Recieving Data from VPN

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  • #51505
    Kevin Crist

    We are trying to set up a connection to recieve data from an outside source through vpn. We are sending a few things out from vpn but never recieved, other than acks i guess. We are having problems recieving the message, the outside company says its sending the messages and can see them but we are not recieving them through our vpn. I know that is more of a tech side issue. I am sure many people have recieved data from a vpn, do you set up the thread as a “regular” inbound thread? We are using protocal:pdl-tcpip with PDL:mlp_tcp.pdl.   Set up as client with the hosts ip address and port. Which is our normal inbound thread setup. Is thier anything we should do different? We are kind of reaching and want to cover all basis.

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  • Author
    • #70537

      Yup. Set it up as a normal interface. The problems with VPN connections are usually related to the networking and firewalls.

      -- Max Drown (Infor)

    • #70538
      Michael Hertel


      Set up as client with the hosts ip address and port. Which is our normal inbound thread setup

      If this is a receiver, you should be set up as a server without host ip information.

    • #70539
      Steven Lindsey

      I work with Kevin and they sent me an email asking if our application can receive MLLP traffic? If so what setting would I need to change or set?

    • #70540
      Jim Kosloskey


      On the thread configuration, select the pdl-tcpip Protocol; then in that protocol’s properties select mlp_tcp as the pdl to use.

      Don’t forget to send and acknowledgment as it appears you are acting as the server.


    • #70541
      Steven Lindsey

      It looks like all my setting are right.  As anyone else ever use MediMoblie?  This is the company that I’m working with and having tons of issues.

    • #70542

      By the way, the Secure Courier program available from Healthvision is very helpful for working with applications outside of the network/firewall.

      -- Max Drown (Infor)

    • #70543
      Anand Raghavan

      BTW,  we ran into a problem with interfaces via VPN.  If there is little or no traffic for extended periods of time, the VPN used to time out and disconnect.

      We run Cloverleaf 5.6 under AIX 5.3

      There is a limits file called /etc/security/limits owned by “root”.  

      We had get our UNIX admin to adjust the tcp_keepidle parameter

      For example:

      the default value in the file was


      This parameter is measured in half seconds.

      We reduced it to 600 (5 minutes).   So, every five minutes the OS would send a keep alive packet to maintain a persistent connection

      Hope this helps out someone.


    • #70544
      Robert Milfajt

      This will help me, coming up.  This type of thing needs to hit a library of helpful information!

      Robert Milfajt
      Northwestern Medicine
      Chicago, IL

    • #70545
      Robert Gordon

      Your VPN router should have a port routing table, make sure that messages coming from the host ip/port are pointing to your cloverleaf server ip/port address.  Port number mismatches usually do not work and your communication on the VPN should be bi-directional.  Yup some lan guys think that sending data does not require an ack or (confirmation), and remember the recovery_33 tcl procs and the generic ack proc on this site.

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