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Port 8899 Details

known port assignments and vulnerabilities
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Port(s) Protocol Service Details Source
8899 tcp qnap QNAP NAS - Real-time Remote Replication Server (RTRR Server) runs a service on port 8899 by default. QNAP NAS uses the following ports:
Web server: 80,8081 TCP and 443,8080 TCP (web admin)
FTP/SFTP/SSH: 20,21,22 TCP and 13131 TCP (telnet)
Remote Replication: 873,8899 TCP
VPN server: 1723 TCP (PPTP), 1194 UDP (OpenVPN)
CloudLink: port 20001 UDP (optional, only required for access without manual port forwarding)

An unspecified vulnerability allows sending crafted client requests to OracleVM ovs-agent over 8899/TCP that could result in command injection with root privileges on the system.
References: [XFDB-62482]

Malware that uses this port: Last trojan
IANA registered for: ospf-lite
8899 tcp,udp ospf-lite ospf-lite IANA
2 records found
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Related ports: 873  1194  8081  13131  20001  

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External Resources
SANS Internet Storm Center: port 8899

Well Known Ports: 0 through 1023.
Registered Ports: 1024 through 49151.
Dynamic/Private : 49152 through 65535.

TCP ports use the Transmission Control Protocol. TCP is the most commonly used protocol on the Internet and any TCP/IP network. Whereas the IP protocol deals only with packets, TCP enables two hosts to establish a connection and exchange streams of data. TCP guarantees delivery of data and that packets will be delivered in the same order in which they were sent. Guaranteed communication/delivery is the key difference between TCP and UDP.

UDP ports use the Datagram Protocol, a communications protocol for the Internet network, transport, and session layers. Like TCP (Transmission Control Protocol), UDP is used with IP (the Internet Protocol) and makes possible the transmission of datagrams from one computer to applications on another computer, but unlike TCP, UDP is connectionless and does not guarantee reliable communication; it's up to the application that received the message to process any errors and verify correct delivery. UDP is often used with time-sensitive applications, such as audio/video streaming, where dropping some packets is preferable to waiting for delayed data.

When troubleshooting unknown open ports, it is useful to find exactly what services/processes are listening to them. This can be accomplished in both Windows command prompt and Linux variants using the "netstat -aon" command. We also recommend runnig multiple anti-virus/anti-malware scans to rule out the possibility of active malicious software. For more detailed and personalized help please use our forums.

Please use the "Add Comment" button below to provide additional information or comments about port 8899.
  User Reviews/Comments:
by anonymous - 2015-05-02 02:36
Qnap Real-time Remote Replication uses port 8899 by default
by Philip - 2015-05-02 09:11
Thanks, confirmed and added to the db.
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