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ssh: enable curve25519-sha256 again... #325

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Merged
merged 1 commit into from
Nov 3, 2025
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ssh: enable curve25519-sha256 again... #325

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6 changes: 5 additions & 1 deletion modules/ssh.nix
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Original file line number Diff line number Diff line change
Expand Up @@ -90,11 +90,15 @@ in

services.openssh = lib.mkIf cfgS.recommendedDefaults {
settings = {
# following ssh-audit: nixos default minus 2048 bit modules (diffie-hellman-group-exchange-sha256) and not post-quantum safe (curve25519-sha256)
# following ssh-audit: nixos default minus 2048 bit modules (diffie-hellman-group-exchange-sha256)
# and including not post-quantum safe (curve25519-sha256) because of legacy systems and slow moving libraries...
KexAlgorithms = [
"mlkem768x25519-sha256"
"sntrup761x25519-sha512"
"[email protected]"
# not post-quantum safe but we cannot have nice things, yet...
"curve25519-sha256"
"[email protected]"
];
# following ssh-audit: nixos defaults
Macs = [
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