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RDP thru SSL VPN successful after 3 retries (Internal error)

Klein BeerninkSupport

Hello,

We are using a RDS Servers 2012R2 cluster with 4 Session hosts in a farm.

Connecting internally with RDP to the farm is succesfull but externally with the Sophos SSL VPN it takes up to 3 times to connect successfully.

The users are receiving an "Internal Error" message.

Any help would be appreciated.

Kind regards,

Rob.



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  • Hi, Rob, and welcome to the UTM Community!

    On the UTM, assuming that 10.2.0.1 is the address through which the RDP sessions are reached:

    tcpdump -w \home\test.pcap -n -i eth0 src 10.2.0.1

    There's a built-in packet capture utility in the 2012r2 server, but I've not played with that - I just use Wireshark.

    Also, please show a picture of the error message so that we can understand the context.

    Cheers - Bob

     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
  • in reply to BAlfson

    It appears that when i do an "ipconfig /flushdns" before starting the RDP connection everything is fine.

    If i don't do that after setting up the Sophos VPN, it is almost impossible in some cases to connect to the RDS farm using RDP on a Windows 7, 8.1 or Windows 10 Workstation.

  • in reply to Klein BeerninkSupport

    Hi,

    Go to Remote Access> Advance, configure UTM as the DNS server for the remote clients.

    Does that help?

    Sachin Gurung
    Team Lead | Sophos Technical Support
    Knowledge Base  |  @SophosSupport  |  Video tutorials
    Remember to like a post.  If a post (on a question thread) solves your question use the 'This helped me' link.

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