---
type: SNMP Concept
title: "SNMP Ports: 161 & 162 (UDP) Explained"
description: "UDP 161 for agent queries, UDP 162 for traps; TLS/DTLS 10161/10162; firewall guidance."
resource: "https://snmp-monitoring.info/what-is-snmp/ports/"
tags: [what-is-snmp]
timestamp: 2026-07-10T00:00:00Z
---

# SNMP Ports: 161 & 162 (UDP) Explained

UDP 161 for agent queries, UDP 162 for traps; TLS/DTLS 10161/10162; firewall guidance.

## Related concepts

- Up: [What Is SNMP? Simple Network Management Protocol Explained](/what-is-snmp/index.md)

## Frequently asked questions

### What port does SNMP use?

UDP 161 for agent queries; UDP 162 for traps/informs to the manager. Secure-transport deployments may use 10161/10162 (TLS/DTLS).

### Is SNMP TCP or UDP?

Normally UDP. TCP and TLS/DTLS variants exist but are far less common than classic UDP 161/162.

### What is port 162 used for?

Traps and informs—asynchronous notifications from the agent to a trap receiver on the manager side. Not for routine Get requests.

### Can I change the SNMP port?

Yes, if agent and managers agree. See setup/port. Update firewalls and every poller config or you'll create a silent outage.

## Source

Concept generated from https://snmp-monitoring.info/what-is-snmp/ports/ — the SNMP Monitoring vendor-neutral knowledge base. Content is limited to what that page states (no external claims added here).