161
SNMP
High RiskUDP — System & Infrastructure
Port Overview
Port Number
161
Service Name
SNMP
Transport Protocol
UDP
Category
System & Infrastructure
Security Risk
High
Port Range
Well-Known (0-1023)
What is Port 161?
Simple Network Management Protocol. Monitors and manages network devices such as routers, switches, and servers. Uses community strings for authentication in v1/v2c.
UDP
System & Infrastructure
Commonly Used
Security Considerations
Port 161 (SNMP) is classified as high risk. This port is a common target for automated scanning and brute-force attacks. If you must expose it, restrict access to known IP addresses.
Recommendation: Use firewall rules to whitelist trusted IPs. Enable rate limiting and intrusion detection.