I tried to connect to Ubuntu Server from Windows 8 using PuTTY.
At first, it asked me some registration of key. I accepted the pop up request. After that whenever I access Ubuntu Server there will be no registration, because already registered.
What I want is I want that registered key from Windows 8 location and remove them, so that when try to connect PuTTY will ask me to register keys again.
I don't know where those SSH keys or certificates are stored in Windows 8. Please help me to find certificates and remove them. I tried my C:\ I couldn't find any SSH folder or certificates.
It's called SSH host key. It's not a certificate.
PuTTY stores them to Windows registry under a key:
[HKEY_CURRENT_USER\Software\SimonTatham\PuTTY\SshHostKeys]
See Verifying the host key chapter in PuTTY documentation to understand the purpose and importance of verifying the SSH host key.
Related
I just created my first VPS host on OVHcloud. When I ssh for the first time I see:
The authenticity of host 'X.X.X.X (X.X.X.X)' can't be established.
ECDSA key fingerprint is SHA256:<the-fingerprint>.
Are you sure you want to continue connecting (yes/no/[fingerprint])?
Is there a way to verify this fingerprint? I know that people most of the time ignore the possibility of a MITM here and skip the check. But most of the time the first connection happens within an internal network, which isn't the case here.
Alternatively I'd be happy to upload an ssh public key to the server using the web manager. But I haven't found a way to do that.
The answer is yes.
I just discovered you can connect to the KVM directly from the OVH manager, thus connecting through tty1.
Go to your OVH manager, and in your VPS page, there should be a part that says "Name". There is then an option in the dropdown menu, "KVM" which let's you locally connect to your VPS through a QEMU instance.
You can get your fingerprints after logging in in this manner.
The answer is no for both questions:
When OVH spawn your VPS, they don't check/gather the auto generated ECDSA key (the ones in /etc/ssh/ssh_hosts_ecdsa*). So for the first connection, there is no way to verify this fingerprint.
For the SSH key upload through the OVH Manager, this is sadly not possible neither. You have to upload it by yourself with ssh-copy-id root#vpsXXX.
Note that it's possible on OVH's Public Cloud Instances, but not for VPS
So I have been toying around with this for a week now and it is driving me bananas. I have the native Windows 10 SSH server and client installed on both machines. Most of the time when I try to connect I get "ssh: connect to host 10.0.0.8 port 22: Connection timed out" when I realized it might be my firewall I disabled it and tried again only to get "ssh: connect to host 10.0.0.8 port 22: Connection refused". The only time I have gotten closer is when using a Ubuntu VM, but then when I am prompted for a password none work, I assume that has to do with the rsa key that I have yet to establish.
How can I get either (Preferably Both) of these connections to work?
Can two Windows 10 PCs even SSH to each other?
Is there a solid tut out there that I should turn to?
I would be thankful for any help on this problem.
Thank you for your time
N/A
Yes, you can use the optional Windows 10 feature OpenSSH Server (sshd) and the corresponding ssh client to make connections between two Windows 10 PCs. You can actually use any ssh standard client to connect, i.e. ssh from Linux.
When you install the "OpenSSH SSH Server (sshd)" from the optional feature settings in Windows it will also automatically create a firewall rule in the Inbound Rules folder of the Windows Defender Firewall and activate the rule. This should make it possible to connect with any ssh client to your PC.
After the installation check the following:
The Windows Service called OpenSSH SSH Server is started and running, it is set to manual start as default so it will not be running unless you have started it.
The inbound firewall rule OpenSSH SSH Server (sshd) is enabled in Windows Defender Firewall with Advanced Security
If these are active you should be able to use ssh MACHINENAME from a shell, command prompt or terminal on another PC to connect to the PC running the SSH server.
When using a Microsoft Account the user name might display a shorter version of the username when you sign-in but the password would be the same as your Microsoft Account.
I just had a similar problem. In my case, I fixed it in the services settings on windows. Make sure that the startup options of the Open SSH Agent and Open SSH Server services are set to automatic and that you start the services. At best, do a reboot afterwards. Again check whether sshd and ssh-agent in the services tab in task manager are running. Then, it should work.
I have a machine that I want to setup an SFTP connection to. The SSH server is running properly, I can ssh into it from my client computer, and I can SFTP in from my smartphone. I'm just a bit confused on how to properly configure the ~/.netrc file. The server computer is running Ubuntu, the client computer is running OSX.
Here are my main requirements for what I'm trying to configure:
Alias. I don't have a DNS name for the computer I'm connecting to, just the IP address. ~/.ssh/config is great because it basically assigns aliases to connections, and then specifies the hostname, port, etc. Looking at the man page for ~/.netrc, I don't see a way to do this.
Private Key. This SFTP connection is validated using a private key. I don't see anything in the ~/.netrc man page about how to specify the key.
If ~/.netrc is the wrong way to go, what alternatives would be better?
I am trying to connect to Unix server from WinSCP commandline for the first time.
It closes with the the following error:
The server's host key was not found in the cache. You have no guarantee that the
server is the computer you think it is.
The server's rsa2 key fingerprint is:
ssh-rsa 1024 42:9e:c7:f4:7f:8b:50:10:6a:06:04:b1:d4:f2:04:6d
If you trust this host, press Yes. To connect without adding host key to the cac
he, press No. To abandon the connection press Cancel.
In the WinSCP commandline, it does not ask for any input (Yes or No). It closes with Authentication failed. If I connect through the WinSCP tool, I'll get the same error. However, I'll be able to press YES.
I also know that If I add -hostkey switch in the command line, I'll be able to connect. But, I don't want pass hostkey in my batch script as I will be connecting to various servers. So, my requirement is to pass "YES" input from the commandline in case of this error. Can someone help?
A host key fingerprint verification is a crucial step in securing your SSH connection. Even if you are using a set of sessions with your script, it does not excuse you. The fingerprint should be part of a set of information you have for each of the sessions (in addition to a hostname, an username and a password).
Skipping the fingerprint verification means that you lose any security and there's no point using an SSH/SFTP anymore.
Anyway, if you do not care about a security, you can use the -hostkey=* switch to unconditionally accept any host key.
Further references:
Where do I get SSH host key fingerprint to authorize the server?
Verifying the host key
I purchased shared hosting from Vexxhost.I wanted to host my Rails application with them.I was given cpanel details.I generated SSH keys using the cPanel and converted it to .ppk format.Next, i downloaded the key.But when i try SSH login using Putty, i get the message Server Refused Our Key.Then i'm prompted for the password.When i enter password, message is displayed: Shell access is not available for your account.Contact support.I did contact support, but no reply.Am I doing any mistake in the procedure?
I haven't used cpanel to generate ssh keys, usually I do it at the ubuntu console. Is it possible that the ppk conversion has encoding issues? or it not done right?
Do you have access to a linux box? It would be simpler to test it there.
I have configured a server myself with ssh access, and if user does not have ssh access they are presented with user/pass. So it appears that your ssh credentials are denied, but your password is recognized as accurate. Authentication is happening.
About the issue of shell support. It could be that they enable shell support only if you connect with valid ssh credentials - in which case, you need to contact support.
Or, your account does not have ssh access, and you still need to contact support.
hope it helps