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Former Member

Error message'Hostname unknown'


I am trying to use use latest version of SAP GUI 720 with Windows 7 .

When I am connecting through Local Area Connection I am able to connet to the sap servers.

But when I am trying to connect through Internet via VPN it displays error

"""""hostname 'xxxx' unknown

Check your application server name

Do you want to see the detailed error desciption?

Yes/No """""

With same router string I am able to connect to SAP server through internet on Windows XP pro.

Not sure what is the issue

Kindly help.

With Best Regards,

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2 Answers

  • author's profile photo Former Member
    Former Member
    Posted on Sep 04, 2011 at 04:48 AM


    In Application server field, you can put Host Name instead of Server IP Address.

    But through VPN client you should enter IP address.

    Try that,



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    • Hi Thomas


      > it is getting a bit confusing.


      > Client Name : X ltd.

      > Client App server : .....


      > My laptop ip address: ....

      > my laptop hostname :.....


      > Now crucial question :

      > 2 Situations

      > via LAN Network connection

      > I should put in SAPGUI under appluication server : is working fine.No issues there


      > but while connecting via private internet /VPN (say at home or remote location )


      > I should change SAPGUI Application server : put my laptop ip address ? or client's server? as indicated earlier if I keep

      > then the connection doesn't work.

      First, if you have a basis team; contact them as otherwise, you might need to publish some confidential information online for deeper analysis.

      Assuming you can't reach them, go through the below..

      Connect using LAN. go to command prompt (start > run > cmd) and run


      (record this IP --> IPA)

      Go to your command prompt (start --> run --> cmd) and run > ipconfig

      Note the IP Address... (eg: 10.716.65.254 --> IPB)

      Then connect your VPN and go to the command prompt (start --> run --> cmd) and run

      > ipconfig

      Here, you should be able to see two IP addresses, one which connects you to the internet (seen before) and second that is allocated by VPN...

      Do any numbers of VPN ip and server IP match (IPA)?


      If they do match in atleast first / second octets.. then try connecting via sapgui where you need to replace Client App server : with the ip address,IPA. eg( If you still cant connect, you'll need to provide the sap gui trace file.


      If not, you'll need to contact your network team and ask them for the reverse proxy that allows you to access the private ip address of the servers.


  • author's profile photo Former Member
    Former Member
    Posted on Sep 05, 2011 at 07:50 AM

    Forget about your laptop (Just to clarify), Enter below details to configure a SAP logon pad entry.

    Description: Functionality of SAP System (Ex: Production)

    Application server: IP address of SAP server (Ask your tech team/helpdesk) for this

    System ID/SID: 3 character SAP System ID (Ex: PRO)

    System number: 2 digit SAP instance number (Ex: 00)

    If you have any helpdesk service, just contact them to add the logon pad entries.


    Nick Loy

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