PFSense - Squid - Setup completely

Step 1. Configuring the root Certificate Authority (rootCA)

Navigate to System → Cert Manager.

Click the green Add button.

Populate:

Descriptive Name: SquidCA.
Method: Create an internal Certificate Authority. Leave at the default.
Key length (bits): 2048. Leave at the default.
Digest Algorith: sha256. Leave at the default.
Lifetime (days): 3650.
Common Name: internal-ca. Leave at the default.
Country Code: JE.
State or Province: Jersey.
City: St. Helier
Organization: ShareWiz.
Organizational Unit: IT.

NOTE: Alternatively create the CA externally of pfSense.

openssl genrsa -out myProxyCA.key 2048

This will create an rsa key file named myProxyCA.key that we use to sign the pem file we will generate next.

Create a pem file signed with the key:

openssl req -x509 -new -nodes -key myProxyCA.key -sha256 -days 365 -out myProxyCA.pem

This will prompt you to answer some questions to generate the pem file:

Country Name (2 letter code) [AU]:**JE**
State or Province Name (full name) [Some-State]:**Jersey**
Locality Name (eg, city) []:**St. Helier**
Organization Name (eg, company) [Internet Widgits Pty Ltd]:**ShareWiz**
Organizational Unit Name (eg, section) []:**IT**
Common Name (e.g. server FQDN or YOUR name) []:**sharewiz.net**
Email Address []:

At this point you should have 2 files:

myProxyCA.pem
myProxyCA.key

Import this CA into pfSense:

Navigate to System → Cert Manager.
Click the green Add button.
Descriptive Name: SquidCA.
Method: Import an existing Certificate Authority.
Certificate data: Copy \ Paste the info from myProxyCA.pem file.
Certificate Private Key (optional): Copy \ Paste the info from myProxyCA.key file.
Serial for next certificate: 1.
Save and apply.

Step 2. Configuration of Squid

Navigate to Services → Squid Proxy Server.

On the General Settings tab:

Squid General Settings

Enable Squid Proxy: Checked.
Keep Settings/Data: Checked.
Proxy Interface(s): LAN & Loopback.
Proxy Port: 3128. You can change this to a custom one if you like.
Allow Users on Interface: Yes.
Resolve DNS IPv4 First: Checked.

Transparent Proxy Settings:

Transparent HTTP Proxy: Checked.
Transparent Proxy Interface(s): LAN.

SSL Man In the Middle Filtering

HTTPS/SSL Interception: Checked.
SSL/MITM Mode: Splice All.
SSL Intercept Interface(s): LAN.
SSL Proxy Compatibility Mode: Modern.
DHParams Key Size: 2048.
CA: SquidCA. The Certificate Authority created earlier.
Remote Cert Checks: Do not verify remote certificates.
Certificate Adapt: Sets the “Not Before” (setvalidbefore).

Logging Settings

Enable Access Logging: Checked.
Log Store Directory: /var/squid/logs. The default.
Rotate Logs: 7.
Log Pages Denied by SquidGuard: Not checked.

Advanced Features

Custom Options (SSL/MITM):

# YouTube
acl serverIsYoutube ssl::server_name .ytimg.com
#acl serverIsYoutube ssl::server_name .youtube.com

# splice all the rest
ssl_bump splice all

On the Local Cache tab:

Squid Cache General Settings

Cache Replacement Policy: LFUDA.
Low-Water Mark in %: 90.
High-Water Mark in %: 95.

Do Not Cache:

steampowered.com
steamcommunity.com
steamgames.com
steamusercontent.com
steamcontent.com
steamstatic.com

Enable Offline Mode: Not checked.
External Cache Managers:

Squid Hard Disk Cache Settings

Hard Disk Cache Size: 50000.
Hard Disk Cache System: aufs.
Level 1 Directories: 64.
Hard Disk Cache Location: /var/squid/cache.
Minimum Object Size: 0.
Maximum Object Size: 2048.

Squid Memory Cache Settings

Memory Cache Size: 3072.
Maximum Object Size in RAM: 1024.
Memory Replacement Policy: Heap GDSF.

Dynamic and Update Content

Cache Dynamic Content: Checked.
Custom refresh_patterns: SEE Squid Refresh Patterns Master List.

On the Antivirus tab:

ClamAV Anti-Virus Integration Using C-ICAP

Enable AV: Checked.
Client Forward Options: Send both client username and IP info (Default).
Enable Manual Configuration: disabled.
Redirect URL: <blank>.
Google Safe Browsing: Checked.
Exclude Audio/Video Streams: Checked.
ClamAV Database Update: every one hour.
Regional ClamAV Database Update Mirror: United Kingdom.
Optional ClamAV Database Update Servers: <Blank>.

Step 3. Configuration of SquidGuard Proxy filter

Navigate to Services → SquidGuard Proxy filter.