Hello guys, hope you all are fine. So let's get straight to the business. Today we are gonna learn about computer ports and why are they so important. So let's stretch the level of technology.
Port are both hardware and software type. Hardware ports are like usb port, ethernet port, RJ-45port, VGA port etc. But we are going to discuss about port of computer network.
PORT: Port is an end point of a network just like a ship in a sea which has port where it stops. So, a network always has an end point which is called port. Every services running on computer uses a certain port just like a vehicle needs wheels to move. Port is also consider as a medium which separates each services on the network. You can relate this with a palace of king having many doors where each door is used for definite task as per protocol set up by the king. So, port is like a door also where each port holds the entry ticket for a definite service. As we know while surfing the web, we do not simply surf the web but also download or upload the files, play online games, watching live t.v, sending emails etc. So, for that reason we use various protocols which needs various ports. For example, to surf http (Hyper Text Transfer Protocol) web pages, we use http protocol which runs on port 80 of network.This port is used for surfing http web pages and disabling this port will result failure in access of any http web pages. Similarly, to transfer a file over internet we need ftp protocol i.e, to upload and download the files. Ftp (File Transfer Protocol) protocol runs over port 20. Similarly, udp (User Datagram Protocol) protocol is used for online gaming, watching live t.v which runs over port.
So each and every services of computer uses a definite port to run which is also a medium to separate each services on the network. Hence our system will understand that which service should be used for a definite task. For example mail server uses smtp (simple Mail Transfer Protocol) protocol which by default runs over port 25. Smtp protocol is used for mail services over the internet. We are giving you the picture of a simple port scanning result of our blog using kali linux.
Common Ports
21 FTP (File Transfer Protocol)
22 SSH (Secure Shell)
23 Telnet
25 SMTP (Send Mail Transfer Protocol)
43 whois
53 DNS (Domain Name Service)
68 DHCP (Dynamic Host Control Protocol)
79 Finger
80 HTTP (HyperText Transfer Protocol)
110 POP3 (Post Office Protocol, version 3)
115 SFTP (Secure File Transfer Protocol)
119 NNTP (Network New Transfer Protocol)
123 NTP (Network Time Protocol)
137 NetBIOS-ns
138 NetBIOS-dgm
139 NetBIOS
143 IMAP (Internet Message Access Protocol)
161 SNMP (Simple Network Management Protocol)
194 IRC (Internet Relay Chat)
220 IMAP3 (Internet Message Access Protocol 3)
389 LDAP (Lightweight Directory Access Protocol)
443 SSL (Secure Socket Layer)
445 SMB (NetBIOS over TCP)
666 Doom
993 SIMAP (Secure Internet Message Access Protocol)
995 SPOP (Secure Post Office Protocol)
1243 SubSeven (Trojan - security risk!)
1352 Lotus Notes
1433 Microsoft SQL Server
1494 Citrix ICA Protocol
1521 Oracle SQL
1604 Citrix ICA / Microsoft Terminal Server
2049 NFS (Network File System)
3306 mySQL
4000 ICQ
5010 Yahoo! Messenger
5190 AOL Instant Messenger
5632 PCAnywhere
5800 VNC
5900 VNC
6000 X Windowing System
6699 Napster
6776 SubSeven (Trojan - security risk!)
7070 RealServer / QuickTime
7778 Unreal
8080 HTTP
26000 Quake
27010 Half-Life
27960 Quake III
31337 BackOrifice (Trojan - security risk!)
Ports between 1024 and 29151 are known as the Registered Ports. Basically, programs are supposed to register their use of these ports and thereby try to be careful and avoid stomping on each other. Here are some common ports and their programs. For security reason you should check how many ports are open on your system and if there is any unnecessary port is open on your system then you should close that port.
Hope you found this piece of information useful. That's all for today. We will be back soon. Till then like, share and subscribe our blog.
Port are both hardware and software type. Hardware ports are like usb port, ethernet port, RJ-45port, VGA port etc. But we are going to discuss about port of computer network.
PORT: Port is an end point of a network just like a ship in a sea which has port where it stops. So, a network always has an end point which is called port. Every services running on computer uses a certain port just like a vehicle needs wheels to move. Port is also consider as a medium which separates each services on the network. You can relate this with a palace of king having many doors where each door is used for definite task as per protocol set up by the king. So, port is like a door also where each port holds the entry ticket for a definite service. As we know while surfing the web, we do not simply surf the web but also download or upload the files, play online games, watching live t.v, sending emails etc. So, for that reason we use various protocols which needs various ports. For example, to surf http (Hyper Text Transfer Protocol) web pages, we use http protocol which runs on port 80 of network.This port is used for surfing http web pages and disabling this port will result failure in access of any http web pages. Similarly, to transfer a file over internet we need ftp protocol i.e, to upload and download the files. Ftp (File Transfer Protocol) protocol runs over port 20. Similarly, udp (User Datagram Protocol) protocol is used for online gaming, watching live t.v which runs over port.
So each and every services of computer uses a definite port to run which is also a medium to separate each services on the network. Hence our system will understand that which service should be used for a definite task. For example mail server uses smtp (simple Mail Transfer Protocol) protocol which by default runs over port 25. Smtp protocol is used for mail services over the internet. We are giving you the picture of a simple port scanning result of our blog using kali linux.
Below we are giving you a few list of services along with the port over which they run.
Common Ports
Port No Service
20 FTP data (File Transfer Protocol) 21 FTP (File Transfer Protocol)
22 SSH (Secure Shell)
23 Telnet
25 SMTP (Send Mail Transfer Protocol)
43 whois
53 DNS (Domain Name Service)
68 DHCP (Dynamic Host Control Protocol)
79 Finger
80 HTTP (HyperText Transfer Protocol)
110 POP3 (Post Office Protocol, version 3)
115 SFTP (Secure File Transfer Protocol)
119 NNTP (Network New Transfer Protocol)
123 NTP (Network Time Protocol)
137 NetBIOS-ns
138 NetBIOS-dgm
139 NetBIOS
143 IMAP (Internet Message Access Protocol)
161 SNMP (Simple Network Management Protocol)
194 IRC (Internet Relay Chat)
220 IMAP3 (Internet Message Access Protocol 3)
389 LDAP (Lightweight Directory Access Protocol)
443 SSL (Secure Socket Layer)
445 SMB (NetBIOS over TCP)
666 Doom
993 SIMAP (Secure Internet Message Access Protocol)
995 SPOP (Secure Post Office Protocol)
1243 SubSeven (Trojan - security risk!)
1352 Lotus Notes
1433 Microsoft SQL Server
1494 Citrix ICA Protocol
1521 Oracle SQL
1604 Citrix ICA / Microsoft Terminal Server
2049 NFS (Network File System)
3306 mySQL
4000 ICQ
5010 Yahoo! Messenger
5190 AOL Instant Messenger
5632 PCAnywhere
5800 VNC
5900 VNC
6000 X Windowing System
6699 Napster
6776 SubSeven (Trojan - security risk!)
7070 RealServer / QuickTime
7778 Unreal
8080 HTTP
26000 Quake
27010 Half-Life
27960 Quake III
31337 BackOrifice (Trojan - security risk!)
Ports between 1024 and 29151 are known as the Registered Ports. Basically, programs are supposed to register their use of these ports and thereby try to be careful and avoid stomping on each other. Here are some common ports and their programs. For security reason you should check how many ports are open on your system and if there is any unnecessary port is open on your system then you should close that port.
Hope you found this piece of information useful. That's all for today. We will be back soon. Till then like, share and subscribe our blog.
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