# FluentD: cannot send logs to UDP port of GrayLog (only TCP)
**URL:** https://community.graylog.org/t/fluentd-cannot-send-logs-to-udp-port-of-graylog-only-tcp/18150
**Category:** Graylog Central (peer support)
**Created:** [December 10, 2020, 5:25pm UTC](https://community.graylog.org/t/fluentd-cannot-send-logs-to-udp-port-of-graylog-only-tcp/18150 "2020-12-10T17:25:36Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@dimedrol](https://community.graylog.org/u/dimedrol)
#### Post date: [December 10, 2020, 5:25pm UTC](https://community.graylog.org/t/fluentd-cannot-send-logs-to-udp-port-of-graylog-only-tcp/18150/1 "2020-12-10T17:25:36Z")
Sorry about possible offtopic (FluentD), but in case of anyone aware of…
I’ve got GrayLog instance up and running.
I can _forward_ my logs from FluentD remote host to GrayLog port.
I see the logs, everything is fine.
BUT!
I only can send logs to **TCP port**!
On FluentD side config is:
```auto
@type gelf
host graylog.example.com
port 12333
#protocol udp
flush_interval 3s
```
I trued with and without `protocol udp` setting. No luck.
It always sends logs **to TCP port**.
I even tried to send some UDP data **from remote host** to my GrayLog instance:
```auto
echo "ssssssssssss" | netcat -u graylog.example.com 12333
```
It works!
I see:
```auto
Throughput / Metrics
1 minute average rate: 0 msg/s
Network IO: 0B 0B (total: 16.0B 0B )
```
**16 bytes received!**
So, port is open and GrayLog is receiving data.
But, what’s with FluentD?
How to configure FluentD to use UDP port for log sending?
---
### Author:  [@dimedrol](https://community.graylog.org/u/dimedrol)
#### Post date: [December 18, 2020, 10:08am UTC](https://community.graylog.org/t/fluentd-cannot-send-logs-to-udp-port-of-graylog-only-tcp/18150/2 "2020-12-18T10:08:59Z")
Solved!
Just use “fluent-plugin- **gelf-hs** ” plugin for FluentD, instead of “fluent-plugin-_gelf_”
Here’s my working Dockerfile for building GELF-UDP-enabled FluentD:
> **[divlv/fluentd](https://github.com/divlv/fluentd)**
>
> FluentD logs collector with extra plugins. Contribute to divlv/fluentd development by creating an account on GitHub.
---
### Author:  [@system](https://community.graylog.org/u/system)
#### Post date: [January 1, 2021, 10:09am UTC](https://community.graylog.org/t/fluentd-cannot-send-logs-to-udp-port-of-graylog-only-tcp/18150/3 "2021-01-01T10:09:02Z")
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