VNX: Error Message “The specified system is not reachable or the certificate on the system could not be validated" (USER Correctable)


   Article Number:     493894                                   Article Version: 2     Article Type:    Break Fix 




VNX1 Series,VNX/VNXe Family,VNX2 Series





Customer was trying to launch the GUI from the "Unisphere Client" for one of the VNX    
    In Unisphere Client Connect screen, when we type IP address for the host name and click Connect.   
    Customer encountered the below ERROR message:   
    “The specified system is not reachable or the certificate on the system could not be validated"     
    He was able to open GUI for another VNX Array from the same System but not for VNX 5300   
     Able to ping the Management IP addresses from the PC where Client was running   
    Action plan already followed:   
    1)Tried Restarting the Management server.   
    2) Generated Self signed Certificate.   
    But still getting the same error message    






Found that both the Arrays were on different subnet    
    Tried to telnet the ports 80 and 443    
    Port 80 and 443 was closed for VNX 5300 subnet.   






 Asked customer to open port 80 and 443 .   
    It was a network issue






You can check if a port is open in your network by issuing the telnet command. If it is open, you will see a blank screen after issuing the command:   
    telnet [domainname or ip] [port]   
    [domainname or ip] is the domain name or IP address of the server to which you are trying to connect   
    [port] is the port number where the server is listening   
    If the port is open, you will see a blank screen. This will mean that connection is successful.   
    For example   
    telnet SPA/SPB_IP 443   
    telnet SPA/SPB_IP 80   
    NOTE àIn Windows Vista and Windows 7 you may need to enable telnet first:   
    Go to Start -> Control Panel -> Programs;   
    Under Programs and features, click Turn Windows features on or off;   
    Mark both Telnet Client and Telnet Server;   
    Click OK.