- #How to access open ssh on mac how to#
- #How to access open ssh on mac install#
- #How to access open ssh on mac password#
- #How to access open ssh on mac mac#
You can pre-cache all your SSH keys with the ssh-agent by running: ssh-add If you only sleep your mac, never restart it, you can go long periods of time without needing to enter your password.
#How to access open ssh on mac password#
This agent will cache the keypair the first time you use it so you only have to enter your password once in a while. To make it easier to use the key without having to enter the password every time, OS X runs an ssh-agent process in the background on your machine.
#How to access open ssh on mac mac#
Use disk encryption on your Mac and keep the permissions on the file and the ~/.ssh/ directory tight. Password protecting the key file ensure they'd need to know the password for that key to use it. Please note, anyone who gets a hold of your ~/.ssh/id_rsa file can ssh to this machine as root without supplying a password for the remote machine. Repeat the above for every machine you want to ssh in to with your keys instead of a password.
#How to access open ssh on mac how to#
Read on for how to make this something you don't need to enter all the time. Assuming the remote server's sshd is setup to do public-private key authentication, when you ssh to the box now it shouldn't ask you for a password for the root account - instead it'll ask you for the password for your key. You'll have to enter the password for to perform this copy, but this should be the last time you need to do this.
#How to access open ssh on mac install#
Now, assuming your ssh key exists on your Mac as ~/.ssh/id_rsa.pub, you can install it on a remote machine by running: cat ~/.ssh/id_rsa.pub | ssh "mkdir -p ~/.ssh & cat > ~/.ssh/authorized_keys"įor your specific server example cited above, the command would look like: cat ~/.ssh/id_rsa.pub | ssh -p 2200 "mkdir -p ~/.ssh & cat > ~/.ssh/authorized_keys" If you already have keypair you can skip the step above. When it asks if you want to protect the key with a passphrase say YES! It's bad practice to not password-protect your keys and I'll show you how to only have to enter the password once in a while. As long as they have public key authentication enabled, and your public key is present on the remote machine, you can ssh to the machines without having to supply a password.įirst you'll need to generate a public/private keypair like so: ssh-keygen -t rsaįollow the prompts. To remove a public key which you may previously have generated on your Mac, open Terminal once again and type rm ~/.You can copy your public key to the remote machines. The Public Key Support section of the External Login page explains why using ssh public keys is a bad idea. If that doesn't help, ask Informatics Computing Support for help. If this happens to you, just wait a while then try again. If you type it wrong several times you will be temporarily locked out. If you type the wrong password your login will fail. If you aren't using it, you will be prompted for your DICE password at this point. Ssh you are using Kerberos and GSSAPI, you will now be logged in to an Informatics ssh server. Replace servername with the name of the server to connect to.įor example, if your username was s1234567 and you wanted to connect to the Informatics ssh server for students, you would type this in the Terminal window: Replace username with your DICE username - for example s1234567. replacing username and servername with the correct values. Once you have a Terminal window running, this is how to use ssh: ssh servername You can find this in the Utilities folder which is on the Finder's Go menu. To use ssh first start the Terminal application. Once you have configured ssh as shown on that page, you will be able to ssh to School servers without being prompted for your DICE username and password each time you connect. (But note that the GSSAPIRenewalForcesRekey option is not supported.) Those instructions are for Linux, but ssh on the Mac should be configured similarly. To use this you will need to set up Kerberos on your Mac.Īfter that, read the instructions for Using GSSAPI (Kerberos) authentication. The most secure way to authenticate with the Informatics SSH service is to use GSSAPI (Kerberos).
This stage is optional, but we recommend it, because it will help to keep your DICE password safe. VPNīefore you can use ssh, you must be using a VPN - either the University VPN or the School's OpenVPN. (That page is for Linux, but ssh is the same on macOS and Linux.)įor background reading see connecting from outside the University - an overview.
When using ssh it's important to know how to use it securely, so please read about Host Key Management. You can use this to login safely and securely to the School of Informatics from elsewhere on the internet.