Siemens S7-1500 Operating Instructions Manual page 33

Table: Meaning of the column titles and entries
The following table provides 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
– Open (login, when configured)
– Open with block call
● Authentication
Specifies whether or not the protocol authenticates the communications partner during
access.
Protocol / Port number (pro-
function tocol)
DHCP 68 (UDP)
DCP 93 (UDP)
DCE 135 (TCP)
S7 communica- 102 (TCP)
tion
Online security 8448 (TCP)
diagnostics
NTP 123 (UDP)
HTTP 80 (TCP)
HTTPS 443 (TCP)
CP 1543-1
Operating Instructions, 05/2017, C79000-G8976-C289-07
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.
As default the port is open. After configuring the port, the communications partner
needs to log in.
The port is only opened when a suitable program block is called.
Default of the port
Open
Open
Open
Open
Closed
Closed
Closed
Closed
Port status
Open after configuration (only
outgoing)
Open
Open
Open
Open after configuration
Open after configuration (only
outgoing)
Open after configuration
Open after configuration
Configuration, programming
4.1 Security recommendations
Authentication
No
No
Yes, when security is
enabled.
No
No
No
Yes
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