Siemens SIMATIC NET SCALANCE W778-1 Operating Instructions Manual page 11

Secure/non-secure protocols and services
● Avoid and disable non-secure protocols, for example Telnet and TFTP. For historical
reasons, these protocols are still available, however not intended for secure applications.
Use non-secure protocols on the device with caution.
● Check whether use of the following protocols and services is necessary:
– Non-authenticated and unencrypted ports
– LLDP
– Syslog
– DHCP options 66/67
– TFTP
● The following protocols provide secure alternatives:
– SNMPv1/v2 → SNMPv3
– HTTP → HTTPS
– Telnet → SSH
● Use secure protocols when access to the device is not prevented by physical protection
measures.
● To prevent unauthorized access to the device or network, take suitable protective
measures against non-secure protocols.
● If you require non-secure protocols and services, operate the device only within a
protected network area.
● Restrict the services and protocols available to the outside to a minimum.
● For the DCP function, enable the "Read Only" mode after commissioning.
Available protocols per port
The following list provides you with an overview of the open ports on this device.
The table includes the following columns:
● Protocol
All protocols that the device supports
● Port number
Port number assigned to the protocol
SCALANCE W778-1 /W738-1
Operating Instructions, 07/2019, C79000-G8976-C450-04
Check whether use of SNMPv1 is necessary. SNMPv1 is classified as non-secure.
Use the option of preventing write access. The product provides you with suitable
setting options.
If SNMP is enabled, change the community names. If no unrestricted access is
necessary, restrict access with SNMP.
Use SNMPv3 in conjunction with passwords.
Safety notices
2.1 Security recommendations
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