SSL Cloudflare TLS 1.3 Error for some computers ERR_SSL_VERSION_INTERFERENCE

• CentOS Version:CentOS 7 64bit
• Centmin Mod Version Installed: Beta
• Nginx Version Installed: 1.15.4
• PHP Version Installed: 7.1.21
• MariaDB MySQL Version Installed: 10.0.x
• When was last time updated Centmin Mod code base ? : today
• Persistent Config:
  
  Code (Text):

  POSTGRESQL=y
  
  PHPFINFO=y
  
  NGINX_PAGESPEED=y
  
  NGXDYNAMIC_NGXPAGESPEED=y
  
  NGINX_GEOIP=n
  
  PHPIONCUBE='n'
  
  PHPIMAGICK='y'
  
  VHOSTCTRL_CLOUDFLAREINC='y'
  
  CLOUDFLARE_ZLIB='y'
  
  CLOUDFLARE_ZLIBPHP='y'
  
  

Nginx -V Output

Code:

[01:49][root@server ~]# nginx -V
nginx version: nginx/1.15.4 (300918-024026)
built by gcc 7.3.1 20180303 (Red Hat 7.3.1-5) (GCC)
built with OpenSSL 1.1.1  11 Sep 2018
TLS SNI support enabled
configure arguments: --with-ld-opt='-Wl,-E -L/usr/local/zlib-cf/lib -L/usr/local/lib -ljemalloc -Wl,-z,relro -Wl,-rpath,/usr/local/zlib-cf/lib:/usr/local/lib' --with-cc-opt='-I/usr/local/zlib-cf/include -I/usr/local/include -m64 -march=native -DTCP_FASTOPEN=23 -g -O3 -fstack-protector-strong -flto -fuse-ld=gold --param=ssp-buffer-size=4 -Wformat -Werror=format-security -Wimplicit-fallthrough=0 -fcode-hoisting -Wp,-D_FORTIFY_SOURCE=2 -gsplit-dwarf' --sbin-path=/usr/local/sbin/nginx --conf-path=/usr/local/nginx/conf/nginx.conf --build=300918-024026 --with-compat --with-http_stub_status_module --with-http_secure_link_module --with-libatomic --with-http_gzip_static_module --with-http_sub_module --with-http_addition_module --with-http_image_filter_module=dynamic --with-http_geoip_module --with-stream_geoip_module --with-stream_realip_module --with-stream_ssl_preread_module --with-threads --with-stream=dynamic --with-stream_ssl_module --with-http_realip_module --add-dynamic-module=../ngx-fancyindex-0.4.2 --add-module=../ngx_cache_purge-2.4.2 --add-dynamic-module=../ngx_devel_kit-0.3.0 --add-dynamic-module=../set-misc-nginx-module-0.32 --add-dynamic-module=../echo-nginx-module-0.61 --add-module=../redis2-nginx-module-0.15 --add-module=../ngx_http_redis-0.3.7 --add-module=../memc-nginx-module-0.18 --add-module=../srcache-nginx-module-0.31 --add-dynamic-module=../headers-more-nginx-module-0.33 --with-pcre-jit --with-http_ssl_module --with-http_v2_module --with-openssl=../openssl-1.1.1 --with-openssl-opt='enable-ec_nistp_64_gcc_128 enable-tls1_3'

I'm using cloudflare for ssl also all other optimizations on pro plan, but yesterday my friend told me that he can't access my website. When he type my website to chrome and internet explorer (windows 7 pc) address bar, my website gives an error like "ERR_SSL_VERSION_INTERFERENCE" (Chrome Connection Reset, Standart Error Screen)

After i explore the web, that problem looks for TLS 1.3 supported websites then i go to check my cloudflare settings and Disabled TLS 1.3 Support. And, bingo! Website accessible when i disabled it.

So what is the problem exactly? when i look my server, it supports tls 1.3. However, i don't use ssl by centmin server, i'm using just cloudflare dedicated paid certificate and all ssl and optimizations by cloudflare as i told? Anyway, should i modify some settings on my centmin side?

Thanks

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Yeah, that computer was using the norton antivirus and i've tried (with teamviewer) to disable it and tried again but still no luck. So, disabling antivirus software doesn't work.

I think, i must disable tls 1.3 from cloudflare for connect to everyone.

 

I didn't remind them. But both browsers can't open the website.

I've disabled the TLS 1.3 yesterday on cloudflare so works now on all browsers.

 

Yes, i though lost some visitors for a long time because of cloudflare tls 1.3 support.