Using html5 client via ssh

[thorstenwagner]

Hi,

I found this interesting article:
https://github.com/Xpra-org/xpra/blob/master/docs/Network/SSH.md

Do you have suggestions how access the html5 client? I used ssh port forwarding, but it is quite slow.

Best,
Thorsten

[totaam]

I have no idea how you would configure the xpra-html5 client to connect via SSH.
Doesn't make much sense to me.

[thorstenwagner]

I was just wondering, because I don't want the users install xpra locally. So if they could start xpra on lets say a HPC system, and then simply do ssh port forwarding and work with it in their browsers, would be very nice.

Do you maybe know a solution to that? Or how to improve the performance when I used port forwarding?

[totaam]

Why not just let them connect directly to an https enabled server, that's much easier to deploy.

[thorstenwagner]

I would assume that ssl port might not be open on the HPC system?

[totaam]

I would assume that ssl port might not be open on the HPC system?

And the SSH port is?

Port forwarding will add latency which makes xpra very slow: this problem is known as "TCP over TCP".
Don't do it.

[thorstenwagner]

Well, you connect to the HPC systems by ssh, so yes. Do both mostly Often additionally secured via 2-factor-auth etc

for example, for our super computer this works:
ssh -T -p 22 username@my.super.computer.de

but this isnt working:
ssh -T -p 443 username@my.super.computer.de

[totaam]

but this isnt working:

Why would it?
You can't ssh to an https port unless you put an ssh server on there.

[thorstenwagner]

Ok, I will look into it. However, I just tried port forwarding with -C and its working very well (without its terrible) !

This is how I connect

ssh -C -N -L 8082:localhost:22293 twagner@visualization.node.de

The only thing I noticed is a constantly see a context menu with "paste" popping up when I click somewhere. Shall I open a new issue for that?

[totaam]

The only thing I noticed is a constantly see a context menu with "paste" popping up when I click somewhere

I think we already have one for that: this is caused by Safari (right?) and there is a workaround in newer versions of the html5 client.

[thorstenwagner]

Its firefox. Should I just try the current html5 master?

[totaam]

Is it on MacOS?
I forgot, this is NOT fixed: Xpra-org/xpra-html5#226 (comment)

[thorstenwagner]

Its linux (manjaro)

[thorstenwagner]

I also started the server with --clipboard=No, but that did not help.

[totaam]

No, you need to turn off the clipboard in the html5 client.

[thorstenwagner]

Can you tell me how?

[totaam]

From the connect dialog, there is an option.

[thorstenwagner]

Cool! That works :-) Is there a way on the server side to deactivate the clipboard by default?

[totaam]

You can configure the client via:

• the URL by adding ?clipboard=no to it
• default-settings.txt in /usr/share/xpra/www/default-settings.txt (also usually symlinked to /etc/xpra)

[thorstenwagner]

Nice! Thanks :-)