Step 2: Install Squid 6 with HTTPS Decryption

Default version of Squid in Ubuntu 22.04 LTS repository is quite old, so we will use newer version of Squid recompiled as indicated in article How to Build Squid 6 in Ubuntu 22.04.

Navigate to core sub folder and run script 02_squid.sh.

#!/bin/bash

# all packages are installed as root
if [[ $EUID -ne 0 ]]; then
   echo "This script must be run as root" 1>&2
   exit 1
fi

# add diladele apt key
wget -qO - https://packages.diladele.com/diladele_pub.asc | sudo apt-key add -

# add new repo
echo "deb https://squid69.diladele.com/ubuntu/ jammy main" \
   > /etc/apt/sources.list.d/squid69.diladele.com.list

# and install
apt-get update && apt-get install -y \
   squid-common \
   squid-openssl \
   squidclient \
   libecap3 libecap3-dev

# change the number of default file descriptors
OVERRIDE_DIR=/etc/systemd/system/squid.service.d
OVERRIDE_CNF=$OVERRIDE_DIR/override.conf

mkdir -p $OVERRIDE_DIR

# generate the override file
rm $OVERRIDE_CNF
echo "[Service]"         >> $OVERRIDE_CNF
echo "LimitNOFILE=65535" >> $OVERRIDE_CNF

# reload the systemd
systemctl daemon-reload