# Disabling some SSL ciphers (optional)

SSL ciphers are encryption algorithms that are used to establish a secure communication. Some cipher suites offer a lower level of security than others, and you may want to disable these ciphers.

## Procedure

1. Go to the directory <root>/conf/ and open the TalendJobServer.properties file.
2. Add to the following parameter the list of ciphers that you want to disable:

   org.talend.remote.jobserver.server.TalendJobServer.DISABLED\_CIPHER\_SUITES

   Here is the list of the ciphers supported by Talend JobServer:
   ```
   TLS_KRB5_WITH_3DES_EDE_CBC_MD5
   TLS_KRB5_WITH_RC4_128_SHA
   SSL_DH_anon_WITH_DES_CBC_SHA
   TLS_DH_anon_WITH_AES_128_CBC_SHA
   TLS_DHE_RSA_WITH_AES_128_CBC_SHA
   SSL_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA
   SSL_RSA_EXPORT_WITH_RC4_40_MD5
   SSL_DHE_RSA_WITH_3DES_EDE_CBC_SHA
   TLS_KRB5_WITH_3DES_EDE_CBC_SHA
   SSL_RSA_WITH_RC4_128_SHA
   TLS_KRB5_WITH_DES_CBC_MD5
   TLS_KRB5_EXPORT_WITH_RC4_40_MD5
   TLS_KRB5_EXPORT_WITH_DES_CBC_40_MD5
   SSL_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA
   TLS_KRB5_EXPORT_WITH_RC4_40_SHA
   SSL_DH_anon_EXPORT_WITH_RC4_40_MD5
   SSL_DHE_DSS_WITH_DES_CBC_SHA
   TLS_KRB5_WITH_DES_CBC_SHA
   SSL_RSA_WITH_NULL_MD5
   SSL_DH_anon_WITH_3DES_EDE_CBC_SHA
   TLS_RSA_WITH_AES_128_CBC_SHA
   SSL_DHE_RSA_WITH_DES_CBC_SHA
   TLS_KRB5_EXPORT_WITH_DES_CBC_40_SHA
   SSL_DH_anon_EXPORT_WITH_DES40_CBC_SHA
   SSL_RSA_WITH_NULL_SHA
   TLS_KRB5_WITH_RC4_128_MD5
   SSL_RSA_WITH_DES_CBC_SHA
   TLS_EMPTY_RENEGOTIATION_INFO_SCSV
   SSL_RSA_EXPORT_WITH_DES40_CBC_SHA
   SSL_DH_anon_WITH_RC4_128_MD5
   SSL_RSA_WITH_RC4_128_MD5
   TLS_DHE_DSS_WITH_AES_128_CBC_SHA
   SSL_DHE_DSS_WITH_3DES_EDE_CBC_SHA
   SSL_RSA_WITH_3DES_EDE_CBC_SHA
   ```