sirubo

Blocks outbound tech conglomerate (AS) network traffic.

Table of Contents

• Usage
• Description
• Requirements
• Motive
• Install
• Uninstall
• Files
  • Programs
  • Configurations
  • Services
• License

Usage

sirubo [c|create] [h|halt|stop] [r|resume] [s|show]

Command	Description
c create	Create and start ruleset enforcement and persistence.
h halt stop	Stop ruleset enforcement and persistence.
r resume	Resume ruleset enforcement and persistence.
s show	Show ruleset.

Description

The sirubo utility is a POSIX shell script that makes use of:

• Transport-layer packet filtering; in particular, nftables on Linux and pf on OpenBSD, to facilitate the rejection of outgoing traffic to autonomous system network, or ASN, prefixes (subnets).

• whois, to perform a query for ASN prefixes (subnets).

Requirements

Linux	OpenBSD
nftables	pf
whois	whois
systemd

Motive

Preventing passive and nonconsensual telemetry, and the infringement of one's privacy thereafter, from intrusively inquisitive big tech conglomerates, such as Meta (Facebook) and Alphabet (Google).

Install

1. Install sirubo:

sudo make install

2. To illustrate, add the following ASN to /usr/local/etc/sirubo.conf:

AS32934 # Google

3. Create a new firewall ruleset:

sirubo c

4. Test your newly created firewall ruleset:

nc -vw 1 google.com 443

The command should print a message similar to this:

nc: connect to google.com (0.0.0.0) port 443 (tcp) failed: Connection refused

This will indicate that your operating system firewall is configured to reject all outbound traffic directed at Google's ASN prefixes.

Uninstall

1. Within this repository, uninstall sirubo:

make uninstall

Or, optionally, uninstall sirubo and delete its configuration files:

make clean

Files

Programs

• /usr/local/bin/sirubo - The utility itself.

Configurations

• /usr/local/etc/sirubo.conf - Contains ASNs that you, the user, specify for rejection.
• /usr/local/etc/sirubo.ruleset - Contains a cached firewall ruleset.
• /usr/local/etc/sirubo.ruleset.backup - Contains a defunct firewall ruleset that is reserved as a backup when creating a new ruleset manually or automatically.

Services

• /etc/systemd/system/sirubo.service (Linux) - A service that facilitates firewall ruleset persistency and automatic ruleset updates with every operating system reboot.

• /etc/rc.d/sirubo (OpenBSD) - A service that facilitates firewall ruleset persistency and automatic ruleset updates with every operating system reboot.

License

See the LICENSE file for details.