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GNU AFFERO GENERAL PUBLIC LICENSE
Version 3, 19 November 2007
Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies
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Preamble
The GNU Affero General Public License is a free, copyleft license for
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How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
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state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
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This program is free software: you can redistribute it and/or modify
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This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
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You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If your software can interact with users remotely through a computer
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of the code. There are many ways you could offer source, and different
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specific requirements.
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU AGPL, see
<http://www.gnu.org/licenses/>.

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# Install Debian on Oracle Cloud
## Debian Image
To set up a (ARM64-based) Debian OS on Oracle Cloud, download the [Generic Cloud qcow2 image](https://cloud.debian.org/images/cloud/bookworm-backports/daily/).
### Upload the image to the storage bucket
### Import it as a Custom image
Image type: QCOW2
Launch mode: Native mode
### Edit image details
Compatible shapes: VM.Standard.A1.Flex
### Edit image capabilities
Fireware: UEFI_64
Launch Mode: Custom
Consistent volume naming: Disabled
## Create compute instance
### Image and shape
My Images: debian-12-backports-genericcloud-arm64
VM.Standard.A1.FlexAlways (Free-eligible)
### Primary VNIC IP addresses
Check IPv6 Address, IPv4 should be already checked.
Automatically assign IPv6 addresses from prefix
### Upload public key files (.pub)
### Boot Volume
Use in-transit encryption
## Virtual cloud networks
Virtual cloud networks > vcn > Security List Details
### Ingress rules
Stateless | Source | IP Protocol | Source Port Range | Destination Port Range | Type and Code | Allows | Description
------- | ------- | ------- | ------- | ------- | ------- | ------- | -------
No | 0.0.0.0/0 | ICMP | 3, 4 | ICMP traffic for: 3, 4 Destination Unreachable: Fragmentation Needed and Don't Fragment was Set | |
No | [IPv4 CIDR Block] | ICMP | 3 | ICMP traffic for: 3 Destination Unreachable | |
No | ::/0 | IPv6-ICMP | 2 | IPv6-ICMP traffic for: 2 Packet Too Big | |
No | [IPv4 CIDR Block] | ICMP | 8 | ICMP traffic for: 8 Echo | |
No | [IPv6 Prefix] | ICMP | 8 | ICMP traffic for: 8 Echo | |
No | 0.0.0.0/0 | UDP | All | [Wireguard Port] | | UDP traffic for ports: [Wireguard Port] | |
No | [Wireguard Subnet]/32 | TCP | All | [SSH Port] | | TCP traffic for ports: [SSH Port] | |
No | [IPv4 CIDR Block] | TCP | All | All | | TCP traffic for ports: All | |
No | [IPv6 Prefix] | TCP | All | All | | TCP traffic for ports: All | |
### Egress rules
Stateless | Source | IP Protocol | Source Port Range | Destination Port Range | Type and Code | Allows | Description
------- | ------- | ------- | ------- | ------- | ------- | ------- | -------
No | 0.0.0.0/0 | All Protocols | | | | All traffic for all ports | |
No | ::/0 | All Protocols | | | | All traffic for all ports | |

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# Ansible role for setting up VPSs for Opnxng
An Ansible role that set up VPSs specifically for Opnxng. It applies to Debian-based servers in any arch.
## Oracle Cloud
To install Debian on Oracle Cloud, refer to [this documentation](ORACLECLOUD.md)
## Configurations
You can modify the [packages to be installed](set-up.yaml) and the [UFW rules](roles/ufw/tasks/main.yml).
## Contact
Please contact us via [email](mailto:opnxng@tuta.io) if you discover any vulnerability or area for improvement in our infrastructure. We would truly appreciate it.

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oracle:
hosts:
oracle1:
ansible_host: [REDACTED]
wireguard_ip: 10.123.0.1
oracle2:
ansible_host: [REDACTED]
wireguard_ip: 10.123.0.2
oracle3:
ansible_host: [REDACTED]
wireguard_ip: 10.123.0.3
oracle4:
ansible_host: [REDACTED]
wireguard_ip: 10.123.0.4
vars:
ansible_ssh_private_key_file: [REDACTED]
ansible_user: [REDACTED]
ansible_ssh_port: [REDACTED]
pipelining: true
ansible_ssh_common_args: "-o StrictHostKeyChecking=no"
ansible_python_interpreter: /usr/bin/python3
TZ: Asia/Singapore
wireguard_mask_bits: 24
wireguard_port: [REDACTED]
# ----------------------------------------------------------------------------------------------------
cloudcompute:
hosts:
vultr:
ansible_host: [REDACTED]
wireguard_ip: 10.123.0.5
vars:
ansible_ssh_private_key_file: [REDACTED]
ansible_user: [REDACTED]
ansible_ssh_port: [REDACTED]
pipelining: true
ansible_ssh_common_args: "-o StrictHostKeyChecking=no"
ansible_python_interpreter: /usr/bin/python3
TZ: Asia/Singapore
wireguard_mask_bits: 24
wireguard_port: [REDACTED]

