Each service corresponds the corresponding port, for instance the audiences like known by everybody the WWW service's port is 80, smtp is 25, ftp is in the 21, win2000 installment tacitly approves is these service opening. It is not unnecessary truly regarding individual user, switches off the port is also the closure useless service. “control panel” “the management tool” “the service” disposes.
1st, closes 7.9 and so on ports: Closes Simple TCP/IP Service, supports the following TCP/IP service: Character Generator, Daytime, Discard, Echo, as well as Quote of the Day.
2nd, closes 80: Switches off the WWW service. In “the service” demonstrated that the name is " World Wide Web Publishing Service ", provides the Web connection and the management through the Internet information service's management unit.
3rd, switches off 25 ports: Closes Simple Mail Transport Protocol the (SMTP) service, it provides the function is the cross net transmission email.
4th, switches off 21 ports: Closes FTP Publishing Service, it provides the service is provides the FTP connection and the management through the Internet information service management unit.
5th, switches off 23 ports: Closes the Telnet service, it allows the remote subscriber to register the system, and the use command line moves the control bench procedure.
6th, also has one very importantly closes the server service, this service provides the RPC support, the document, the printing as well as naming pipeline sharing. Switched off it to switch off the win2k default sharing, for instance ipc$, c$, admin$ and so on, this service closure did not affect you altogether he to operate.
7th, also has one is 139 ports, 139 ports are NetBIOS the Session port, uses for the document and printing sharing, what pays attention was the movement samba unix machine also opens 139 ports, the function has been same. The beforehand time 2000 use for to judge opposite party main engine type to be not too accurate, estimated that is 139 ports opens already thought is NT machine, now was good. Closes 139 to listen to the method is “local connects” in “the network and the digit dialing connection” selects “the Internet agreement (TCP/IP)” the attribute, enters “the high-level TCP/IP establishment” “the WINS establishment” inside to have one item “to be forbid TCP/IP NETBIOS”, hit cancels has closed 139 ports. Regarding individual user, may suppose in each service attribute establishment is “is forbid”, in order to avoid will restart the service also to start next time, the port also opened.
|
You are here: hacking technology
> network management
> Content
Category: Home
> network management