Ports and protocols
- 2. TCP & PORT NO 6 TRANSMISSSION CONTROL PROTOCOL Transmission control protocol (TCP) is a network communication protocol designed to send data packets over the Internet. It is connection oriented It as acknowledgement It has three handshake method It is reliable Slow data transformation
- 3. UDP & PORT NO 17 USER DATAGRAM PROTOCOL UDP uses a simple connectionless communication model with a minimum of protocol mechanism. It as NO acknowledgement Unreliable fast data transformation
- 4. FTP & PORT NO 20/21 File Transfer Protocol It used for the transfer of files between a client and server on a computer network. FTP is often secured with SSL/TLS (FTPS) or replaced with SSH File Transfer Protocol
- 5. SSH & PORT NO 22 Secure Shell (SSH) By using it we can access with a console in secure in SSH SSH was designed as a replacement for Telnet and for unsecured plain text
- 6. TELNET & PORT NO 23 Telnet provided access remote host to a command- line interface of the system Telnet is unencrypt it send plain text over the network, so it is vulnerable. SSH was designed as a replacement for Telnet
- 7. SMTP & & PORT NO 25 Simple Mail Transfer Protocol It is used to transfer mail (email) from source to destination between mail servers and it is used by end users to send email to a mail system. SMTP uses port 25, but SSL/TLS encrypted SMTP uses port 465
- 8. DNS & PORT NO 53 Domain Name System DNS is used widely on the public internet and on private networks to translate domain names into IP addresses, typically for network routing. For example, the domain name www.example.com translates to the addresses 93.184.216.34 (IPv4) and 2606:2800:220:1:248:1893:25c8:1946 (IPv6).
- 9. DHCP & PORT NO 67/68 Dynamic Host Configuration Protocol DHCP server can manage UDP/IP settings for devices on a network, by automatically or dynamically assigning IP addresses to the devices. The DHCP employs a connectionless service model, using the User Datagram Protocol (UDP). UDP port number 67 is the destination port of a server, and UDP port number 68 is used by the client.
- 10. HTTP & PORT NO 80 Hypertext Transfer Protocol (HTTP) HTTP is the main protocol that is used by web browsers and used by any client that uses files located on these servers.
- 11. POP3 & PORT NO 110 Post Office Protocol (POP) version 3 POP was designed to be very simple by allowing a client to retrieve the complete contents of a server mailbox and then deleting the contents from the server. POP3 uses port 110, but SSL/TLS encrypted POP uses port 995.
- 12. NTP & PORT NO 123 Network Time Protocol It is a networking protocol for clock synchronization between computer systems over packet-switched. NTP uses UDP/IP packets for data transfer because of the fast connection setup and response times.
- 13. IMAP & PORT NO 143 Internet Message Access Protocol IMAP version3 is the second of the main protocols used to retrieve mail from a server. IMAP uses port 143, but SSL/TLS encrypted IMAP uses port 993.
- 14. SNMP & PORT NO 161/162 Simple Network Management Protocol SNMP is used by network administrators including the ability to monitor, configure and control network devices
- 15. HTTPS & PORT NO 443 Hypertext Transfer Protocol Secure (HTTPS) It is an extension of the Hypertext Transfer Protocol (HTTP) for secure communication over a computer network. The protocol is therefore also often referred to as HTTP over TLS or HTTP over SSL.
- 16. SMB & PORT NO 445 Server Message Block It mainly used for shared information like files, printers, and serial ports and miscellaneous communications in a network.
- 17. RDP & PORT NO 3389 Remote Desktop Protocol It user with a graphical interface to connect to another computer over a network connection The user employs RDP client software for this purpose, while the other computer must run RDP server software
- 18. SQL Server & PORT NO 1433 Nessus scanner & PORT NO 8834 ArcSight ESM & PORT NO 8443 proxy Server & PORT NO 8080