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Details

Search and replace accidentally also renamed the original crate, called
fourth. But attributions should be correct.

Signed-off-by: Jacob Kiers <code@kiers.eu>

2024-06-19 21:59:19 +02:00

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l4p

Hey, now we are on level 4!

l4p is a layer 4 proxy implemented by Rust to listen on specific ports and transfer TCP data to remote addresses (only TCP) according to the configuration.

Features

Listen on specific port and proxy to local or remote port
SNI-based rule without terminating TLS connection
DNS-based backend with periodic resolution

Installation

To gain best performance on your computer's architecture, please consider build the source code. First, you may need Rust tool chain.

$ cd l4p
$ cargo build --release

Binary file will be generated at target/release/l4p, or you can use cargo install --path . to install.

Or you can use Cargo to install l4p:

$ cargo install l4p

Or you can download binary file form the Release page.

Configuration

l4p will read yaml format configuration file from /etc/l4p/l4p.yaml, and you can set custom path to environment variable L4P_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

There are two upstreams built in:

Ban, which terminates the connection immediately
Echo, which reflects back with the input

For detailed configuration, check this example.

Thanks

fourth, of which this is a heavily modified fork.

License

l4p is available under terms of Apache-2.0.

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