From 5b2e13d18f4720792469c52285e2a63cd18b74cb Mon Sep 17 00:00:00 2001 From: Jauder Ho Date: Mon, 17 Apr 2017 20:17:40 -0700 Subject: [PATCH] Only enable ChaCha cipher (#412) * Only enable ChaCha cipher * Add back a few ciphers for compatability --- roles/security/templates/sshd_config.j2 | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-) diff --git a/roles/security/templates/sshd_config.j2 b/roles/security/templates/sshd_config.j2 index 984f45c..1485466 100644 --- a/roles/security/templates/sshd_config.j2 +++ b/roles/security/templates/sshd_config.j2 @@ -45,10 +45,8 @@ HostKey /etc/ssh/ssh_host_ecdsa_key HostKey /etc/ssh/ssh_host_ed25519_key # Use only modern ciphers -KexAlgorithms curve25519-sha256@libssh.org,ecdh-sha2-nistp521,ecdh-sha2-nistp384,ecdh-sha2-nistp256 -Ciphers chacha20-poly1305@openssh.com,aes256-gcm@openssh.com,aes128-gcm@openssh.com -MACs hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com,umac-128-etm@openssh.com -# TODO: I haven't seen anyone review these yet -# HostKeyAlgorithms ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ssh-ed25519-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519 -# TODO: I haven't seen anyone review these yet -# PubkeyAcceptedKeyTypes ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ssh-ed25519-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519 +KexAlgorithms curve25519-sha256@libssh.org,ecdh-sha2-nistp256 +Ciphers chacha20-poly1305@openssh.com,aes128-gcm@openssh.com +MACs hmac-sha2-256-etm@openssh.com +HostKeyAlgorithms ssh-ed25519,ecdsa-sha2-nistp256 +# PubkeyAcceptedKeyTypes accept anything