If you enable the jetty startup dump you'll see the list of enabled cipher suites and protocols that Jetty is running with (including the reason why a specific available protocol or cipher suite is disabled).
| += SslConnectionFactory@51c668e3{SSL->http/1.1} - STARTED
| | += SslContextFactory@19f040ba[provider=null,keyStore=file:///mnt/c/code/jetty/distros/jetty-distribution-9.4.8.v20171121/demo-base/etc/keystore,trustStore=file:///mnt/c/code/jetty/distros/jetty-distribution-9.4.8.v20171121/demo-base/etc/keystore] trustAll=false
| | +- Protocol Selections
| | | +- Enabled (size=3)
| | | | +- TLSv1
| | | | +- TLSv1.1
| | | | +- TLSv1.2
| | | +- Disabled (size=2)
| | | +- SSLv2Hello - ConfigExcluded:'SSLv2Hello'
| | | +- SSLv3 - JreDisabled:java.security, ConfigExcluded:'SSLv3'
| | +- Cipher Suite Selections
| | +- Enabled (size=29)
| | | +- TLS_DHE_DSS_WITH_AES_128_CBC_SHA256
| | | +- TLS_DHE_DSS_WITH_AES_128_GCM_SHA256
| | | +- TLS_DHE_DSS_WITH_AES_256_CBC_SHA256
| | | +- TLS_DHE_DSS_WITH_AES_256_GCM_SHA384
| | | +- TLS_DHE_RSA_WITH_AES_128_CBC_SHA256
| | | +- TLS_DHE_RSA_WITH_AES_128_GCM_SHA256
| | | +- TLS_DHE_RSA_WITH_AES_256_CBC_SHA256
| | | +- TLS_DHE_RSA_WITH_AES_256_GCM_SHA384
| | | +- TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
| | | +- TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
| | | +- TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384
| | | +- TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
| | | +- TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
| | | +- TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
| | | +- TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
| | | +- TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
| | | +- TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256
| | | +- TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256
| | | +- TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384
| | | +- TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384
| | | +- TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256
| | | +- TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256
| | | +- TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384
| | | +- TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384
| | | +- TLS_EMPTY_RENEGOTIATION_INFO_SCSV
| | | +- TLS_RSA_WITH_AES_128_CBC_SHA256
| | | +- TLS_RSA_WITH_AES_128_GCM_SHA256
| | | +- TLS_RSA_WITH_AES_256_CBC_SHA256
| | | +- TLS_RSA_WITH_AES_256_GCM_SHA384
| | +- Disabled (size=53)
| | +- SSL_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA - JreDisabled:java.security, ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- SSL_DHE_DSS_WITH_3DES_EDE_CBC_SHA - ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- SSL_DHE_DSS_WITH_DES_CBC_SHA - JreDisabled:java.security, ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- SSL_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA - JreDisabled:java.security, ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- SSL_DHE_RSA_WITH_3DES_EDE_CBC_SHA - ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- SSL_DHE_RSA_WITH_DES_CBC_SHA - JreDisabled:java.security, ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- SSL_DH_anon_EXPORT_WITH_DES40_CBC_SHA - JreDisabled:java.security, ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- SSL_DH_anon_WITH_3DES_EDE_CBC_SHA - JreDisabled:java.security, ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- SSL_DH_anon_WITH_DES_CBC_SHA - JreDisabled:java.security, ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- SSL_RSA_EXPORT_WITH_DES40_CBC_SHA - JreDisabled:java.security, ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- SSL_RSA_WITH_3DES_EDE_CBC_SHA - ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- SSL_RSA_WITH_DES_CBC_SHA - JreDisabled:java.security, ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- SSL_RSA_WITH_NULL_MD5 - JreDisabled:java.security, ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- SSL_RSA_WITH_NULL_SHA - JreDisabled:java.security, ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_DHE_DSS_WITH_AES_128_CBC_SHA - ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_DHE_DSS_WITH_AES_256_CBC_SHA - ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_DHE_RSA_WITH_AES_128_CBC_SHA - ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_DHE_RSA_WITH_AES_256_CBC_SHA - ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_DH_anon_WITH_AES_128_CBC_SHA - JreDisabled:java.security, ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_DH_anon_WITH_AES_128_CBC_SHA256 - JreDisabled:java.security
| | +- TLS_DH_anon_WITH_AES_128_GCM_SHA256 - JreDisabled:java.security
| | +- TLS_DH_anon_WITH_AES_256_CBC_SHA - JreDisabled:java.security, ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_DH_anon_WITH_AES_256_CBC_SHA256 - JreDisabled:java.security
| | +- TLS_DH_anon_WITH_AES_256_GCM_SHA384 - JreDisabled:java.security
| | +- TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA - ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA - ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA - ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_ECDHE_ECDSA_WITH_NULL_SHA - JreDisabled:java.security, ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA - ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA - ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA - ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_ECDHE_RSA_WITH_NULL_SHA - JreDisabled:java.security, ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA - ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA - ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA - ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_ECDH_ECDSA_WITH_NULL_SHA - JreDisabled:java.security, ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA - ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_ECDH_RSA_WITH_AES_128_CBC_SHA - ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_ECDH_RSA_WITH_AES_256_CBC_SHA - ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_ECDH_RSA_WITH_NULL_SHA - JreDisabled:java.security, ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA - JreDisabled:java.security, ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_ECDH_anon_WITH_AES_128_CBC_SHA - JreDisabled:java.security, ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_ECDH_anon_WITH_AES_256_CBC_SHA - JreDisabled:java.security, ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_ECDH_anon_WITH_NULL_SHA - JreDisabled:java.security, ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_KRB5_EXPORT_WITH_DES_CBC_40_MD5 - JreDisabled:java.security, ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_KRB5_EXPORT_WITH_DES_CBC_40_SHA - JreDisabled:java.security, ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_KRB5_WITH_3DES_EDE_CBC_MD5 - JreDisabled:java.security, ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_KRB5_WITH_3DES_EDE_CBC_SHA - JreDisabled:java.security, ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_KRB5_WITH_DES_CBC_MD5 - JreDisabled:java.security, ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_KRB5_WITH_DES_CBC_SHA - JreDisabled:java.security, ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_RSA_WITH_AES_128_CBC_SHA - ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_RSA_WITH_AES_256_CBC_SHA - ConfigExcluded:'^.*_(MD5|SHA|SHA1)$'
| | +- TLS_RSA_WITH_NULL_SHA256 - JreDisabled:java.security