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SG security scan: port 80

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External Resources
SANS Internet Storm Center: port 80

Notes:
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 80.   User Reviews/Comments:     rate:  -- rating -- 5 - Excellent 4 - Good 3 - Average 2 - Poor 1 - Very Poor    avg: by Philip - 2009-02-26 07:37 List of other trojans/worms using port 80 (tcp): tcp Noob [trojan] Noob tcp Ramen [trojan] Ramen tcp ReverseWWWTunnel [trojan] Reverse WWW Tunnel Backdoor tcp RingZero [trojan] RingZero tcp RTB666 [trojan] RTB 666 tcp Seeker [trojan] Seeker tcp WANRemote [trojan] WAN Remote tcp WebDownloader [trojan] WebDownloader tcp WebServerCT [trojan] Web Server CT udp http World Wide Web HTTP tcp NCX [trojan] NCX tcp MTX [trojan] MTX tcp IISworm [trojan] IISworm tcp AckCmd [trojan] AckCmd tcp AckCmd [trojan] AckCmd tcp BackEnd [trojan] Back End tcp BO2000Plug-Ins [trojan] Back Orifice 2000 Plug-Ins tcp Cafeini [trojan] Cafeini tcp CGIBackdoor [trojan] CGI Backdoor tcp Executor [trojan] Executor tcp GodMessage4Creator [trojan] God Message 4 Creator tcp GodMessage [trojan] God Message tcp Hooker [trojan] Hooker tcp 711trojan [trojan] 711 trojan (Seven Eleven) by Matt Clairmont - 2014-02-06 14:33 Trojan.Cidox variants use 80/tcp. Look for session data containing GET /b/opt/ by Matt Clairmont - 2014-02-06 14:37 Adware.Win32.Hassar uses 80/tcp. Look for session data containing 'enc='. Hassar is an adware that installs a Backdoor onto the compromised workstation. by anonymous - 2014-08-28 23:35 Why does apple use the port 80 when it opens the back door and makes peoples idevices vulnerable? I scanned for open ports and what do you know it says port 80 is open and awaiting lookup. Also port 443 was awaiting lookup and port 1935 said unknown. So now I got spyware or a virus and hacker on my device. by anonymous - 2019-07-24 23:59 You really need to do some research and then you will not be surprised that 90% of the internet runs on ports 80 and 443. You would have no internet connection most likely if you block those and most definitely would not be visiting any web pages. by Philip - 2019-07-27 22:56 People would only need to access your computer on port 80 if your device is serving web pages. If you are not running a web server, there is no reason your computer should be listening on ports 80 or 443 for incoming connections. by anonymous - 2023-06-04 18:49 very good