req/s (Command: wrk -t200 -c1000 -d120s --latency http://proxy-server:8081)
Use fourth to proxy to local iperf3: 8Gbps
Thanks
License
Fourth is available under terms of Apache-2.0.