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Port 5631 Details

known port assignments and vulnerabilities
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Port(s) Protocol Service Details Source
5631 udp pc-anywhere PC-Anywhere sends UDP ping looking for a server on ports 22 and 5632. If it doesn't know the server address, it will ping the entire subnet to find one !.

If you're running PC-Anywhere, make sure that you assign exact IP addresses of the systems that will be using it in the configuration, to avoid PC-Anywhere scanning an entire IP range looking for "your target system" and essentially advertising the service to every potential intruder in your IP block.

Symantec pcAnywhere 8.0 allows remote attackers to cause a denial of service (CPU utilization) via a large amount of data to port 5631.
References: [CVE-1999-1028]

IANA registered for: pcANYWHEREdata (TCP/UDP)
5631 tcp applications The awhost32 service in Symantec pcAnywhere through 12.5.3, Altiris IT Management Suite pcAnywhere Solution 7.0 (aka 12.5.x) and 7.1 (aka 12.6.x), Altiris Client Management Suite pcAnywhere Solution 7.0 (aka 12.5.x) and 7.1 (aka 12.6.x), and Altiris Deployment Solution Remote pcAnywhere Solution 7.1 (aka 12.5.x and 12.6.x) allows remote attackers to cause a denial of service (daemon crash) via a crafted TCP session on port 5631.
References: [CVE-2012-0292] [BID-52094]

The host-services component in Symantec pcAnywhere 12.5.x through 12.5.3, and IT Management Suite pcAnywhere Solution 7.0 (aka 12.5.x) and 7.1 (aka 12.6.x), does not properly filter login and authentication data, which allows remote attackers to execute arbitrary code via a crafted session on TCP port 5631.
References: [CVE-2011-3478] [BID-51592]
5631 tcp pcANYWHEREdata, Symantec pcAnywhere (version 7.52 and later) data (official) Wikipedia
5631 tcp pcanywheredata SANS
5631 udp pcanywheredata pcANYWHEREdata SANS
5631 tcp applications pcAnywhere Portforward
5631 tcp pcanywheredata pcanywheredata Nmap
5631 tcp,udp pcanywheredata pcANYWHEREdata IANA
5500-5699 tcp applications MOHAA Reverend Portforward
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Related ports: 5632  

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External Resources
SANS Internet Storm Center: port 5631

Port numbers in computer networking represent communication endpoints. Ports are unsigned 16-bit integers (0-65535) that identify a specific process, or network service. IANA is responsible for internet protocol resources, including the registration of commonly used port numbers for well-known internet services.
Well Known Ports: 0 through 1023.
Registered Ports: 1024 through 49151.
Dynamic/Private : 49152 through 65535.

TCP ports use the Transmission Control Protocol, the most commonly used protocol on the Internet and any TCP/IP network. 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. Like TCP, UDP is used in combination with IP (the Internet Protocol) and facilitates 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 and realtime gaming, 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 5631.
  User Reviews/Comments:
by anonymous - 2011-04-15 14:52
Your information about port 5631 is incomplete. Port 5631 is an IANA registered port by Symantec for pcAnywhere.

pcAnywhere uses port 5631 for TCP communication to provide the remote control functionality. This is NOT the port that does the network scan for hosts as the information you have states or use the UDP protocol.

The other IANA registered port pcAnywhere uses is port 5632. This port uses the UDP protocol for host status messaging, ie waiting, busy, and IS used to do network scanning for waiting hosts, but only on the port that pcAnywhere is configured to use, default 5632. The ports are user configurable however.
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