When surfing the Internet, we often see and use the word "port".
To the port number, such as "? Q2 1 ",2 1 indicates the port number.
So what exactly does a port mean? How to check the port number? Is a port successful?
What about the door of malicious network attacks? How to face various ports?
And then what? The following will introduce this aspect for your reference.
Port introduction: This paper introduces the concept, classification and how to close/open the port.
port
2 1 port: 2 1 port is mainly used for FTP (file transfer protocol).
Transport protocol) service.
Port 23: Port 23 is mainly used for Telnet service, especially the Internet.
Login and simulation programs commonly used on the Internet.
Port 25: Port 25 is SMTP (simple Mail Transfer Protocol).
Mail transfer protocol) server, mainly used to send mail, now the vast majority.
Mail servers all use this protocol.
Port 53: Port 53 is DNS (Domain Name Server).
The server is open and mainly used for domain name resolution and DNS services used by NT system.
The most extensive
Ports 67 and 68: Ports 67 and 68 are the boot protocols of Bootp respectively.
Server (Boot Protocol Server) and Boot Protocol Client (Boot)
Serial protocol client) open port.
Port 69: TFTP is a simple file transfer protocol developed by Cisco, which is a class.
Similar to FTP.
Port 79: Port 79 is open for finger service and is mainly used for querying remote hosts.
Details of online users, operating system type, whether the buffer overflows, etc.
Port 80: Port 80 is HTTP (Hypertext Transfer Protocol, Super
Text transfer protocol is the most widely used protocol for surfing the internet, which is mainly used for
A protocol for transmitting information on the WWW service.
Port 99: Port 99 is used for a sub-game named Metagrammar Relay.
Delay) service, which is relatively rare and generally not used.
109, 1 10 port: 109 port is used for POP2 (post office protocol version
2. post office protocol 2) The service is open and the port 1 10 is POP3 (mail protocol 3).
Open service, POP2 and POP3 are mainly used to receive mail.
1 1 1 port:11port is RPC (remote procedure call,
Remote procedure call) service, which is mainly used for different programs in distributed systems.
RPC is an important component of computer internal process communication in various network services.
1 13 port: 1 13 port is mainly used for "authentication service" of Windows.
(authentication service).
1 19 port: 1 19 port is network news transfer protocol.
Network Newsgroup Transport Protocol (NNTP) is open.
Port 135: Port 135 is mainly used to use RPC (remote procedure call,
Remote procedure call) protocol and provide DCOM (Distributed Component Object Model) service.
Port 137: Port 137 is mainly used for NetBIOS name service (NetBIOS
Name service).
Port 139: Port 139 is for NetBIOS Session Service.
Mainly used to provide Windows files and printers * * * and Samba services in Unix.
Service.
Port 143: Port 143 is mainly used for "Internet message access".
Protocol v2 (Internet Message Access Protocol, IMAP for short).
16 1 port: 16 1 port is used for simple network management.
Protocol "(Simple Network Management Protocol, SNMP for short).
Port 443: Port 43 is a web browsing port, which is mainly used for HTTPS service.
Is another HTTP that provides encryption and transmission through secure ports.
Port 554: By default, port 554 is used for Live Streaming.
Protocol "(real-time streaming protocol, RTSP).
Port 1024: Port 1024 is not normally assigned to a service.
The interpretation is "reservation".
Port 1080: Port 1080 is the port used by Socks proxy service. Usually,
WWW service for surfing the Internet uses proxy service of HTTP protocol.
Port 1755: By default, port 1755 is used for Microsoft Media Server.
(Microsoft Media Server, MMS for short).
4000 port: 4000 port is used for QQ chat tools that people often use.
In detail, it is a port open to QQ clients, and the port used by QQ server is
8000。
Port 5554: On April 30th this year, it was reported that there was lsass against Microsoft.
The new worm of service. Sasser, you can use it.
TCP 5554 port opens FTP service, which is mainly used for the spread of viruses.
Port 5632: Port 5632 is a familiar remote control software.
PcAnywhere open port.
Port 8080: Port 8080 is the same as port 80 and is used for WWW proxy service.
Web browsing can be realized.