1/11/2024 0 Comments Solar putty ssh tunnelYEQgtbJd/hyHtTHK9X/wiKeQr7LjHZcEg3osYh+MzZFscldQM/a/Z26AKh81EC9X Your public key will look like this: - BEGIN SSH2 PUBLIC KEY -ĪAAAB3NzaC1yc2EAAAABJQAAAgEA5Kp+G9z8eE0MpPZL9JZksstIa3L9JEND6ud1ġIiD6f1jw/7Lv7CvZcCdk/OVMT+DlTbryRoqfbNMLkjajqNTUGBAscTduUtPYuQt Then save the private key in one file, and the public key in another file. Once it's generated, your screen will look like this:ĭescribe the account in the "Key Comment" field. I'd use at least 4098 bits.Ĭlick the Generate button, move the mouse around, until the key pair is generated. Here is how you do this.ĭownload PuTTYgen, and execute it to generate a SSH2-RSA key. You should first use PuTTYgen to create a key pair, then install the private key in PuTTY, and copy the public key to the remote site. This is the PuTTY-only way to do it, only using software from the PuTTY site. Your X11 apps don't care about which tty they're running in – they only care about the $DISPLAY.īut if your $DISPLAY is set to the display address assigned to the original PuTTY session, all X11 access will of course go through that PuTTY session, completely independent of what terminal you're running the X11 apps from.Combining two different packages for a security solution can be dangerous. So for example, when you connect to the SSH server via OpenSSH, it automatically sets $DISPLAY to the X11 display address that'll go through that specific OpenSSH-based connection. Don't do that.Įach connection that enables "X11 forwarding" will allocate a new display address on the SSH server's side – for example, your initial PuTTY session might create display :10 while your second OpenSSH session might create :11, even though they both are forwarded to the same display on your local machine (and which is probably neither ":10" nor ":11" but :0). This sounds like you're manually copying $DISPLAY from one session to another, or using a tty multiplexer like tmux or Screen to access one session's tty from another (carrying over the $DISPLAY). When I terminate the PuTTY session I start getting Error: Can't open display: localhost:10.0 I can run X11 apps only as long as I have an active PuTTY session in parallel. A display address of localhost:0 goes over TCP, but a bare :0 does not – on Linux it would indicate a UNIX socket.)īecause of this, the X11 forwarding feature doesn't use SSH's "TCP tunnel" facility at all, it has a whole separate kind of tunnel specifically for X11. (Of course, there might not even be a TCP port – - X11 often uses other socket types besides TCP most X11 servers on Linux use UNIX sockets and never enable TCP at all, and this won't always be the same on the SSH client and server side either. The "X11 forwarding" feature makes the SSH client automatically look at your local $DISPLAY to figure out where the X11 server is (which is how normal X11 apps work as well), whereas the SSH server has to provide $DISPLAY to remote apps. The SSH client has to forward this authentication data to the SSH server, so that remote clients would be permitted to connect.Īlso, the port might not necessarily be 6000 – that's the port for display :0 specifically, but if the local display is e.g. The "X11 forwarding" option is not a "port forwarding" option – they're different both in client/server behavior and even at protocol level.įor example, X11 requires each client to supply authentication data – most commonly a static key ("magic cookie") that clients read from their ~/.Xauthority file. (The syntax for environment variables depends on your local shell.) The terminal that you're using (whether it's Windows Terminal or MinTTY or something else) isn't important at all.Īpparently X11 requires more than just forwarding the remote port 6000 to the PC in PowerShell: PS> $env:DISPLAY = "localhost:0" To do that, set the DISPLAY environment variable before making the SSH connection, e.g. it doesn't automatically try to guess "localhost:0"). You might have to manually tell Win32-OpenSSH about where your X11 display is (i.e. ( ForwardX11Trusted or -Y is actually the closest – it gives unrestricted access to the X11 server, whereas ForwardX11 or -X restricts the clients from accessing the clipboard or seeing your local windows.) ForwardX11 and ForwardX11Trusted (the -X and -Y options) are the OpenSSH equivalent to PuTTY's "Enable X11 forwarding".
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