On Tue, Sep 1, 2015 at 7:00 PM, Stuart Henderson <stu at spacehopper.org> wrote: > On 2015/09/01 16:04, Younes Manton wrote: >> Hi, >> >> I've had this problem for at least a couple of years. Whenever I >> connect to a Windows machine via xfreerdp over my work place VPN the >> xfreerdp client inevitably hangs. Occassionally SSH sessions will also >> hang, but this happens much less often. I never see either problem >> when not connected over VPN. >> >> I normally run OpenConnect via Network Manager, but I recently ran it >> on the command line with -v to watch the output. As best as I can tell >> the hangs always follow a CSTP rekey and the only thing that's >> different from the usual is that these lines begin to appear: >> >> Send CSTP Keepalive >> Send CSTP DPD >> Got CSTP DPD response >> >> They seem to stop being emitted once I kill the unresponsive xfreerdp client. >> >> On the Windows side I see the following in the Event Viewer every time >> xfreerdp hangs: >> >> The Terminal Server security layer detected an error in the protocol >> stream and has disconnected the client. Client IP: <my IP>. >> >> Anything I can do to debug this? > > Try reducing the mtu requested (openconnect's -m flag). > Thanks. Seems like the server doesn't allow anything outside of 1280-1300, the values I pass to -m are clamped to that range. Neither helps my problem.
