Below list the most important ports used by the AS ABAP itself.
Dispatcher
Port /Service Name: 32<instance-number> / sapdp<instance-number>
Default: 3200
Range: 3200-3299, sapdp00-sapdp99
Gateway
Port /Service Name: 33<instance-number>, sapgw<instance-number>
Default: 3300
Range: 3300-3399, sapgw00-sapgw99
Internet Communication Manager (ICM), HTTP
Port /Service Name: 80<instance-number>
Default: 8000
Range: Free
ICM HTTPS
Port /Service Name: 443<instance-number> (convention for multiple instances)
Default: Not active
Range: Free
ICM SMTP
Port /Service Name: 25
Default: Not active
Range: 25 (no other port generally supported by SMTP)
Message Server
Port /Service Name: 36<instance-number>, sapms<instance-number>
Default: 3600, sapmsC11
Range: Free, sapms<any SID>
Message Server HTTP
Port /Service Name: 81<instance-number>
Default:8100
Range: Free
Message Server HTTPS
Port /Service Name: 444<instance-number> (convention for multiple instances)
Default: Not active
Range: Free
The following ports are used internally on the SAP Web AS ABAP.
Dispatcher
Port /Service Name: 32<instance-number>/UDP
Default: 3200/UDP
Range: 3200-3299/UDP
Gateway
Port /Service Name: 33<instance-number>/UPD
Default: 3300/UDP
Range: 3300-3399/UDP
ICM Admin
Port /Service Name: detected automatically
Default: 65000 or next free lower port
Range: 65000 or less
Note:
The dispatcher and gateway ports for UDP are only used on the local host for signaling the dispatcher. They are not seen on the network. The ICM Admin port is only used for internal communication. This port only accepts connections from the local host.
