# TLSV1\_ALERT\_UNKNOWN\_CA
**URL:** https://discuss.elastic.co/t/tlsv1-alert-unknown-ca/204896
**Category:** Logstash
**Created:** [October 23, 2019, 3:03pm UTC](https://discuss.elastic.co/t/tlsv1-alert-unknown-ca/204896 "2019-10-23T15:03:13Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@mgutier](https://discuss.elastic.co/u/mgutier)
#### Post date: [October 23, 2019, 3:03pm UTC](https://discuss.elastic.co/t/tlsv1-alert-unknown-ca/204896/1 "2019-10-23T15:03:13Z")
Received the following error in Logstash 6.8.3 -- trying to use TCP Input with SSL.
[2019-10-22T22:30:21,891][ERROR][logstash.inputs.tcp] Error in Netty pipeline: io.netty.handler.codec.DecoderException: javax.net.ssl.SSLHandshakeException: error:10000418:SSL routines:OPENSSL\_internal:TLSV1\_ALERT\_UNKNOWN\_CA
Here is my config:
input {
tcp {
port =\> 1514
type =\> syslog
ssl\_enable =\> true
ssl\_cert =\> "/etc/logstash/ssl/cert.pem"
ssl\_key =\> "/etc/logstash/ssl/privkey.pem"
ssl\_certificate\_authorities =\> ["/etc/logstash/ssl/ca.pem"]
Not sure what is wrong in the config, I get the error in the log when I try to make a connection from a client.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [November 20, 2019, 3:03pm UTC](https://discuss.elastic.co/t/tlsv1-alert-unknown-ca/204896/2 "2019-11-20T15:03:17Z")
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