Graylog - Strange characters in message

Graylog Central (peer support)
1

Hello, I’m seeing strange characters in the message field. I tried to change the input type but they are all coming out the same.

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Any suggestions on how to fix this or where to look.

Thanks

2

What type of client is 192.168.36.19?
What’s the (syslog) configuration of that client?
What’s the configuration of the Syslog input in Graylog?

3

192.168.36.19 is a Meraki Firewall. We are getting the same results from our Cisco ASA firewall too. Here is the info

We tried all 3 of these inputs and they all have the same results.

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Thanks

4

Here is the client side

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5

Port 2055/udp is usually used for NetFlow, which is a binary protocol.

You cannot use a Raw/Plaintext or Syslog (which is also basically plaintext) input for that.