Hello Team, I need some help in configuring cipher suite ordering. I am using squid with SSL configs and trying to configure the cipher order but not able to do so, I am using below sites to check my chipher ordering and its showing different ordering then what I have configured.
https://www.howsmyssl.com https://clienttest.ssllabs.com:8443/ssltest/viewMyClient.html Below is my compiled squid details - squid -v Squid Cache: Version 5.0.4 Service Name: squid This binary uses OpenSSL 1.1.1g FIPS 21 Apr 2020. For legal restrictions on distribution see https://www.openssl.org/source/license.html configure options: '--prefix=/app/squid' '--with-openssl' '--enable-ssl-crtd' '--with-filedescriptors=5000' '--enable-storeio=diskd,aufs,ufs' '--with-large-files' '--enable-useragent-log' '--enable-ltdl-convenience' '--with-tls' '--enable-http-violations' OS I am using - CentOS Linux release 8.3.2011 I have tried changing the ordering as with below parameters but with no luck - http_port 443 tcpkeepalive=60,30,3 ssl-bump generate-host-certificates=on dynamic_cert_mem_cache_size=512MB tls-cert=/app/squid/etc/certs/ProxyBump.crt tls-key=/app/squid/etc/certs/ProxyBump.key cipher=TLS_AES_128_GCM_SHA256:TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:!RC4:!aNULL:!eNULL:!LOW:!MEDIUM:!3DES:!MD5:!EXP:!PSK:!SRP:!DSS options=NO_SSLv3,SINGLE_DH_USE tls-dh=prime256v1:/app/squid/etc/certs/ProxyBump.pem tls_outgoing_options min-version=1.2 cipher=TLS_AES_128_GCM_SHA256:TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:EE CDHE-RSA-CHACHA20-POLY1305:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:!RC4:!aNULL:!eNULL:!LOW:!MEDIUM:!3DES:!MD5:!EXP:!PSK:!SRP:!DSS options=NO_SSLv3,SINGLE_DH_USE Below is the cipher list order I am expecting but it is not the case. TLS_AES_128_GCM_SHA256 TLS_AES_256_GCM_SHA384 TLS_CHACHA20_POLY1305_SHA256 TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA TLS_RSA_WITH_AES_128_GCM_SHA256 TLS_RSA_WITH_AES_256_GCM_SHA384 TLS_RSA_WITH_AES_128_CBC_SHA TLS_RSA_WITH_AES_256_CBC_SHA Below is my full config file - # # Recommended minimum configuration: # acl manager proto cache_object #acl localhost src 127.0.0.1/32 #acl to_localhost dst 127.0.0.0/8 # Example rule allowing access from your local networks. # Adapt to list your (internal) IP networks from where browsing # should be allowed acl localnet src 10.0.0.0/8 # RFC1918 possible internal network acl localnet src 172.16.0.0/12 # RFC1918 possible internal network acl localnet src 192.168.0.0/16 # RFC1918 possible internal network #acl localnet src fc00::/7 # RFC 4193 local private network range #acl localnet src fe80::/10 # RFC 4291 link-local (directly plugged) machines acl SSL_ports port 443 acl SSL_ports port 8443 acl Safe_ports port 80 # http acl Safe_ports port 21 # ftp acl Safe_ports port 443 # https acl Safe_ports port 70 # gopher acl Safe_ports port 210 # wais acl Safe_ports port 1025-65535 # unregistered ports acl Safe_ports port 280 # http-mgmt acl Safe_ports port 488 # gss-http acl Safe_ports port 591 # filemaker acl Safe_ports port 777 # multiling http acl Safe_ports port 8443 # multiling http acl CONNECT method CONNECT acl intermediate_fetching transaction_initiator certificate-fetching # # Recommended minimum Access Permission configuration: # # Only allow cachemgr access from localhost http_access allow intermediate_fetching http_access allow manager localhost http_access deny manager # Deny requests to certain unsafe ports http_access deny !Safe_ports # Deny CONNECT to other than secure SSL ports http_access deny CONNECT !SSL_ports # We strongly recommend the following be uncommented to protect innocent # web applications running on the proxy server who think the only # one who can access services on "localhost" is a local user #http_access deny to_localhost # # INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS # # Example rule allowing access from your local networks. # Adapt localnet in the ACL section to list your (internal) IP networks # from where browsing should be allowed http_access allow localnet http_access allow localhost # And finally deny all other access to this proxy http_access allow all # Squid normally listens to port 3128 http_port 443 tcpkeepalive=60,30,3 ssl-bump generate-host-certificates=on dynamic_cert_mem_cache_size=512MB tls-cert=/app/squid/etc/certs/ProxyBump.crt tls-key=/app/squid/etc/certs/ProxyBump.key cipher=TLS_AES_128_GCM_SHA256:TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:!RC4:!aNULL:!eNULL:!LOW:!MEDIUM:!3DES:!MD5:!EXP:!PSK:!SRP:!DSS options=NO_SSLv3,SINGLE_DH_USE tls-dh=prime256v1:/app/squid/etc/certs/ProxyBump.pem sslcrtd_program /app/squid/etc/libexec/security_file_certgen -s /var/lib/squid/ssl_db -M 512MB sslproxy_cert_error allow all ssl_bump stare all tls_outgoing_options min-version=1.2 cipher=TLS_AES_128_GCM_SHA256:TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:EE CDHE-RSA-CHACHA20-POLY1305:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:!RC4:!aNULL:!eNULL:!LOW:!MEDIUM:!3DES:!MD5:!EXP:!PSK:!SRP:!DSS options=NO_SSLv3,SINGLE_DH_USE cache_mem 1024 MB # Uncomment and adjust the following to add a disk cache directory. cache_dir aufs /app/squid/var/cache/squid 1024 16 256 shutdown_lifetime 10 seconds # Leave coredumps in the first cache dir coredump_dir /app/squid/var/cache/squid logformat squid %ts.%03tu %6tr %>a %Ss/%03>Hs %<st %rm %ru %[un %Sh/%<A %mt %>h %Se %>sh logformat extended %tl %6tr %>a %Ss/%03Hs %<st %rm %ru %un %Sh/%<A %mt %Hs %<st "%{Referer}>h" "%{User-agent}>h" server_persistent_connections off logfile_rotate 30 # Add any of your own refresh_pattern entries above these. refresh_pattern ^ftp: 1440 20% 10080 refresh_pattern ^gopher: 1440 0% 1440 refresh_pattern -i (/cgi-bin/|\?) 0 0% 0 refresh_pattern . 0 20% 4320 cache_peer 1.2.3.4 parent 8080 0 no-query default login=abc:xyz never_direct allow all cache_log /app/squid/var/logs/cache.log access_log /app/squid/var/logs/access.log access_log /app/squid/var/logs/access.log.mitm extended pid_filename /app/squid/var/run/squid.pid max_filedescriptors 5000 Please let me know, If I am missing anything. Thanks, Vinod
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