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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 our rootCA with in the next command for generating the pem file for the rootCA.

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: 1024.

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.