**Preparing the Machines**

**Debian Machines (Medulla Main and Medulla Relay)**

- Ensure that netcat is installed on the Debian machines: - ``` sudo apt update && sudo apt install netcat-openbsd ```

**Windows Machine (Client Workstation)**

- Make sure PowerShell is configured to run scripts: - ``` Set-ExecutionPolicy RemoteSigned -Scope CurrentUser ``` - Answer \[A\] "Yes to all"

**Listening Scripts**

**On Debian Machines (Medulla Main and Medulla Relay)**

Use the listen_ports_debian.sh script to listen on the necessary ports.

**Steps:**

1. **Download the**listen\_ports\_debian.sh**script**to the machine. 2. **Make it executable (**and convert to Unix if necessary):

``` chmod +x listen_ports_debian.sh dos2unix listen_ports_debian.sh ```

1. **Run the script**: - For**Medulla Main**: - ``` ./listen_ports_debian.sh --medulla ``` - For**Medulla Relay**: - ``` ./listen_ports_debian.sh --relay ```

**On the Windows Machine (Client)**

Use the listen_ports_windows.ps1 script to listen on the necessary ports.

**Steps:**

1. **Download the**listen\_ports\_windows.ps1**script**to the machine. 2. **Run the script**:

``` .\listen_ports_windows.ps1 ```

**Connection Test Scripts**

**On Debian Machines (Medulla Main, Medulla Relay, and Client Station)**

Use the medulla_connection_check.sh, medulla_relay_connection_check.sh, and windows_connection_check.ps1 scripts to test connections to the machines.

**Steps:**

1. **Download the scripts**to the three machines (Medulla Main, Relay, and Client Workstation). 2. **Make them executable**: 3. ``` chmod +x medulla_connection_check.sh chmod +x medulla_relay_connection_check.sh chmod +x listen_ports_debian.sh ``` 4. If necessary (error when running the Debian scripts), convert them to Unix: 5. ``` dos2unix medulla_connection_check.sh dos2unix medulla_relay_connection_check.sh dos2unix listen_ports_debian.sh ``` 6. **Run the script**: - To test connections from**Medulla Main**to the Medulla Relay: - ``` ./medulla_connection_check.sh --relay ``` - To test connections from**Medulla Main**to a Client Workstation: - ``` ./medulla_connection_check.sh --client ``` - To test connections from**Medulla Relay**to Medulla Main: - ``` ./medulla_relay_connection_check.sh --medulla ``` - To test connections from**Medulla Relay**to a Client Workstation: - ``` ./medulla_relay_connection_check.sh --client ``` - To test connections from**a Client Station to**Medulla Main and Medulla Relay: - ``` .\windows_connection_check.ps1 -Target -Mode pulse .\windows_connection_check.ps1 -Target -Mode relay ```

**Complete Procedure**

**Port Listening**

**On Medulla Main (Debian)**: ``` ./listen_port_debian.sh --medulla ``` **On Medulla Relay (Debian)**: ``` ./listen_port_debian.sh --relay ``` **On Client Workstation (Windows)**: ``` .\listen_ports_windows.ps1 ```

**Connection Test From Medulla Main (Debian)**:

``` ./medulla_connection_check.sh --relay ./medulla_connection_check.sh --client ```

**From Medulla Relay (Debian)**:

``` ./medulla_relay_connection_check.sh --medulla ./medulla_relay_connection_check.sh --client ```

**From the Client Workstation (Windows):**

``` .\windows_connection_check.ps1 -Target -Mode pulse .\windows_connection_check.ps1 -Target -Mode relay ```

**Troubleshooting**

**Connection Issues**

- **Check IP addresses**: Make sure the IP addresses used are correct. - **Check firewalls**: Make sure that the firewalls on the machines allow connections on the necessary ports. - **Check services**: Make sure the necessary services are running.

**Listening Issues**

- **Check listening ports**: Use `netstat -ano` on Windows or `ss -tulnp` on Debian to verify that the ports are listening. - **Check for errors**: Review the error messages in the scripts to identify any issues.

Prerequisites – Server Sizing
Main Server	OS	Debian 12.x
	Architecture	x86-64
	CPU	8 cores
	RAM	8 GB
	Partition /	20 GB in EXT4
	/var partition	400 GB minimum in XFS or mount point on a storage array
Multi-site relay servers (if applicable)	OS	Debian 12.x
	Architecture	x86-64
	CPU	4 cores
	RAM	8 GB
	Partition /	20 GB in EXT4
	/var partition	At least 400 GB in XFS or mount point on a storage array