Squid https aufbrechen

Installation von squid

Wir brauchen eine angepasste Version von squid

Diese können wir selbst komplilieren oder das squid-openssl Paket von nutzen

• apt install squid-openssl

Erstellen eines Selbstsignierten Zertifikates

Variablen setzen und Verzeichnis anlegen

• CERT_D=/etc/squid/certs/
• CERT=$CERT_D/squid_proxyCA.pem
• rm -rf $CERT
• mkdir -p $CERT_D

Generieren Sie ein lokales selbstsigniertes CA-Zertifikat und geheimen Schlüssel (in derselben Datei))

• openssl req -new -newkey rsa:4096 -sha256 -days 365 -nodes -x509 -keyout $CERT -out $CERT
• chown -R proxy:proxy $CERT_D
• chmod 0400 $CERT

füge das squid_proxyCA-Zertifikat zum System hinzu, damit es standardmäßig vertrauenswürdig ist

• CA_CERT_D=/usr/local/share/ca-certificates
• rm -rf $CA_CERT_D/*
• mkdir -p $CA_CERT_D
• openssl x509 -inform PEM -in $CERT -out $CA_CERT_D/squid_proxyCA.crt
• update-ca-certificates

Die squid.conf

acl SSL_ports port 443

acl Safe_ports port 80          # http
acl Safe_ports port 21          # ftp
acl Safe_ports port 443         # https
acl Safe_ports port 1025-65535  # unregistered ports

acl purge method PURGE
acl CONNECT method CONNECT
acl lan src 10.0.10.0/24

http_access allow manager localhost
http_access deny manager

http_access allow purge localhost
http_access deny purge

http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports

http_access allow lan
http_access allow localhost
http_access deny all

http_port 3128 ssl-bump cert=/etc/squid/certs/squid_proxyCA.pem generate-host-certificates=on options=NO_SSLv3,NO_TLSv1,NO_TLSv1_1,SINGLE_DH_USE,SINGLE_ECDH_USE
ssl_bump bump all

coredump_dir /var/spool/squid
logfile_rotate 0

refresh_pattern -i (/cgi-bin/|\?) 0 0%  0
refresh_pattern .       0   20% 4320

cache_dir ufs /var/spool/squid 200 16 256

Restart von Squid

• systemctl restart squid

Die squid.conf

acl SSL_ports port 443

acl Safe_ports port 80          # http
acl Safe_ports port 21          # ftp
acl Safe_ports port 443         # https
acl Safe_ports port 1025-65535  # unregistered ports

acl purge method PURGE
acl CONNECT method CONNECT
acl lan src 10.0.10.0/24

http_access allow manager localhost
http_access deny manager

http_access allow purge localhost
http_access deny purge

http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports

http_access allow lan
http_access allow localhost
http_access deny all

http_port 3128 ssl-bump cert=/etc/squid/certs/squid_proxyCA.pem generate-host-certificates=on options=NO_SSLv3,NO_TLSv1,NO_TLSv1_1,SINGLE_DH_USE,SINGLE_ECDH_USE
ssl_bump bump all

coredump_dir /var/spool/squid
logfile_rotate 0

refresh_pattern -i (/cgi-bin/|\?) 0 0%  0
refresh_pattern .       0   20% 4320

cache_dir ufs /var/spool/squid 200 16 256