Siemens SCALANCE M800 - Page 13

Security recommendations
SCALANCE M874, M876
Operating Instructions, 08/2018, C79000-G8976-C331-08
13
Protocol
Protocol/port
number
Port status
Default port status
Authentication
Encryption
Local access
External
access
TFTP
UDP/69 Open
(only outgoing)
Closed Closed No No
DynDNS
TCP/80 Open
(only outgoing)
Closed Closed No No
Telnet
TCP/23 Open
(when configured)
Open Closed Yes No
Ping
ICMP
Open
Open
Closed
No
No
RADIUS client
UDP/1812
UDP/1813
Open
(when configured)
Closed Closed No No
TIA Portal Cloud
Connector
1)
TCP/9023
(variable)
Open
(when configured)
Open Closed No No
SMTP
TCP/25 Open
(only outgoing)
Closed Closed No No
HTTP proxy
TCP/variable Open
(only outgoing)
Closed Closed No No
1)
Only with SCALANCE M804PB