Help... Ports.

[jonny_clydesdale]

Hi guys..

Stuck on this question...

what exactly is a Port and how does it work..

and what are the default port numbers for

http
ftp
smtp..

any info or web sites i could go to would be great..

cheers

jonny

[jonny_clydesdale]

any info on DNS and IP address would also be appreciated.

cheers

Jonny

[NDC]

http - HyperText Transfer Protocol.The protocol most often used to transfer information from World Wide Web servers to browsers, which is why Web addresses begin with "http".Also" TARGET=_blank>http://.Also</A> called Hypertext Transport Protocol.


ftp - File Transfer Protocol.A client/server protocol for exchanging files with a host computer.Examples are Xmodem, Ymodem, Zmodem and Kermit.


smp - Simple Mail Transfer Protocol.A server-to-server protocol for delivering electronic mail.The standard protocol used on the Internet; also used on other TCP/IP networks.


dns - Domain Name System.A database system that translates an IP address into a domain name.For example, a numeric address like 232.452.120.54 can become something like xyz.com.


IP - Internet Protocol.The IP part of TCP/IP; the protocol that is used to route a data packet from its source to its destination over the Internet.2.Intellectual Property.



[This message has been edited by NDC (edited 02-05-2001).]

[socalgal]

Hi jonny

http://packetstorm.securify.com/papers/firewall/firewall-seen.htm

http://advice.networkice.com/advice/Exploits/Ports/default.htm