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Port 7100 Details

known port assignments and vulnerabilities
threat/application/port search:
Port(s) Protocol Service Details Source
7100 tcp,udp font-service Buffer overflow in Dispatch() routine for XFS font server ( on Solaris 2.5.1 through 9 allows remote attackers to cause a denial of service (crash) or execute arbitrary code via a certain XFS query.
References: [CVE-2002-1317] [BID-6241]

An issue was discovered on Barco ClickShare CSE-200 and CS-100 Base Units with firmware before Sending an arbitrary unexpected string to TCP port 7100 respecting a certain frequency timing disconnects all clients and results in a crash of the Unit.
References: [CVE-2018-10943]

Barco ClickShare is vulnerable to a denial of service. By sending a specially crafted string to TCP port 7100, a remote attacker could exploit this vulnerability to cause the application to crash.
References: [XFDB-141734]

X Font Service (IANA official)
UDP port range is also used by RealAudio and some games: Active Worlds, City of Heroes, City of Villains
3000,5670,7777,7000-7100 tcp applications Active Worlds Portforward
7000-7100 udp applications City of Heroes Portforward
7000-7100 udp applications City of Villains Portforward
7100 tcp,udp font-service X Font Service IANA
6970-7170 udp applications RealAudio Portforward
6 records found
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External Resources
SANS Internet Storm Center: port 7100

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.

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