Re: suddenly not connecting to remote machines

Whatever was causing the problem seems to be fixed now. I can connect 
normally again.

On 2019-05-29 3:02 a.m., Tony Su wrote:
> I haven't heard of the following affecting VNC yet, and partly because
> VNC is likely using openSSL and/or openSSH for your encrypted
> connection (I'm guessing and don't know exactly what you've set up)
>
> But you might find interesting that on many Desktops on some distros
> that receive most recent upstream packages that gnutls packages have
> wreaked havoc, and the solution has been to downgrade.
>
> I haven't heard that openSSL or openSSH have experienced similar
> problems yet, but it seems that some encryption changes may be coming
> and your distro(s) might have received such in an update.
>
>
> On Tue, May 28, 2019 at 8:21 AM Gary Dale <[email protected]> wrote:
>> I doubt it. Different clients and different servers all developing the
>> same problem at the same time? After thinking about it some more, I'm
>> thinking that the problem lies in the only common component - the ssh
>> tunnel and specifically the port forwarding. If that isn't working, it
>> would explain the symptoms exactly.
>>
>> I'm going to raise the issue on a Debian list.
>>
>>
>> On 2019-05-28 6:03 a.m., Pencoys wrote:
>>> vnc has a timeout timer for inactivity. depending on the vnc version you have,
>>> i.e. Realvnc Tightvnc etc. it will be called something different, but similar
>>> to activity timeout. somewhere in general settings - set it to zero IIRC
>>> This could be your problem. hth, Mike G8NXD
>>>
>>> On 28 May 2019 at 5:28, Gary Dale wrote:
>>>
>>>> I'm running Debian/Testing on an AMD64 machine.
>>>>
>>>> I follow what I believe is a fairly conventional way of connecting to
>>>> remote machines. Firstly I establish an SSH tunnel using a command like:
>>>>
>>>>      ssh <remote server public IP> -L 5902:<remote workstation local
>>>> IP>:5900
>>>>
>>>> where the remote server public IP is that of the router (DD-WRT) with
>>>> port 22 forwarded to the local IP of a remote Debian/Stable server. The
>>>> remote workstation IPs are in the 192.168.1.* range. The SSH connection
>>>> works fine.
>>>>
>>>> Then I connect to localhost:5902 using a VNC viewer (tried a few).  I've
>>>> been doing this for a decade with no significant problems.
>>>>
>>>> However I haven't been able to do this since at least yesterday
>>>> (previous remote login was a week ago. It worked). No matter which
>>>> remote machine I try to connect to, I never get to the password prompt.
>>>> Instead the connection attempt eventually attempt times out.
>>>>
>>>> I can log onto a KVM virtual machine running on the remote server using
>>>> the Virtual Machine Manager GUI. From there I can connect to the other
>>>> (real) machines using the Tight VNC viewer.
>>>>
>>>> I'm stumped. The KVM service is clearly working on the remote
>>>> workstations since I can connect to them from the virtual machine. Any
>>>> ideas?
>>>>
>>>>
>>>>
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>>>
>>
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