Siemens Simatic RTU303xC Series Operating Instructions Manual page 90

Configuration (WBM)
4.1 Security recommendations
Passwords
● Define rules for the use of devices and assignment of passwords.
● Regularly update the passwords to increase security.
● Only use passwords with a high password strength. Avoid weak passwords for example
"password1", "123456789" or similar.
● Make sure that all passwords are protected and inaccessible to unauthorized personnel.
● Do not use one password for different users and systems.
Protocols
Secure and non-secure protocols
● Only activate protocols that you require to use the system.
● Use secure protocols when access to the device is not prevented by physical protection
measures.
The HTTP protocol provides a secure alternative with HTTPS.
Port tables
The following tables provide you with an overview of the open ports on this device.
● Protocol / function
Protocols that the device supports.
● Port number (protocol)
Port number assigned to the protocol.
● Default of the port
– Open
– Closed
● Port status
– Open
– Open after configuration
● Authentication
Specifies whether or not the protocol authenticates the communications partner during
access.
90
The port is open at the start of the configuration.
The port is closed at the start of the configuration.
The port is always open and cannot be closed.
The port is open if it has been configured.
Operating Instructions, 06/2019, C79000-G8976-C382-06
RTU303xC