Secure Shell (SSH) is a cryptographic network protocol for operating network services securely over an unsecured network. At the School of Computer Science, we use ssh for remote connection logins to our computers.<\/p>\n
Logging in to Linux using ssh<\/a> There are two ways to login to a remote Linux server using SSH:<\/p>\n IMPORTANT<\/span>: Carleton is behind a firewall. If you are outside of Carleton, you will need to VPN to Carleton first before you can access the SCS server resources. Refer to the Remote Access (VPN)<\/a> information.<\/p>\n If your computer is running Windows, you can use the free putty<\/a> utility as your ssh client.<\/p>\n At SCS, we use the x2go<\/a> client to connect to a Linux host graphically (using X11).<\/p>\n We encourage the use of ssh-key logins as it is both a convenient and safe way to ssh to your destination host without needing a password. Tuesday, November 12, 2024<\/p> In PuTTY 0.68 through 0.80 before 0.81, biased ECDSA nonce generation allows an attacker to recover a user's NIST P-521 secret key via a quick attack in approximately 60 signatures. This is especially important in a scenario where an adversary is able to read messages signed by PuTTY or Pageant. Besides impacting PuTTY, it... More<\/span><\/p><\/a><\/div> Tuesday, November 12, 2024<\/p> vscode: Remote Access and Code Editing Step 1: Install vscode Step 2: Install Remote-SSH Extension Step 3: Create Remote-SSH Connection Step 4: Open Folder on Remote Server Step 5: Open a terminal, edit some code, run some code! Troubleshooting: Failed Login Troubleshooting: Disk Full In addition to these instructions, you can find a video... More<\/span><\/p><\/a><\/div> Tuesday, November 12, 2024<\/p> When ssh'ing to access.scs.carleton.ca you may receive the error: Received disconnect: Too many authentication failures Disconnected There are at least two reasons for this message. If you provide a wrong password multiple times within a short period of time, it may be locked out - you will have to wait and then try again.This... More<\/span><\/p><\/a><\/div> Tuesday, November 12, 2024<\/p> Some ssh clients may complain with: "Unable to negotiate with 134.117.xxx.xxx port 22: no matching key exchange method found." The connect as follows: ssh -oKexAlgorithms=+diffie-hellman-group1-sha1 access.scs.carleton.ca Replace access.scs.carleton.ca with your destination... More<\/span><\/p><\/a><\/div> Tuesday, November 12, 2024<\/p> Annually the SCS Linux Network hosts are upgraded, and the ssh-keys will no longer match. If you know that the server has been upgraded and your ssh-keys no longer match, then it will be safe to accept the new ssh key. Your system administrator will be able to confirm if this is due to... More<\/span><\/p><\/a><\/div> Tuesday, November 12, 2024<\/p> SSH Connection with x2go Remote Desktop Client DEPRECATED - x2go is not used on newer images created since the Fall of 2024 - Instead use TurboVNC with our newer images Download x2go: here You can find a video demo of these instructions here: Connect to Remote Desktop via x2go (Video) Use the following settings... More<\/span><\/p><\/a><\/div> Tuesday, November 12, 2024<\/p> SSH Connection Using the putty SSH Terminal Client NOTE: This example uses putty, but the settings are the same for any tool using ssh, scp, etc. Download Putty: here You can find a video demo of these instructions here: Connect Remotely via a putty terminal (video) Enter settings into putty: Enter username \/... More<\/span><\/p><\/a><\/div> Tuesday, November 12, 2024<\/p> What is an SSH Key Pair? Why use Key Pairs? Comparing Password vs Key Pair Authentication Creating Key Pairs Authenticating and Connecting with Key Pairs Advanced Topic: Configuring SSH SSH allows you to securely connect to remote computers and virtual machines. With SSH, you can use a computer remotely through the terminal, transfer files... More<\/span><\/p><\/a><\/div> Tuesday, November 12, 2024<\/p> NOTE: This example uses putty, but the settings are the same for any tool using SSH, SCP, etc. Download Putty: here Use the following settings to make a terminal connection - Some of your settings will be different host: 134.117.216.10 - Replace this with your own instance's floating IP address username: student - default... More<\/span><\/p><\/a><\/div>
\nssh-key logins<\/a>
\nCommon ssh questions<\/a><\/p>\n<\/a>Logging in to Linux using SSH<\/h2>\n
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\nNot all servers support X11-sessions<\/strong>. Check the servers’ capabilities for remote desktop connections.<\/em><\/li>\n<\/ol>\nLogin using ssh to Linux using the terminal<\/h3>\n
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Login using ssh to Linux using the graphical method<\/h3>\n
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<\/a>ssh-key logins<\/h2>\n
\nSee the Passwordless SSH With Key Pairs<\/a> article for detailed instructions.<\/p>\n<\/a>Common ssh questions<\/h2>\n
PuTTY SSH Client Found Vulnerable to Key Recovery Attack<\/h3>
vscode: Remote Access and Code Editing<\/h3>
ssh error: too many authentication requests<\/h3>
Unable to negotiate: no matching key exchange method found.<\/h3>
SSH Key Exchange Errors<\/h3>
SSH Connection with x2go Remote Desktop Client<\/h3>
SSH Connection Using the putty SSH Terminal Client<\/h3>
Passwordless SSH With Key Pairs<\/h3>
Connecting to OpenStack Instances (SSH With PuTTY)<\/h3>