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Can't login to RDP Session with WG SSL VPN

travis_tmbtravis_tmb
in Technical Discussion

A few months ago, when logging into my RDP Session connected to WG SSL VPN, the session won' take my password. It was working just fine and all of a sudden quit working. When I use WG SSL VPN it works fine. Any ideas?

Thanks!

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    Bruce_BriggsBruce_Briggs

    Could be an MTU issue. RDP seems sensitive to running inside a VPN session when the endpoints don't use a good PMTU (Path MTU) setting.

    Path MTU Discovery
    https://en.wikipedia.org/wiki/Path_MTU_Discovery

    You can use Alan's PMTU script to change Windows so that it automatically
    identifies the correct MTU to use for a session, and see if that helps.
    I have listed that script in this topic:

    IKEV2 sound
    https://community.watchguard.com/watchguard-community/discussion/comment/5280#Comment_5280

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    james.carsonjames.carson Moderator, WatchGuard Representative

    @travis_tmb Do you see allow logs on your firewall, or have any settings changed on the firewall related to the policy that you were using to access the RDP server?

    If nothing on the firewall has changed, and you can pass other traffic on the VPN, it's very likely the firewall isn't the issue. I'd suggest looking at any error/event logs on the RDP server to see what might be wrong.

    -James Carson
    WatchGuard Customer Support

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