Incoming UDP requests from the host system may be dropped when you run Host Integration Server 2010


When you run Microsoft Host Integration Server 2010 on a computer, incoming User Datagram Protocol (UDP) requests from the host system may be dropped.


This problem occurs because the installation of Host Integration Server 2010 adds a firewall rule to the local server firewall. This added rule creates a nonexistent dependency on the IP data link connection (IPDLC) service. This nonexistent dependency may block incoming requests over UDP ports 12000 - 12004.

To view the details of the added rule, at a command prompt, type the following command, and then press Enter:
netsh advfirewall firewall show rule IPDLC verbose
The details of the added rule resemble the following:
Rule Name:                            IPDLC ---------------------------------------------------------------------- Description:                          IP-DLC Link Service Enabled:                              Yes Direction:                            In Profiles:                             Domain,Private,Public Grouping:                             Host Integration Server LocalIP:                              Any RemoteIP:                             Any Protocol:                             UDP LocalPort:                            12000,12001,12002,12003,12004 RemotePort:                           Any Edge traversal:                       No Program:                              C:\Program Files\Host Integration Server\system\snalink.exe Service:                              IPDLC InterfaceTypes:                       Any Security:                             NotRequired Rule source:                          Local Setting Action:                               Allow Ok. 


Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that described in this article. Apply this hotfix only to systems that are experiencing the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft website: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.


There are no prerequisites for installing this hotfix.

Restart information

You do not have to restart the computer after you apply this hotfix.

Replacement information

This hotfix does not replace a previously released hotfix.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

For the x86-based version of Microsoft Host Integration Server 2010
File nameFile versionFile sizeDateTimePlatform
For the x64-based version of Microsoft Host Integration Server 2010
File nameFile versionFile sizeDateTimePlatform


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

More Information

After the update is applied, follow these steps to remove the existing IPDLC firewall rule and to add the updated IPDLC firewall rule:

  1. Click Start, click All Programs, click Microsoft Host Integration Server 2010, then click Configuration Tool.
  2. Click Unconfigure Features.
  3. Click Network Integration.
  4. Click OK.

    Note If Session Integrator is also configured, a dialog box is displayed that explains that the Session Integrator feature is also going to be unconfigured. Click Yes in this box to proceed.
  5. Click Next, and then click Finish. The Network Integration feature is unconfigured at this point.
  6. Click Network Integration, and then click Enable Network Integration.
  7. Click the "..." button next to the Windows Service account, type the password for the HIS service account, and then click OK.
  8. If the Session Integrator feature was unconfigured as described earlier, click Session Integrator, and then click Enable Session Integration Feature. Click the "..." button next to the Windows Service account, type the password for the HIS service account, and then click OK.
  9. Click Apply Configuration.
  10. Click Next to configure the features.
  11. Click Finish.
  12. Close the Configuration Tool.

Note These steps must be done even when you are applying a Host Integration Server 2010 Cumulative Update that includes this update. If the Host Integration Server 2010 server has the Network Integration feature configured, the only way to get the new IPDLC firewall rule is to unconfigure and configure the Network Integration feature.


Artikelnummer: 2446500 – Letzte Überarbeitung: 21.08.2012 – Revision: 1