Azure SQL - The semaphore timeout period has expired.
Applies to: Azure SQL Database (PaaS)
Date created: April 11, 2021.
When using SSMS (SQL Server Management Studio) to connect to an Azure SQL
Database you keep getting error "The semaphore timeout period has expired."
You changed the connection time out to 60 seconds, but you keep getting the
What else you can do?
Do you use a VPN to get connected to your organization? Maybe the issue happens
only when you are connected or disconnected from the corporate VPN. You may be
able to see the error goes away when you are disconnected from the corporate VPN.
Please compare the network adapter settings in your computer with network
adapters of other computers in your organization. A driver update may have
The issue could also be related to a corporate firewall that may be blocking the
traffic. Please try to connect from another network entirely. Make sure port
TCP1433 is not blocked. If you are using Windows Firewall make sure you
configure it to allow SQL Server access as explained
Open SSMS, make a click on the "Options" button an specify a default database
other than the master database. Maybe the login does not have permissions to
access the master database.
Verify network latency in your network.