Configure COM Port and LPT Port Redirection settings using the registry 编辑

July 23, 2022 Contributed by:  SC L

Configure COM Port and LPT Port Redirection settings using the registry

In VDA versions 7.0 through 7.8, COM Port and LPT Port settings are only configurable using the registry. For VDA versions earlier than 7.0 and for VDA versions 7.9 and later, these settings are configurable in Studio. For more information, see Port redirection policy settings
and Bandwidth policy settings
.

Policy settings for COM Port and LPT Port Redirection are located under HKLM\Software\Citrix\GroupPolicy\Defaults\Deprecated on the VDA image or machine.

To enable COM port and LPT port redirection, add new registry keys of type REG_DWORD, as follows:

Caution: Editing the registry incorrectly can cause serious problems that might require you to reinstall your operating system. Citrix cannot guarantee that problems resulting from the incorrect use of the Registry Editor can be solved. Use Registry Editor at your own risk. Be sure to back up the registry before you edit it.

Registry keyDescriptionPermitted values
AllowComPortRedirectionAllow or prohibit COM port redirection1 (Allow) or 0 (Prohibit)
LimitComBwBandwidth limit for COM port redirection channelNumeric value
LimitComBWPercentBandwidth limit for COM port redirection channel as a percentage of total session bandwidthNumeric value between 0 and 100
AutoConnectClientComPortsAutomatically connect COM ports from the user device1 (Allow) or 0 (Prohibit)
AllowLptPortRedirectionAllow or prohibit LPT port redirection1 (Allow) or 0 (Prohibit)
LimitLptBwBandwidth limit for LPT port redirection channelNumeric value
LimitLptBwPercentBandwidth limit for LPT port redirection channel as a percentage of total session bandwidthNumeric value between 0 and 100
AutoConnectClientLptPortsAutomatically connect LPT ports from the user device1 (Allow) or 0 (Prohibit)

After configuring these settings, change your machine catalogs to use the new master image or updated physical machine. Desktops are updated with the new settings that the next time users log off.

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