# SNMPD Custom OID Docker Container

This Docker container runs `snmpd` with a custom script that provides a specific OID (`.1.3.6.1.4.1.38446.1.2.4.1.9.1`). The value of this OID increases randomly by a small amount every 4 minutes.

## Features

- Lightweight Docker container based on Alpine Linux.
- Custom Python script to generate and update the OID value.
- Configurable SNMP daemon (`snmpd`) to use the custom script.

## Requirements

- Docker installed on your system.
- Basic knowledge of Docker commands.

## Dependencies

- `snmpd`: The SNMP daemon.
- Python 3: Used to write the custom script.
- `random`: Python library for generating random numbers.

## How to Use

### Step 1: Build the Docker Image

Navigate to the directory containing the `Dockerfile` and `custom_snmp_script.py`, then run:

```bash
docker build -t snmpd-custom .
```

### Step 2: Run the Docker Container

Start the Docker container with the following command:

```bash
docker run -d -p 161:161/udp --name snmpd-custom-container snmpd-custom
```

### Step 3: Verify the Setup

You can verify that the container is running and the SNMP daemon is providing the custom OID by using an SNMP client to query the OID:

```bash
snmpwalk -v 2c -c public localhost .1.3.6.1.4.1.38446.1.2.4.1.9.1
```

You should see the value incrementing randomly every 4 minutes.

## Customization

- **Initial Value**: You can change the initial value in the `custom_snmp_script.py` file.
- **Increment Range**: Modify the range in the script to change how much the value increments.
- **Update Interval**: Adjust the sleep interval in the script to change the frequency of updates.

## Notes

- Ensure that the SNMP community string (`public` in the example) matches your configuration.
- The container exposes port 161 for SNMP communication.

## License

This project is licensed under the MIT License.