Port 1434 — MS SQL Browser
Quick reference for TCP/UDP port 1434, used by MS SQL Browser. Includes what the service does, security guidance and related ports.
What is port 1434?
SQL Server browser service.
What port does MS SQL Browser use?
MS SQL Browser listens on port 1434 by default.
Security guidance
High risk — do not expose to the internet
Port 1434 (MS SQL Browser) is high-risk because the service it carries is a frequent target for credential attacks, brute force or unpatched-vulnerability scanning. Keep it bound to localhost or your VPN, never forward it directly on a router, and require strong authentication.
Related ports
Frequently asked
What is port 1434 used for?+
Port 1434 is the standard TCP/UDP port for MS SQL Browser. SQL Server browser service.
What port does MS SQL Browser use?+
MS SQL Browser listens on port 1434 by default.
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