[2/3] SSH: Add sntrup761x25519-sha512@openssh.com key exchange to configurations
Commit Message
This algorithm was introduced in OpenSSH 9.0p1; also, align the
curve25519-sha256* key exchanges to keep things tidy.
Signed-off-by: Peter Müller <peter.mueller@ipfire.org>
---
config/ssh/ssh_config | 2 +-
config/ssh/sshd_config | 5 ++---
2 files changed, 3 insertions(+), 4 deletions(-)
@@ -9,7 +9,7 @@ Host *
UseRoaming no
# Only use secure crypto algorithms
- KexAlgorithms curve25519-sha256@libssh.org,diffie-hellman-group-exchange-sha256
+ KexAlgorithms sntrup761x25519-sha512@openssh.com,curve25519-sha256,curve25519-sha256@libssh.org,diffie-hellman-group-exchange-sha256
Ciphers chacha20-poly1305@openssh.com,aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes192-ctr,aes128-ctr
MACs hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-512,hmac-sha2-256,umac-128@openssh.com
@@ -19,9 +19,8 @@ LoginGraceTime 30s
# Limit maximum instanctes to prevent DoS
MaxStartups 5
-# Only allow safe crypto algorithms (may break some _very_ outdated clients)
-# See also: https://stribika.github.io/2015/01/04/secure-secure-shell.html
-KexAlgorithms curve25519-sha256@libssh.org,diffie-hellman-group-exchange-sha256
+# Only allow safe crypto algorithms
+KexAlgorithms sntrup761x25519-sha512@openssh.com,curve25519-sha256,curve25519-sha256@libssh.org,diffie-hellman-group-exchange-sha256
Ciphers chacha20-poly1305@openssh.com,aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes192-ctr,aes128-ctr
MACs hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-512,hmac-sha2-256,umac-128@openssh.com