Port 991

Modified by:

Port 991 is used for Secure Telnet Protocol over TLS/SSL, which provides encrypted communication between the telnet client and server. It is primarily used for remote administration and maintenance of network devices and servers.

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 991
tcp
nas
Netnews Administration System
WELL KNOWN PORT
Port 991
udp
nas
Netnews Administration System
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 8014
Ports those registered with IANA are shown as official ports. The same port number
Port 7169
Port 7169 is commonly used for BMC Software Control-M/Server – Remote Manger communication. Ports
Port 7547
Port 7547 is used for remote management and configuration of ADSL modem routers. It
Port 1287
Ports those registered with IANA are shown as official ports. The same port number
Port 1689
Port 1689 is used for Microsoft Key Management Service (KMS) activation. KMS is a
Port 21846
Ports those registered with IANA are shown as official ports. The same port number
Port 2980
Ports those registered with IANA are shown as official ports. The same port number
Port 3702
Port 3702 is commonly used for the Simple Object Access Protocol (SOAP) discovery service
Port 1952
Ports those registered with IANA are shown as official ports. The same port number
Port 6051
Ports those registered with IANA are shown as official ports. The same port number
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