Solution : https://service.sap.com/sap/support/notes/421359 (SAP Service marketplace login required)
Summary :
To effectively manage port binding below 1024 on UNIX systems, processes must possess superuser rights. Given the authorization scheme on UNIX, it's recommended that the ICM (Internet Communication Manager) or SAP Web Dispatcher employ the external program icmbnd for such tasks. This utility, once authorized with root privileges, can bind the necessary port and transfer the listening socket to the calling process. Ensure icmbnd has the correct permissions set (chown root:sapsys icmbnd and chmod 4750 icmbnd). When using ports for ICM or SAP Web Dispatcher, remember to enable the EXTBIND=1 option to prevent direct port binding by these services.
Key words :
-rwsr-x--- 1 root sapsys 1048044 mar 20 16, icm/sap web dispatcher, external bind program icmbnd, sap web dispatcher, permission denied reason, prerequisites authorization concept, standard authorization rights, <sid>adm user, current version information, external utility program
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