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Reply to topic   Topic: TLS 1.2 vs 1.3 problem

Joined: 17 Apr 2015
Posts: 75
Location: US

PostPosted: Thu 05 Oct '23 19:31    Post subject: TLS 1.2 vs 1.3 problem Reply with quote

I have updated my SSL certificates from one provider to another for cost reasons. IT's not LE.

I had this in my config:

# from https://cipherli.st/
#SSLProtocol All -SSLv2 -SSLv3 -TLSv1 -TLSv1.1

#SSLOptions +StrictRequire +StdEnvVars -ExportCertData
#SSLProtocol -all +TLSv1.2 +TLSv1.3
#SSLCompression Off
#SSLHonorCipherOrder On
#SSLCipherSuite TLSv1.3 TLS_CHACHA20_POLY1305_SHA256:TLS_AES_256_GCM_SHA384

Shortly after restarting, my monitoring service began failing. Support said they don't have TLS 1.3 support yet. Initially, I thought it was the CDN that didn't support TLS 1.3 as that was changed (learned it was the prior week). I ran a Qualys test and sure enough 1.2 was not enabled.

Oddly another host on the same server had a slightly different config (which was using the new SSL provider successfully). So, I changed to this one:

   SSLProtocol All -SSLv2 -SSLv3 -TLSv1 -TLSv1.1
   SSLHonorCipherOrder On

   SSLOpenSSLConfCmd ECDHParameters secp521r1
   SSLOpenSSLConfCmd Curves sect571r1:sect571k1:secp521r1:sect409k1:sect409r1:secp384r1:sect283k1:sect283r1:secp256k1:prime256v1

   SSLOpenSSLConfCmd SignatureAlgorithms rsa_pss_rsae_sha512:rsa_pss_rsae_sha256:ECDSA+SHA512:ECDSA+SHA256:RSA+SHA512:RSA+SHA256
   SSLOpenSSLConfCmd ClientSignatureAlgorithms rsa_pss_rsae_sha512:rsa_pss_rsae_sha256:ECDSA+SHA512:ECDSA+SHA256:RSA+SHA512:RSA+SHA256   

As it's production, I kind of don't want to fuss with it too much. I think it's the SSLCipherSuite TLS1.3 that is causing issues. Maybe I need a TLS1.2 version of that with ciphers?
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James Blond

Joined: 19 Jan 2006
Posts: 7252
Location: Germany, Next to Hamburg

PostPosted: Mon 09 Oct '23 11:35    Post subject: Reply with quote

My current A+ config v 1.2 and v 1.3


Listen 443
<If "%{SERVER_PORT} == '443'">
        <IfModule mod_headers.c>
                Header always set Strict-Transport-Security "max-age=31536000; preload"

ProtocolsHonorOrder On
Protocols h2 h2c
H2Upgrade on
H2Direct On
H2Push on

TraceEnable Off

SSLUseStapling On
SSLSessionCache shmcb:logs/ssl_gcache_data(512000)
SSLStaplingCache shmcb:logs/ssl_stapling_data(512000)
SSLOptions +StrictRequire +StdEnvVars -ExportCertData
SSLProtocol -all +TLSv1.2 +TLSv1.3
SSLCompression Off
SSLHonorCipherOrder On
SSLCipherSuite TLSv1.3 TLS_CHACHA20_POLY1305_SHA256:TLS_AES_256_GCM_SHA384

SSLOpenSSLConfCmd DHParameters "conf/8192.key"
SSLOpenSSLConfCmd ECDHParameters secp521r1
SSLOpenSSLConfCmd Curves secp521r1:secp384r1
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