How to Install Squid5.6 for Ubuntu20.4

Step 1

sudo apt -y install libssl-dev devscripts build-essential fakeroot debhelper dh-autoreconf dh-apparmor cdbs libcppunit-dev libsasl2-dev libxml2-dev libkrb5-dev libdb-dev libnetfilter-conntrack-dev libexpat1-dev libcap-dev libldap2-dev libpam0g-dev libgnutls28-dev libssl-dev libdbi-perl libecap3 libecap3-dev libsystemd-dev libtdb-dev

Step 2, git squid and configure

git clone https://github.com/squid-cache/squid.git squid
cd squid
git branch -r
git checkout v5
./bootstrap.sh
./configure --with-openssl --enable-ssl-crtd  --with-default-user=squid '--prefix=/usr' '--includedir=${prefix}/include' '--mandir=${prefix}/share/man' '--infodir=${prefix}/share/info' '--sysconfdir=/etc' '--localstatedir=/var' '--disable-silent-rules' '--libdir=${prefix}/lib/x86_64-linux-gnu' '--runstatedir=/run' '--datadir=/usr/share/squid' '--sysconfdir=/etc/squid' '--libexecdir=/usr/lib/squid' '--mandir=/usr/share/man' '--enable-inline' '--enable-async-io=8' '--enable-storeio=ufs,aufs,diskd,rock' '--enable-removal-policies=lru,heap' '--enable-delay-pools' '--enable-cache-digests' '--enable-icap-client' '--enable-follow-x-forwarded-for' '--with-swapdir=/var/spool/squid' '--with-logdir=/var/log/squid' '--with-pidfile=/run/squid.pid' '--with-large-files' '--with-default-user=proxy' '--enable-linux-netfilter' '--with-gnutls'
make
sudo make install

Step 3, edit squid.service file

sudo vi /lib/systemd/system/squid.service

[Unit]
Description=Squid Web Proxy Server
Documentation=man:squid(8)
After=network.target network-online.target nss-lookup.target

[Service]
Type=notify
PIDFile=/var/run/squid.pid
ExecStartPre=/usr/sbin/squid --foreground -z
ExecStart=/usr/sbin/squid --foreground -sYC
ExecReload=/bin/kill -HUP $MAINPID
KillMode=mixed
NotifyAccess=all

[Install]
WantedBy=multi-user.target

sudo systemctl daemon-reload 

Step 4, edit Squid.conf file

sudo vi /etc/squid/squid.conf

#
# Recommended minimum configuration:
#

# Example rule allowing access from your local networks.
# Adapt to list your (internal) IP networks from where browsing
# should be allowed
acl localnet src 0.0.0.1-0.255.255.255  # RFC 1122 "this" network (LAN)
acl localnet src 10.0.0.0/8             # RFC 1918 local private network (LAN)
acl localnet src 100.64.0.0/10          # RFC 6598 shared address space (CGN)
acl localnet src 169.254.0.0/16         # RFC 3927 link-local (directly plugged) machines
acl localnet src 172.16.0.0/12          # RFC 1918 local private network (LAN)
acl localnet src 192.168.0.0/16         # RFC 1918 local private network (LAN)
acl localnet src fc00::/7               # RFC 4193 local private network range
acl localnet src fe80::/10              # RFC 4291 link-local (directly plugged) machines

acl nobumpSites ssl::server_name "/etc/squid/nobumpSites.list"
acl intermediate_fetching transaction_initiator certificate-fetching
http_access allow intermediate_fetching

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 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
#
# Recommended minimum Access Permission configuration:
#
# 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

# Only allow cachemgr access from localhost
http_access allow localhost manager
http_access deny manager

# 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 deny all
# Squid normally listens to port 3128
http_port 3128 ssl-bump generate-host-certificates=on dynamic_cert_mem_cache_size=20MB cert=/etc/squid/certs/squid-ca-cert-key.pem cipher=HIGH:MEDIUM:!LOW:!RC4:!SEED:!IDEA:!3DES:!MD5:!EXP:!PSK:!DSS options=NO_TLSv1,NO_SSLv3,SINGLE_DH_USE,SINGLE_ECDH_USE tls-dh=prime256v1:/etc/squid/bump_dhparam.pem

sslproxy_cert_error allow all
acl step1 at_step SslBump1
acl step2 at_step SslBump2
acl step3 at_step SslBump3
ssl_bump peek step1 all 
ssl_bump peek step2 nobumpSites
ssl_bump splice step3 nobumpSites
ssl_bump stare step2
ssl_bump bump step3

# Uncomment and adjust the following to add a disk cache directory.
#cache_dir ufs /var/spool/squid 100 16 256
cache_dir ufs /opt/squid/cache 3000 16 256

# Leave coredumps in the first cache dir
coredump_dir /var/spool/squid

#
# 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

Step 5 , Setting Certs

openssl req -new -newkey rsa:2048 -sha256 -days 365 -nodes -x509 -extensions v3_ca -keyout squid-ca-key.pem -out squid-ca-cert.pem
cat squid-ca-cert.pem squid-ca-key.pem >> squid-ca-cert-key.pem
sudo cp squid-ca-cert-key.pem /etc/squid/certs/squid-ca-cert-key.pem
sudo chown proxy -R /etc/squid/certs/squid-ca-cert-key.pem
sudo openssl dhparam -outform PEM -out /etc/squid/bump_dhparam.pem 2048
sudo chown proxy -R /etc/squid/bump_dhparam.pem
sudo /usr/lib/squid/security_file_certgen -c -s /var/spool/squid/ssl_db -M 4MB

Step 6, Setting cache and start

sudo mkdir /opt/squid/cache
sudo vi /etc/squid/nobumpSites.list
.apple.com
:wq
sudo chown proxy -R /etc/squid/nobumpSites.list
sudo chown proxy -R /opt/squid/cache
sudo chown proxy -R /var/log/squid
sudo squid -z
sudo systemctl start squid.service
sduo systemctl enable squid.service

Step 7, Copy the certificate”squid-ca-cert.pem’ to a computer or system and trust the certificate,Set porxy port 3128

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