In the world of technology, software’s play a crucial role. It is the effectiveness of the software that enables the success and failure of a project. The SQL server has evolved from a simple database engine to a multi-purpose enterprise level data platform. The SQL server has significantly increased the network connections that the platform uses. Sometimes it becomes a tricky affair to judge which firewall ports to open for every SQL server. While using of desktop or laptops, one can now configure the Operating System firewall with the SQL firewall. This can be a crucial part of the OS level security.
If one is not using any firewall hardware or software, then the system might be exposed to risk. One can always enable the OS firewall for the SQL database server. Initially the OS firewall was also referred as Internet connection firewall. It falls into the category of software firewalls and is primly used to block or filter specific traffic towards the system. The OS firewall can be assessed from the control panel or also can be assessed through the run command box. Once you enter the windows configuration frame, , you can turn on or off the firewall along with adding certain changes in the settings.
The SQL server firewall can be related to an instance level and is specific for that instance. The server ports are used when an instance is configured in order to use the TCP/IP protocol. Firewall systems help to prevent unauthorized access to computer resources. If the firewall is turned on and is not correctly configured, attempts for connecting to the SQL server might be blocked. To access an instance through the firewall, one must configure the firewall on the computer that is running SQL server to allow the access. One can also install firewall from another company.
Firewalls work by inspecting incoming packets and comparing them against a set of rules. If the rules allow the packet, the firewall passes the packet to the TCP IP protocol for additional processing. When the computer that has the firewall enabled initiates communication, the firewall creates an entry in the list so that the response is allowed. The incoming response is considered to be solicited traffic and one need not to configure this. Choosing a firewall strategy is much more complex than just deciding if a given port should be open or closed.