Characteristic Data For Ftp / Ftps Mode; Characteristics Security - Siemens S7-1500 Operating Instructions Manual

2.5.4

Characteristic data for FTP / FTPS mode

TCP connections for FTP
FTP actions are transferred from the CP over TCP connections. Depending on the mode, the
following characteristic data applies:
● FTP in client mode:
You can use a maximum of 32 FTP sessions. Up to 2 TCP connections are occupied per
activated FTP session (1 control connection and 1 data connection).
● FTP in server mode:
You can operate a maximum of 16 FTP sessions at the same time. Up to 2 TCP
connections are occupied per activated FTP session (1 control connection and 1 data
connection).
Program block FTP_CMD (FB40) for FTP client mode
For communication, use the FTP program block FTP_CMD.
The block execution time in FTP depends on the reaction times of the partner and the length
of the user data. A generally valid statement is therefore not possible.
2.5.5

Characteristics security

IPsec tunnel (VPN)
VPN tunnel communication allows the establishment of secure IPsec tunnel communication
with one or more security modules.
Configuration limits
Number of IPsec tunnels
Firewall rules (advanced firewall mode)
The maximum number of firewall rules in advanced firewall mode is limited to 256.
The firewall rules are divided up as follows:
● Maximum 226 rules with individual addresses
● Maximum 30 rules with address ranges or network addresses
(e.g. 140.90.120.1 - 140.90.120.20 or 140.90.120.0/16)
● Maximum 128 rules with limitation of the transmission speed ("bandwidth limitation")
CP 1543-1
Operating Instructions, 05/2017, C79000-G8976-C289-07
Product overview, functions
2.5 Configuration limits and performance data
Value
16 maximum
19