Online Security Diagnostics Via Port 8448; The Cp As Web Server - Siemens S7-400 Equipment Manual

Diagnostics and upkeep

7.2 The CP as Web server

Using the CP as an intermediary for diagnostics data
If you only want to use the CP as an intermediary for diagnostics data of the station, as of
firmware version 3.2 you can network only the gigabit interface and, for example, establish a
VPN tunnel to a PC via this interface. The PROFINET interface does not need to be networked.
7.1.2

Online security diagnostics via port 8448

Security diagnostics via port 8448
Requirements:
• With an activated firewall, access must be enabled.
If you want to perform security diagnostics in STEP 7 Professional, follow the steps below:
1. Select the CP in STEP 7.
2. Open the "Online & Diagnostics" shortcut menu.
3. In the "Security" parameter group, click the "Connect online" button.
In this way, you perform the security diagnostics via port 8448.
For more information, refer to section Settings for online security diagnostics and
downloading to station with the firewall activated (Page 71).
7.2 The CP as Web server
The CP provides you with the functionality of a Web server for access by means of a Web
browser.
Note
Please note the following special features when using IT functions:
The data exchange for productive communication (S7 connections + SEND/RECEIVE
connections + PROFINET IO) always has a higher priority than data exchange with the Web
browser. This can lead to delays in the HTML process control in the Web browser.
Web diagnostics
The CP also provides HTML pages for Web diagnostics. HTML pages are used to transfer and
display information in a Web browser. These, for example, contain diagnostics information.
With the following address, you have access to Web diagnostics:
http://<IP address of the CP>/diag
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Equipment Manual, 03/2023, C79000-G8976-C256-07
CP 443-1 Advanced