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RDP problem to Centos 7

saeed.J
over 1 year ago

Hi there

one of my client couldn't connect through RDP to CentOS server after upgrading SPS to 6.11.1

and i got following logs:

Static virtual channel count mismatch; client_to_server='6', server_to_client='5'
Function failed; function='rdp_mangle_mcs_init_rsp'
Function failed; function='rdp_mangle_pdu_dt'
Function failed; function='rdp_mangle_iso3'

before upgrade it was ok.

how can i fix this issue ?

client OS : windows 8.1

server OS : Centos 7

  • 0 over 1 year ago

    Hi Saeed,

    Upgrading SPS can introduce changes that could make older method of the connection become incompatible for example, SHA1 certificates are no longer accepted with RDP in SPS 6.10 or higher and so that would require updating the system certificate to use SHA256. 

    SPS version 6.11.1 is no longer supported. The currently supported version for feature release of SPS is version 6.13.1, if the issue persists with the latest version, you may open a service request with support to troubleshoot the issue further.

    Thanks!

  • 0 over 1 year ago

    The error message you're getting suggests that there's a mismatch in the static virtual channel count between the client and the server.
    One possible solution is to modify the RDP settings on the Windows 8.1 client to match the configuration of the CentOS server. You can also try upgrading to the latest version of RDP and see if that resolves the issue.
    Additionally, I would recommend checking out tuxcare.com for their CentOS 7 End-of-Life support services. They may also be able to assist you with troubleshooting and resolving this issue.