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- name: Install chrony
apt:
name:
- chrony
state: latest
install_recommends: false
- name: Enable Chrony (NTP) service
service:
name: chrony
enabled: true
state: started

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- name: Determine the architecture
command: dpkg --print-architecture
register: buildx_arch
changed_when: false
- name: Get the latest Docker Buildx version
shell: >
curl -s https://api.github.com/repos/docker/buildx/releases/latest |
grep "tag_name" |
cut -d '"' -f 4
register: buildx_version
changed_when: false
- name: Fail if version is not found
fail:
msg: "Failed to fetch the latest Docker Buildx version. Exiting."
when: buildx_version.stdout == ""
- name: Define the directory for Docker plugins
set_fact:
plugins_dir: "/home/{{ user }}/.docker/cli-plugins"
- name: Create the plugins directory
file:
path: "{{ plugins_dir }}"
state: directory
- name: Download and install Docker Buildx
ansible.builtin.get_url:
url: "https://github.com/docker/buildx/releases/download/{{ buildx_version.stdout }}/buildx-{{ buildx_version.stdout }}.linux-{{ buildx_arch.stdout }}"
dest: "{{ plugins_dir }}/docker-buildx"
mode: '0755'
owner: 1000
group: 1000
- name: Make Docker Buildx executable
command: chmod +x "{{ plugins_dir }}/docker-buildx"
args:
creates: "{{ plugins_dir }}/docker-buildx"

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- name: Remove all docker buildx resources
shell: |
yes | docker buildx prune -a
no_log: true
ignore_errors: yes
- name: docker logout
command: docker logout
- name: Remove docker buildx
command: rm /home/{{ user }}/.docker/cli-plugins/docker-buildx

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- name: Install packages
apt:
name:
- docker.io
- docker-compose
state: latest
install_recommends: false
# ---------------------------------------------------------------------------------------------------
- name: Create Docker directory
file:
path: /home/{{ user }}/Docker
state: directory
owner: 1000
group: 1000
mode: 0755
# ---------------------------------------------------------------------------------------------------
- name: Set permissions for Docker socket
file:
path: /var/run/docker.sock
mode: 0666
- name: Add user to Docker group
user:
name: {{ user }}
groups: docker
append: true
# ---------------------------------------------------------------------------------------------------
- name: Set up Docker daemon configuration file to enable IPv6
template:
src: "daemon.json.j2"
dest: "/etc/docker/daemon.json"
owner: 0
group: 0
mode: 0600
- name: Restart docker
service:
name: docker
enabled: true
state: restarted

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{
"experimental": true,
"ip6tables": true
}

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- name: Install fail2ban
apt:
name:
- fail2ban
state: latest
install_recommends: false
- name: Copy fail2ban conf
template:
src: "jail.local.j2"
dest: "/etc/fail2ban/jail.local"
owner: root
group: root
mode: 0644
- name: Ensure fail2ban is running and enabled on boot.
service:
name: fail2ban
state: started
enabled: true

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[DEFAULT]
# Disable backend = auto as a Debian workaround
# https://github.com/fail2ban/fail2ban/issues/3292
backend = systemd
logtarget = SYSTEMD-JOURNAL
[sshd]
#mode = normal
port = {{ ssh_port }}
logpath = %(sshd_log)s
backend = %(sshd_backend)s
enable = true

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- name: Install NFS
apt:
name:
- nfs-kernel-server
state: latest
install_recommends: false
- name: Copy NFS Config
template:
src: "exports.j2"
dest: "/etc/exports"
mode: '0644'
owner: root
group: root
- name: Exportfs
command: exportfs -a
ignore_errors: yes
- name: Restart NFS service
systemd:
name: nfs-kernel-server
state: restarted

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# {{ ansible_managed }}
/home/{{ user }} {{ wireguard_mesh_control_host }}/24(rw,sync,no_root_squash,no_subtree_check)

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- name: Copy SSH config
template:
src: sshd.conf.j2
dest: /etc/ssh/sshd_config.d/sshd.conf
owner: 0
group: 0
mode: 0600
# ----------------------------------------------------------------------------------------------------------------
- name: Restart SSH service
systemd:
name: sshd
state: restarted
# ----------------------------------------------------------------------------------------------------------------
- name: Create .ssh directory if it doesn't exist
file:
path: "/home/{{ user }}/.ssh"
state: directory
mode: '0700'
owner: "1000"
group: "1000"
- name: Set permissions for authorized_keys
file:
path: "{{ ansible_env.HOME }}/.ssh/authorized_keys"
state: touch
mode: '0600'
owner: "1000"
group: "1000"
# stat -c "%a %n" .ssh/*
# ls -al .ssh

