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IPFYI
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639

MSDP

Medium Risk

TCP — Other

Port Overview

Port Number 639
Service Name MSDP
Transport Protocol TCP
Category Other
Security Risk Medium
Port Range Well-Known (0-1023)

What is Port 639?

Multicast Source Discovery Protocol (MSDP), defined in RFC 3618, used by PIM-SM to share active multicast source information between Rendezvous Points across different PIM domains.

TCP Other

Security Considerations

Port 639 (MSDP) is classified as medium risk. While this service is commonly exposed, consider using encrypted alternatives where available.

Recommendation: Keep the service updated. Monitor logs for unusual activity.

Related Ports — Other

43 WHOIS 63 Whois++ 104 DICOM 105 CCSO Nameserver 170 Network PostScript 200 IMPLink 201 AppleTalk 213 IPX
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