Port 1434 · SQL Server Browser

Port 1434 is SQL Server Browser, UDP.

SQL Server Browser — responds to client requests for the dynamic port of a named SQL instance.

Palo Alto

Create the service object for this port, then allow the App-ID on it. Restricting the rule to the port's service object keeps the rule working on a non-default port and stops the App-ID matching on other ports. Replace the placeholders with your own rule name and zones.

set service udp-1434 protocol udp port 1434

set rulebase security rules <rule-name> from <from-zone> to <to-zone> source any destination any application mssql-db service udp-1434 action allow

Risk and exposure

Rated medium risk. Restrict this port to the sources that need it and keep the service patched; avoid exposing it to the whole internet unless the service is meant to be public.

Check it

• Linux ss -ulnp | grep :1434
• nmap nmap -sU -p 1434 <host>

Related ports

• 1433 Microsoft SQL Server
• 80 HTTP
• 443 HTTPS

← Search all ports