## 13.5.3.3.2  Communication Channel Security
SAP Portfolio and Project Management Communication Channel Security
| Communication Channel                                                                             | Communication Technology   | Data Transferred                                       | Comment/Security Recom- mendation                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
|---------------------------------------------------------------------------------------------------|----------------------------|--------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| SAP Portfolio and Project Management front-end (browser) to the Application Server ABAP (AS ABAP) | HTTP(S)                    | Files, metadata, and user data (passwords, user names) |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| Project Management front- end (browser) to content or cache servers                               | HTTP(S)                    | Files                                                  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| Application Server ABAP to content or cache servers                                               | HTTP(S)                    | Metadata, files                                        |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| Application Server ABAP to other application servers (for example, HR, CO)                        | RFC                        | Metadata, files                                        | SAP Portfolio and Project Management communicates with 3rd party or SAP S/ 4HANAsystems to obtain or create information on object links between SAP Portfolio and Project Management and objects located in the 3rd party/SAP system. The com- munication to 3rd party sys- tems has to be implemented at the customer site. The 3rd party/SAP system never calls back. For more information, see the Setting Up Object Links section of the Configuration Guide for SAP Portfolio and Project Management. |
| SAP Portfolio and Project Management to Project Sys- tem (PS) component on a separate system      | RFC                        | Files, metadata                                        |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| SAP Portfolio and Project ManagementtoSAPHCMon a separate system                                  | SAP ALE RFC                | Files, metadata                                        |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
##  Note
In SAP Portfolio and Project Management, there is no fixed port for communication and the firewall settings described in the Application Server ABAP Security Guide.
For more information, go to https:/ /help.sap.com/s4hana\_op\_2021, enter Security Aspects for the Change and Transport System into the search bar, press Enter , and open the search result with that title.
DIAG and RFC connections can be protected using Secure Network Communications (SNC). HTTP connections are protected using the Secure Sockets Layer (SSL) protocol.
##  Recommendation
We strongly recommend using secure protocols (SSL, SNC) whenever possible.
For more information, go to https:/ /help.sap.com/s4hana\_op\_2021, enter ABAP Platform Security Guide into the search bar, press Enter , open the search result with that title, and navigate to Network and Communication Security Transport Layer Security .