Commonly Open Ports. This is a list of the most commonly open TCP/UDP ports as reported by our Security Scan.For a full list of known ports and vulnerabilities, please see the SG Ports Database.Visit our Security Forum with any questions you might have.

TCP/UDP. Port Number. Description. File Transfer Protocol (FTP) (RFC 959) TCP. 20/21. FTP is one of the most commonly used file transfer protocols on the Internet and within private networks. An FTP server can easily be set up with little networking knowledge and provides the ability to easily relocate files from one system to another. Overview of common TCP and UDP default ports. TCP is the abbreviation of "Transfer Control Protocol" whereas UDP is the abbreviation of "User Datagram Protocol". TCP and UDP are both the main protocols which are used during the Transport layer of a TCP/IP Model. Both of these protocols are involved in the process of transmission of data. The most commonly used ports are the TCP/IP ports, which are used for communication over the Internet. There are many other ports. However, only the common and most used ones are explained in this article. This is a list of the "commonly" used TCP and UDP ports. This list is not an exhaustive list, but rather a list of ports you will need to know for the COMPTIA Network+ certification. Nov 02, 2017 · Port numbers 0 to 1024 are reserved for privileged services and designated as well-known ports. This list of port numbers are specified in RFC 1700. In TCP/IP and UDP networks, a port is an endpoint to a logical connection and the way a client program specifies a specific server program on a computer in a network.

The following table lists the most common TCP and UDP ports needed for various functions on Moxa's serial-to-Ethernet device servers: DE-311/211/30x/33x Series Device Servers Protocol

The next column lists each port used by the product, including any port ranges. The third column shows which protocol the ports refer to (TCP, UDP or both). Finally, a description of the application protocol is provided where appropriate. The following two lists provide the top TCP and UDP ports as determined by our empirical scan data. The listed service is the one found in our nmap-services file. We try to list the most common service for each port there, though of course it is possible for a port to be used for different things.

Common ports, such as TCP port 80 (HTTP), may be locked down — but other ports may get overlooked and be vulnerable to hackers. In your security tests, be sure to check these commonly hacked TCP and UDP ports: TCP port 21 — FTP (File Transfer Protocol) TCP port 22 — SSH (Secure Shell) TCP […]

Jul 20, 2020 · Service names and port numbers are used to distinguish between different services that run over transport protocols such as TCP, UDP, DCCP, and SCTP. Service names are assigned on a first-come, first-served process, as documented in [ RFC6335 ]. Although the Objectives do not list them, you should take note of the Ports commonly used with these Protocols. The Security+ SY0-401 Objectives provide the following ports and protocols list: 1.4 Given a scenario, implement common protocols and services.