![]() If you only have a few users, you can create a single account on the bastion that everyone will use, and make sure all of their public keys are added to it.Make sure you can still ssh into the machine before you continue! □ You can test your configuration with sshd -t, then restart the SSHD server. ![]() ![]() Mozilla recommends only using 3071-bit or greater moduli for extra security. Moduli are used for key exchange at the start of an SSH connection. Here are the guidelines that are still relevant to OpenSSH 8.2: ![]() Unfortunately their guide only covers up to OpenSSH 6.7. We recommend enforcing Mozilla's OpenSSH security guide. We'll need to do a few things to get our bastion ready. Set up a firewall or security group policy to restrict connections to the bastion to port 22 (SSH), and, if you can, only allow connections from IPs you trust. We'll use Ubuntu 20.04 LTS because it is simple, it's well supported, and it includes the recently-released OpenSSH 8.2. Stand up a Linux instance on your favorite cloud provider.
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