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https://github.com/thomseddon/udp-replicator
A tiny UDP proxy that can replicate traffic to one or more endpoints.
https://github.com/thomseddon/udp-replicator
go golang udp udp-proxy udp-redirect udp-relay udp-server
Last synced: 17 days ago
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A tiny UDP proxy that can replicate traffic to one or more endpoints.
- Host: GitHub
- URL: https://github.com/thomseddon/udp-replicator
- Owner: thomseddon
- License: mit
- Created: 2019-09-23T14:38:57.000Z (about 5 years ago)
- Default Branch: master
- Last Pushed: 2024-04-17T08:20:13.000Z (7 months ago)
- Last Synced: 2024-08-07T23:57:23.419Z (3 months ago)
- Topics: go, golang, udp, udp-proxy, udp-redirect, udp-relay, udp-server
- Language: Go
- Size: 6.84 KB
- Stars: 49
- Watchers: 5
- Forks: 21
- Open Issues: 4
-
Metadata Files:
- Readme: README.md
- License: LICENSE.md
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README
# UDP Replicator [](https://goreportcard.com/report/github.com/thomseddon/udp-replicator)
A tiny UDP proxy that can replicate traffic to one or more endpoints.
## Why?
We needed a way to take a single netflow stream and send it to multiple endpoints. As this is a generic UDP replicator, it can be used for any traffic such as netflow, syslog etc.
You could use iptables, [like Zapier](https://zapier.com/engineering/iptables-replication/), but we wanted something we could easily deploy into our kubernetes cluster. There are also a number of existing UDP proxies, but non of the popular ones support replication. There are also a small number of replicators, but these all seem to be mostly unmaintained/untested toy projects with little documentation.
## Usage
### Direct
```
./replicator --listen-port=9500 --forward=192.0.2.1 --forward=198.51.100.5:9100
time="2019-09-23T14:29:50+01:00" level=info msg="Server started" ip=0.0.0.0 port=9500
time="2019-09-23T14:29:50+01:00" level=info msg="Forwarding target configured" addr="192.0.2.1:9500" num=1 total=2
time="2019-09-23T14:29:50+01:00" level=info msg="Forwarding target configured" addr="198.51.100.5:9100" num=2 total=2
```
The above command will:
- Start a UDP server listening on `0.0.0.0` (the default) port `9500`
- Add a forward target of `192.0.2.1:9500` (uses `listen-port` for destination port as not specified in configuration)
- Add another forward target of `198.51.100.5:9100`
The server will start listening on `0.0.0.0:9500`, any packet it receives will be replicated and sent to both `192.0.2.1:9500` and `198.51.100.5:9100`
### Docker
```
docker run -e FORWARDS=$'192.0.2.1\n198.51.100.5:9100' thomseddon/udp-replicator:1
```
### Docker Compose
```
version: '3'
services:
udp-replicator:
run: thomseddon/udp-replicator:1
environment:
DEBUG: "true"
FORWARD: "192.0.2.1\n198.51.100.5:9100"
```
## Configuration
```
usage: replicator []
Flags:
--help Show context-sensitive help (also try --help-long and --help-man).
--debug Enable debug mode
--listen-ip=0.0.0.0 IP to listen in
--listen-port=9000 Port to listen on
--body-size=4096 Size of body to read
--forward=ip:port ... ip:port to forward traffic to (port defaults to listen-port)
```
All configuration params can be passed as arguments as shown above, or as environment varaibles (as shown in usage above) - where environment variables are uppercased snake case e.g. `LISTEN_IP`
## Copyright
2019 Thom Seddon
## License
[MIT](https://github.com/thomseddon/udp-replicator/blob/master/LICENSE.md)