ombrac 0.6.4

Safe, fast, small TCP tunnel using Rust
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185

# Ombrac

**Ombrac** is a high-performance, Rust-based TCP tunneling solution designed for secure communication

## Features
- **High Performance**: Leverages QUIC's multiplexing capabilities with bidirectional streams for efficient and low-latency transmission.
- **Secure Communication**: Encryption is ensured by the built-in TLS layer of QUIC.
- **Zero-RTT Support**: Optional 0-RTT or 0.5-RTT connections for faster handshakes (at the cost of slightly weakened security).

[![Apache 2.0 Licensed][license-badge]][license-url]
[![Build Status][ci-badge]][ci-url]
[![Build Status][release-badge]][release-url]

## Installation
The easiest way to get started is to download the latest pre-compiled binary from the [Releases Page](https://github.com/ombrac/ombrac/releases).

### Homebrew (macOS & Linux)
```shell
brew tap ombrac/tap && brew install ombrac
```

### From Crates.io
```shell
cargo install ombrac-client ombrac-server --features binary
```

### From Source
```shell
# Clone the repository
git clone https://github.com/ombrac/ombrac.git && cd ombrac

# Build the binaries
cargo build --release --bin ombrac-client --bin ombrac-server --features binary
```

> **NOTE**: On linux systems, [`aws-lc-rs`](https://github.com/aws/aws-lc-rs) will be used for cryptographic operations. A C compiler and CMake may be required on these systems for installation.


### Docker
Pull from GitHub Container Registry
```shell
# Pull the server image
docker pull ghcr.io/ombrac/ombrac/ombrac-server:latest

# Pull the client image
docker pull ghcr.io/ombrac/ombrac/ombrac-client:latest
```

## Getting Started
### Run the Server
```shell
ombrac-server \
  -l "[::]:443" \
  -k "your-secret-key" \
  --tls-cert "/path/to/your/cert.pem" \
  --tls-key "/path/to/your/key.pem"
```

- `-l`: The address to listen on.
- `-k`: The secret key for the protocol.
- `--tls-cert` & `--tls-key`: Paths to your TLS certificate and private key.

### Run the Client
```shell
ombrac-client \
  -s "your-server:443" \
  -k "your-secret-key" \
  --socks "127.0.0.1:1080"
```

- `-s`: The server address to connect to.  
- `-k`: The same secret key used on the server.  
- `--socks`: The local address to bind the SOCKS5 proxy to.  

> ⚠️ Security Warning   
> For testing, you can use `--tls-mode insecure` on the client to skip certificate validation. This is highly discouraged for production environments as it exposes your connection to man-in-the-middle attacks.

### Example with Docker
**Server Container**
```shell
docker run --name ombrac-server \
  --restart always \
  -p 443:443/udp \
  -dit ghcr.io/ombrac/ombrac/ombrac-server:latest \
  -l 0.0.0.0:443 \
  -k secret \
  --tls-mode insecure
```

**Client Container**
```shell
docker run --name ombrac-client \
  --restart always \
  -p 1080:1080/tcp \
  -dit ghcr.io/ombrac/ombrac/ombrac-client:latest \
  -s example.com:443 \
  -k secret \
  --socks 0.0.0.0:1080 \
  --log-level INFO \
  --tls-mode insecure
```

## CLI
### Server
```
Usage: ombrac-server [OPTIONS]

Options:
  -c, --config <FILE>  Path to the JSON configuration file
  -h, --help           Print help
  -V, --version        Print version

Required:
  -k, --secret <STR>   Protocol Secret
  -l, --listen <ADDR>  The address to bind for transport

Transport:
      --tls-mode <TLS_MODE>         Set the TLS mode for the connection tls: Standard TLS with server certificate verification m-tls: Mutual TLS with client and server certificate verification insecure: Generates a self-signed certificate for testing (SANs set to 'localhost') [possible values: tls, m-tls, insecure]
      --ca-cert <FILE>              Path to the Certificate Authority (CA) certificate file for mTLS
      --tls-cert <FILE>             Path to the TLS certificate file
      --tls-key <FILE>              Path to the TLS private key file
      --zero-rtt <ZERO_RTT>         Enable 0-RTT for faster connection establishment (may reduce security) [possible values: true, false]
      --alpn-protocols <PROTOCOLS>  Application-Layer protocol negotiation (ALPN) protocols [default: h3]
      --congestion <ALGORITHM>      Congestion control algorithm to use (e.g. bbr, cubic, newreno) [default: bbr]
      --cwnd-init <NUM>             Initial congestion window size in bytes
      --idle-timeout <TIME>         Maximum idle time (in milliseconds) before closing the connection [default: 30000]
      --keep-alive <TIME>           Keep-alive interval (in milliseconds) [default: 8000]
      --max-streams <NUM>           Maximum number of bidirectional streams that can be open simultaneously [default: 1000]

Logging:
      --log-level <LEVEL>  Logging level (e.g., INFO, WARN, ERROR) [default: INFO]

