TCP Port 989 – ftps-data

About TCP Port 989

Port 989 carries the IANA assignment for ftps-data. The IANA description reads: ‘ftp protocol, data, over TLS/SSL’. This port appears in 5 IDS rules and does not have notable malware activity indicators in our data.

IDS Rule References

5 IDS / security rules reference TCP port 989. Treat that number as context, not a danger score. Many detection rules are written against groups of ports rather than one service, web ports especially, so common web alternate ports inherit large counts while genuinely sensitive services can show few rules or none. Presence in IDS rules does not mean traffic on this port is malicious.

Rule categories (top 1): bad-unknown (5).

Sample rule descriptions for TCP port 989:

• ET EXPLOIT Possible OpenSSL HeartBleed Large HeartBeat Response from Common SSL Port (Outbound from Server)
• ET EXPLOIT Possible OpenSSL HeartBleed Large HeartBeat Response from Common SSL Port (Outbound from Client)
• ET EXPLOIT Possible TLS HeartBleed Unencrypted Request Method 4 (Inbound to Common SSL Port)
• ET EXPLOIT Possible TLS HeartBleed Unencrypted Request Method 3 (Inbound to Common SSL Port)
• ET EXPLOIT FREAK Weak Export Suite From Server (CVE-2015-0204)

Data Sources

This information is compiled from: IANA Service Name and Transport Protocol Port Number Registry and Emerging Threats Open Ruleset (BSD 2-Clause / GPLv2 per SID range).