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IPFYI
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191

Prospero

Low Risk

TCP/UDP — File Transfer

Port Overview

Port Number 191
Service Name Prospero
Transport Protocol TCP/UDP
Category File Transfer
Security Risk Low
Port Range Well-Known (0-1023)

What is Port 191?

The Prospero Directory Service was a distributed filesystem and resource location protocol from the early 1990s. Completely obsolete.

TCP/UDP File Transfer

Security Considerations

Port 191 (Prospero) is classified as low risk. This service uses encryption or has a minimal attack surface, making it relatively safe to expose.

Recommendation: Standard security practices apply. Keep software updated and monitor access.

Related Ports — File Transfer

20 FTP Data 21 FTP Control 69 TFTP 82 XFER Utility 115 SFTP (Simple FTP) 117 UUCP Path 139 NetBIOS Session 152 BFTP
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