```

### Client
```
Usage: ombrac-client [OPTIONS]

Options:
  -c, --config <FILE>  Path to the JSON configuration file
  -h, --help           Print help
  -V, --version        Print version

Required:
  -k, --secret <STR>   Protocol Secret
  -s, --server <ADDR>  Address of the server to connect to

Endpoint:
      --http <ADDR>      The address to bind for the HTTP/HTTPS server
      --socks <ADDR>     The address to bind for the SOCKS server
      --tun-fd <FD>      Use a pre-existing TUN device by providing its file descriptor. `tun_ipv4`, `tun_ipv6`, and `tun_mtu` will be ignored
      --tun-ipv4 <CIDR>  The IPv4 address and subnet for the TUN device, in CIDR notation (e.g., 198.19.0.1/24)
      --tun-ipv6 <CIDR>  The IPv6 address and subnet for the TUN device, in CIDR notation (e.g., fd00::1/64)
      --tun-mtu <U16>    The Maximum Transmission Unit (MTU) for the TUN device. [default: 1500]
      --fake-dns <CIDR>  The IPv4 address pool for the built-in fake DNS server, in CIDR notation. [default: 198.18.0.0/16]

Transport:
      --bind <ADDR>                 The address to bind for transport
      --server-name <STR>           Name of the server to connect (derived from `server` if not provided)
      --tls-mode <TLS_MODE>         Set the TLS mode for the connection tls: Standard TLS with server certificate verification m-tls: Mutual TLS with client and server certificate verification insecure: Skip server certificate verification (for testing only) [possible values: tls, m-tls, insecure]
      --ca-cert <FILE>              Path to the Certificate Authority (CA) certificate file in 'TLS' mode, if not provided, the system's default root certificates are used
      --client-cert <FILE>          Path to the client's TLS certificate for mTLS
      --client-key <FILE>           Path to the client's TLS private key for mTLS
      --zero-rtt <ZERO_RTT>         Enable 0-RTT for faster connection establishment (may reduce security) [possible values: true, false]
      --alpn-protocols <PROTOCOLS>  Application-Layer protocol negotiation (ALPN) protocols [default: h3]
      --congestion <ALGORITHM>      Congestion control algorithm to use (e.g. bbr, cubic, newreno) [default: bbr]
      --cwnd-init <NUM>             Initial congestion window size in bytes
      --idle-timeout <TIME>         Maximum idle time (in milliseconds) before closing the connection [default: 30000] 30 second default recommended by RFC 9308
      --keep-alive <TIME>           Keep-alive interval (in milliseconds) [default: 8000]
      --max-streams <NUM>           Maximum number of bidirectional streams that can be open simultaneously [default: 100]

Logging:
      --log-level <LEVEL>  Logging level (e.g., INFO, WARN, ERROR) [default: INFO]

```

## License
This project is licensed under the [Apache-2.0 License](./LICENSE).

[license-badge]: https://img.shields.io/badge/license-apache-blue.svg
[license-url]: https://github.com/ombrac/ombrac/blob/main/LICENSE
[ci-badge]: https://github.com/ombrac/ombrac/workflows/CI/badge.svg
[ci-url]: https://github.com/ombrac/ombrac/actions/workflows/ci.yml?query=branch%3Amain
[release-badge]: https://github.com/ombrac/ombrac/workflows/Release/badge.svg
[release-url]: https://github.com/ombrac/ombrac/actions/workflows/release.yml?query=branch%3Amain