Important note about SSL VPN compatibility for 20.0 MR1 with EoL SFOS versions and UTM9 OS. Learn more in the release notes.

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RDP freezes for 5-10 seconds

VTH

So we have a pretty new XGS 2300 and we have some cases where we connect to our customers servers over an Ipsec Site-to-Site tunnel with RDP.

the tunnel is stable but sometimes the remote desktop session freezes for a short time.

I looked into the firewall logs and saw that the server which I connected to tried to reply with src port 3389 to a random high port UDP. Is this normal because UDP sends packages without acknowledgement or could this be the root of the problem.

I also looked into the thread where I should disable the ipsec-acceleration but havent tried this yet.



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  • 0 in reply to Vivek Jagad

    So we are using:

    Sophos Firmware Version: SFOS 19.5.3 MR-3-Build652                              
    Model: XGS2300                                                                  
    Hostname: Firewall1                                                          
    HA node name: Firewall1                                                      
    Current status: Primary (Active) from 10:34:09 PM, Dec 20, 2023                 
                                                                              
    console> system ipsec-acceleration show                                         
    IPsec acceleration status: turned on   

    The links you posted are mentioning tcp but all remote desktop traffic is udp

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