:1434
(UDP)
High Risk
MS SQL Browser
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UDP — Database
Port Overview
Port Number
1434
Service Name
MS SQL Browser
Transport Protocol
UDP
Category
Database
Security Risk
High
Port Range
Registered (1024-49151)
What is Port 1434?
Microsoft SQL Server Browser Service. Provides instance discovery and connection information for named SQL Server instances on a host.
UDP
Database
Security Considerations
Port 1434 (MS SQL Browser) 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.