OAM or OID SSL: Weblogic Console URL in Browser Gives Error code: ssl_error_weak_server

After SSL enable we seen the below issue in Chrome & Firefox Browsers.

Accessing Weblogic Console URL in Browser Gives Error code: ssl_error_weak_server 

Enterprise Manager (EM) 12c Cloud Control uses 10.3 weblogic server; accessing weblogic console URL (https://<OMS HOSTNAME>:7101/console) in browser gives the following error: 

In Chrome Browser: 
Server has a weak, ephemeral Diffie-Hellman public key 
ERR_SSL_WEAK_SERVER_EPHEMERAL_DH_KEY 

In Firefox Browser: 
SSL received a weak ephemeral Diffie-Hellman key in Server Key Exchange handshake message. 
(Error code: sl_error_weak_server_ephemeral_dh_key) 

This is on HP-UX, Will be applicable to other Unix Flavors.

Find and confirm what possible ciphers been supported with your platform & JDK Version.

Possibly like below, Add them to config.xml under "SSL" tag.

<ssl>
      <name>oam_server1</name>
      <enabled>true</enabled>

#################

       <ciphersuite>TLS_RSA_WITH_RC4_128_SHA</ciphersuite>
      <ciphersuite>TLS_RSA_WITH_RC4_128_MD5</ciphersuite>
      <ciphersuite>SSL_RSA_WITH_RC4_128_MD5</ciphersuite>
      <ciphersuite>SSL_RSA_WITH_RC4_128_SHA</ciphersuite>
      <ciphersuite>SSL_RSA_WITH_3DES_EDE_CBC_SHA</ciphersuite>
      <ciphersuite>SSL_RSA_WITH_DES_CBC_SHA</ciphersuite>
      <ciphersuite>TLS_RSA_WITH_AES_128_CBC_SHA</ciphersuite>

#################

And also check for enable or disable below parameters.

#################

     <hostname-verification-ignored>true</hostname-verification-ignored>

      <client-certificate-enforced>false</client-certificate-enforced>

#################

Once you are good with the parameters restart the Managed Server. And be sure that your certs loaded and Application url listening on desired Ports.

Good Luck!!

Srikanth