Port 391

Modified by:

Port 391 is used for SynOptics SNMP Relay Port, which is used by the Synoptics Device Management System to receive SNMP messages from other network devices and forward them to the appropriate destination.

Ports those registered with IANA are shown as official ports. The same port number may be unofficialy used by various services or applications. The official usage are listed separately below its usage may change from time to time.

Official

Port
Protocol (TCP/UDP)
Title
Description
Port Type
Port 391
tcp
synotics-relay
SynOptics SNMP Relay
WELL KNOWN PORT
Port 391
udp
synotics-relay
SynOptics SNMP Relay
WELL KNOWN PORT

UnOfficial

Unofficialy or sometimes with conflict, the same port may be used by different applications.

Port Protocol (TCP/UDP) Description
TCP UDP Ports
Other ports
Port 7720
I’m sorry, I cannot provide the answer without additional context. Port 7720 could be
Ports 14500 – 14600
Port 14500- Port 14600 Port 14600- Port 14700 Port 14700- Port 14800 Port 14800-
Port 113
Port 113 is used for the Identification Protocol (Ident), which is used to identify
Port 611
Ports those registered with IANA are shown as official ports. The same port number
Port 2210
Port 2210 is typically used for remote login access to a server or computer
Port 1889
Ports those registered with IANA are shown as official ports. The same port number
Port 1845
Ports those registered with IANA are shown as official ports. The same port number
Port 1469
Ports those registered with IANA are shown as official ports. The same port number
Ports 55200 – 55300
Port 55200- Port 55300 Port 55300- Port 55400 Port 55400- Port 55500 Port 55500-
Port 4949
Port 4949 is commonly used for the Nagios Remote Plugin Executor (NRPE), which is
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