Hi Christopher,

Below is my Connector element, sslEnabledProtocols =TLSv1.2 ,TLS 1.3 it is 
working fine with TLSv1.2.  When sslEnabledProtocols=TLSv1.3, Tomcat is started 
but, the browser unable to perform handshake with webapp.

Is there any dependency with Cipher suites?

<Connector protocol="com.ericsson.http.protocol.Http11Nio2ProtocolDecryptProp" 
port="<fourdigit number>" maxThreads="200" scheme="https" secure="true" 
SSLEnabled="true" keystoreFile="/opt/cert/keystore" 
keystorePass="<Keystore_Password>" clientAuth="false" maxHttpHeaderSize="8192" 
server="<SERVER>" xpoweredBy="false" 
ciphers="TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, 
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384, 
TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384, 
TLS_DHE_DSS_WITH_AES_256_CBC_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, 
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA, 
TLS_ECDH_RSA_WITH_AES_256_CBC_SHA, TLS_DHE_DSS_WITH_AES_256_CBC_SHA, 
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, 
TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256, 
TLS_DHE_DSS_WITH_AES_128_CBC_SHA256, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, 
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA, 
TLS_ECDH_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_DSS_WITH_AES_128_CBC_SHA, 
TLS_ECDHE_ECDSA_WITH_RC4_128_SHA, TLS_ECDH_ECDSA_WITH_RC4_128_SHA, 
TLS_ECDH_RSA_WITH_RC4_128_SHA, TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, 
TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, 
TLS_RSA_WITH_AES_256_GCM_SHA384, TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384, 
TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384, TLS_DHE_DSS_WITH_AES_256_GCM_SHA384, 
TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, TLS_RSA_WITH_AES_128_GCM_SHA256, 
TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256, 
TLS_DHE_DSS_WITH_AES_128_GCM_SHA256, TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA, 
TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA, 
TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA" sslEnabledProtocols=" TLSv1.3"/>



Regards,
Abirami.S

-----Original Message-----
From: Christopher Schultz <ch...@christopherschultz.net> 
Sent: Monday, June 28, 2021 7:27 PM
To: users@tomcat.apache.org
Subject: Re: TLSv1.3 Support in Tomcat

Abirami,

On 6/28/21 07:16, S Abirami wrote:
> TLSv1.3 support is available in Tomcat.
> 
> I tried just updating server.xml[sslEnabledProtocols=TLSv1.3] and 
> restarted tomcat. It doesn't work.
> 
> [We are using Tomcat 9.0.46 and JDK 8u291]
> 
> Please let me know any other configuration also needs to be changed.

Can you please post your <Connector> configuration (minus any secrets)?

When you say "it doesn't work", what exactly do you mean?

-chris

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