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---
title: Stream Proxy
---
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TCP is the protocol for many popular applications and services, such as LDAP, MySQL, and RTMP. UDP (User Datagram Protocol) is the protocol for many popular non-transactional applications, such as DNS, syslog, and RADIUS.
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APISIX can dynamic load balancing TCP/UDP proxy. In Nginx world, we call TCP/UDP proxy to stream proxy, we followed this statement.
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## How to enable stream proxy?
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Setting the `stream_proxy` option in `conf/config.yaml` , specify a list of addresses that require dynamic proxy.
By default, no any stream proxy is enabled.
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```yaml
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apisix:
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stream_proxy: # TCP/UDP proxy
tcp: # TCP proxy address list
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- 9100
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- "127.0.0.1:9101"
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udp: # UDP proxy address list
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- 9200
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- "127.0.0.1:9211"
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```
## How to set route?
Here is a mini example:
```shell
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curl http://127.0.0.1:9080/apisix/admin/stream_routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
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{
"remote_addr": "127.0.0.1",
"upstream": {
"nodes": {
"127.0.0.1:1995": 1
},
"type": "roundrobin"
}
}'
```
It means APISIX will proxy the request to `127.0.0.1:1995` which the client remote address is `127.0.0.1` .
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For more use cases, please take a look at [test case ](https://github.com/apache/apisix/blob/master/t/stream-node/sanity.t ).
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## More route match options
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And we can add more options to match a route.
Here is an example:
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```shell
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curl http://127.0.0.1:9080/apisix/admin/stream_routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
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{
"server_addr": "127.0.0.1",
"server_port": 2000,
"upstream": {
"nodes": {
"127.0.0.1:1995": 1
},
"type": "roundrobin"
}
}'
```
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It means APISIX will proxy the request to `127.0.0.1:1995` which the server address is `127.0.0.1` and the server port is equal `2000` .
Read [Admin API's Stream Route section ](./admin-api.md#stream-route ) for the complete options list.