![]() ![]() In this case that might use your SSH_AUTH_SOCK variable and specify a key they can access in the /tmp/ssh-whatevers/agent.1234 file as the key on THEIR session, thus impersonating you and therefore, by definition, be nefarious! Passwordless ssh Keys I would not suggest “no password” for your keys, but if you store the key in plain text and script around it anyway, you aren’t doing much good. File Permissions on agent.pid file Someone that uses the word nefarious, might be nefarious too. Agent Forwarding If your client allows agent forwarding (~/.ssh/config “Host *, ForwardAgent no”, then disable it, or do not forward through hosts you don’t trust. Once we close the shell, the key is no longer stored. In our example above, we are only storing the key for as long as the shell is open. Use the -t option to limit any session to a finite number of seconds if using ssh-add manually. Some other tips and insights on ssh-agent security Length of key storage Storing your keys indefinitely is not a great idea. ssh / ssh_auth_sock -> / tmp / ssh - yNwGYYhXFeEG / agent. Lrwxrwxrwx 1 david None 31 Oct 13 15 : 19 / home / david /. You can surely do this too, manually, each time you open a new session: #CYGWIN SSH SHELL PASSWORD#You may want to simply add the password manually to your keyring. ssh-agent/ssh-add was designed to help you with this. Regardless, you are typing WAY TOO MANY passwords. Or maybe you have to jump/chain ssh tunnels. Each time you have to type in a long and complicated password. You connect from your workstation to 10 different servers throughout the day, or to 1 server 10 times. Ssh-agent stores the private keys, but ssh-add adds or removes keys from the keyring. Instead you only have to type your password once per session, or shorter depending on how you configure ssh-agent. It basically prevents you from typing your password repeatedly. Ssh-agent is a program to hold private keys (like those you created with ssh-keygen), used for public key authentication such as RSA, DSA, ECDSA, and Ed255519. ssh-add and ssh-agent work on most variants of linux and unix, but also works on cygwin. ![]() ![]() #CYGWIN SSH SHELL HOW TO#This article is how to automatically add your private key to your ssh-agent keyring each time you open a shell (and remove it automatically when you close it) for automate passwords entries. ![]()
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