SNMP Proxy

This SNMP Proxy listens for SNMPv3 requests and either responds with locally handled OIDs or proxies the request to a target SNMP device.

Requirements

• Python 3.6+ (3.11 preferred)
• pysnmp library
• pyasn1 library

Does not work with python >= 3.12 due to incompatibility with pysnmp library.

Installation

1. Clone the repository:

   git clone https://github.com/koenhandekyn/snmpproxy.git
   cd snmpproxy

2. Create a virtual environment and activate it:

   python3 -m venv venv
   source venv/bin/activate  # On Windows use `venv\Scripts\activate`

3. Install the required packages:

   pip install -r requirements.txt

Running the SNMP Proxy

1. Ensure the snmpproxy.py script is executable:

   chmod +x snmpproxy.py

2. Run the SNMP proxy:

   python snmpproxy.py

The SNMP Proxy will start listening on UDP port 161 for SNMPv3 requests.

Configuration

• SNMPv3 credentials and target device settings can be modified in the snmpproxy.py file.
• Local OID mappings are defined in the LOCAL_OIDS dictionary within the snmpproxy.py file.

Logging

Logs are written to snmp_proxy.log in the same directory as the script.

Stopping the SNMP Proxy

To stop the SNMP Proxy, press Ctrl+C in the terminal where the proxy is running.

Test

sudo python snmpproxy.py

client (1)

sudo python snmpclient.py

client (2)

 snmpget -v3 -l authPriv -u proxyUser -a SHA -A "authPassword123" -x AES -X "privPassword123" localhost 1.3.6.1.4.1.6302.2.1.2.28.6.0