vpnmain.cgi: Reduce the number of offered ciphers

For new connections, we will now configure fewer ciphers by default. I
currently do not see any reason why we should support so many different
versions of AES-GCM and AES-128 by default.

The defaults should provide high security as well as decent
compatibility to solutions from other vendors.

I am currently not sure whether ChaCha20-Poly1305 should remain as
default as AES should usually outperform it by far. We can assume that
most hardware has support for AES-NI.

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

diff --git a/html/cgi-bin/vpnmain.cgi b/html/cgi-bin/vpnmain.cgi
index 05376e029637698d5684d5224565c4873aa196ce..a1d0f0e2ac819557371fec721afaa79302a34d40 100755 (executable)
--- a/html/cgi-bin/vpnmain.cgi
+++ b/html/cgi-bin/vpnmain.cgi
@@ -2382,11 +2382,11 @@ END
        $cgiparams{'REMOTE_ID'} = '';
 
        #use default advanced value
-       $cgiparams{'IKE_ENCRYPTION'}    = 'chacha20poly1305|aes256gcm128|aes256gcm96|aes256gcm64|aes256|aes192gcm128|aes192gcm96|aes192gcm64|aes192|aes128gcm128|aes128gcm96|aes128gcm64|aes128'; #[18];
+       $cgiparams{'IKE_ENCRYPTION'}            = 'chacha20poly1305|aes256gcm128|aes256'; #[18];
        $cgiparams{'IKE_INTEGRITY'}             = 'sha2_512|sha2_256'; #[19];
        $cgiparams{'IKE_GROUPTYPE'}             = 'mlkem1024|mlkem768|mlkem512|curve448|curve25519|e521|e384|4096|3072'; #[20];
        $cgiparams{'IKE_LIFETIME'}              = '3'; #[16];
-       $cgiparams{'ESP_ENCRYPTION'}    = 'chacha20poly1305|aes256gcm128|aes256gcm96|aes256gcm64|aes256|aes192gcm128|aes192gcm96|aes192gcm64|aes192|aes128gcm128|aes128gcm96|aes128gcm64|aes128'; #[21];
+       $cgiparams{'ESP_ENCRYPTION'}            = 'chacha20poly1305|aes256gcm128|aes256'; #[21];
        $cgiparams{'ESP_INTEGRITY'}             = 'sha2_512|sha2_256'; #[22];
        $cgiparams{'ESP_GROUPTYPE'}             = 'mlkem1024|mlkem768|mlkem512|curve448|curve25519|e521|e384|4096|3072'; #[23];
        $cgiparams{'ESP_KEYLIFE'}               = '1'; #[17];