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# {{ ansible_managed }}
Port {{ ssh_port }}
PermitRootLogin no
PasswordAuthentication no
AddressFamily inet
ChallengeResponseAuthentication no
AllowUsers {{ user }}
KbdInteractiveAuthentication no
UsePAM yes
X11Forwarding no

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- name: Install UFW
apt:
name:
- ufw
state: latest
install_recommends: false
# ----------------------------------------------------------------------------------------------------
- name: UFW allow {{ wireguard_port }} UDP for Wireguard
community.general.ufw:
rule: allow
src: 0.0.0.0/0
dest: any
proto: udp
port: {{ wireguard_port }}
# ----------------------------------------------------------------------------------------------------
- name: UFW allow {{ ssh_port }} TCP
community.general.ufw:
rule: allow
src: {{ wireguard_mesh_subnet }}/16
dest: any
proto: tcp
port: {{ ssh_port }}
# ----------------------------------------------------------------------------------------------------
- name: UFW allow 8870 from {{ oracle_ipv4_cidr_block }}/16 TCP for Socks Proxy
community.general.ufw:
rule: allow
src: {{ oracle_ipv4_cidr_block }}/16
dest: any
proto: tcp
port: 8870
when:
- inventory_hostname in groups["oracle"]
- name: UFW allow 8870 from {{ wireguard_mesh_subnet }}/16 TCP for Socks Proxy
community.general.ufw:
rule: allow
src: {{ wireguard_mesh_subnet }}/16
dest: any
proto: tcp
port: 8870
- name: UFW allow NFS TCP
community.general.ufw:
rule: allow
src: {{ wireguard_mesh_subnet }}/16
dest: any
proto: tcp
port: 2049
# ----------------------------------------------------------------------------------------------------
- name: UFW allow 80 TCP
community.general.ufw:
rule: allow
src: any
dest: any
proto: tcp
port: 80
when: inventory_hostname == 'oracle4'
- name: UFW allow 443 TCP
community.general.ufw:
rule: allow
src: any
dest: any
proto: tcp
port: 443
when: inventory_hostname == 'oracle4'
- name: UFW allow 443 UDP
community.general.ufw:
rule: allow
src: any
dest: any
proto: udp
port: 443
when: inventory_hostname == 'oracle4'
# ----------------------------------------------------------------------------------------------------
- name: UFW default deny routed
community.general.ufw:
default: deny
direction: routed
- name: UFW default deny incoming
community.general.ufw:
default: deny
direction: incoming
- name: UFW default allow outgoing
community.general.ufw:
default: allow
direction: outgoing
# ----------------------------------------------------------------------------------------------------
- name: UFW enable
community.general.ufw:
state: enabled

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- name: Install packages
apt:
name:
- unattended-upgrades
- apt-listchanges
state: latest
install_recommends: false
# ----------------------------------------------------------------------------------------------------
- name: Copy unattended-upgrades configuration files in place.
template:
src: "{{ item }}.j2"
dest: "/etc/apt/apt.conf.d/{{ item }}"
owner: root
group: root
mode: 0644
with_items:
- 20auto-upgrades
- 50unattended-upgrades
- name: Enable unattended-upgrades service
service:
name: unattended-upgrades
enabled: true
state: started

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# {{ ansible_managed }}
APT::Periodic::Update-Package-Lists "1";
APT::Periodic::Unattended-Upgrade "1";
APT::Periodic::Download-Upgradeable-Packages "1";
APT::Periodic::AutocleanInterval "7";

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# {{ ansible_managed }}
Unattended-Upgrade::Origins-Pattern {
"origin=Debian,codename=${distro_codename}-updates";
// "origin=Debian,codename=${distro_codename}-proposed-updates";
"origin=Debian,codename=${distro_codename},label=Debian";
"origin=Debian,codename=${distro_codename},label=Debian-Security";
"origin=Debian,codename=${distro_codename}-security,label=Debian-Security";
};
Unattended-Upgrade::Remove-Unused-Kernel-Packages "true";
Unattended-Upgrade::Remove-New-Unused-Dependencies "true";
Unattended-Upgrade::Remove-Unused-Dependencies "true";

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---
- name: Set up VPS
hosts: all
gather_facts: true
vars_files:
- vars/secrets.yml
become: true
# ----------------------------------------------------------------------------------------------------
pre_tasks:
- name: Lock root password
user: name=root password='!'
- name: Set hostname
command: "hostnamectl set-hostname {{ inventory_hostname }}"
- name: Set timezone to Asia/Singapore
community.general.timezone:
name: {{ TZ }}
become: true
- name: Install packages
apt:
name:
- iputils-ping
- cron
- git
- curl
- trash-cli
state: latest
install_recommends: false
update_cache: true
autoclean: true
autoremove: true
# ----------------------------------------------------------------------------------------------------
roles:
- nfs
- chrony
- fail2ban
- unattended-upgrades
- docker
#- docker-buildx
- ssh
- ufw