Siemens SCALANCE W1750D UI Configuration Manual page 23

Secure/non-secure protocols
● 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.
● The following protocols provide secure alternatives:
– SNMPv1/v2 → SNMPv3
– HTTP → HTTPS
– Telnet → SSH
– SNTP → NTP
● 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.
SCALANCE W1750D UI
Configuration Manual, , C79000-G8976-C451-02
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.
Security recommendations
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