diff --git a/roles/linux_common/tasks/amazon.yml b/roles/linux_common/tasks/amazon.yml index c77541b..a036fdb 100644 --- a/roles/linux_common/tasks/amazon.yml +++ b/roles/linux_common/tasks/amazon.yml @@ -7,3 +7,12 @@ - libxml2 - git-{{ git_version }} - dejavu-sans-fonts + +- name: Limit the SSH ciphers + lineinfile: + path: "/etc/ssh/sshd_config" + # Drop insecure ciphers, currently 3des-cbc only. You can get the + # full list with `sshd -T | grep -i ciphers` + line: "Ciphers chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,aes128-cbc,aes192-cbc,aes256-cbc,blowfish-cbc,cast128-cbc" + insertbefore: "BOF" + ignore_errors: yes # No sshd == no problem