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proxy servers
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| meneedit |
I go to this site on the net called HowStuffWorks.com to learn a little bit about computers and all that. It's not a very detailed site with only a few facts about each thing but I use it because I can't find anything more detailed on the net.
Anyway, I went on there yesterday to learn about setting up the internet via a proxy server. Now, I know how some of this works...
for example, we have this setup here at work and I know that you have to enter in the "Proxy Address" then port 80 for it to recognize the server, but what I want to know is whats with the number 80?
can someone please explain port 80 to me?
thanks :) |
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| Noctone |
| It's the HTTP port. |
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| meneedit |
wow so much detail!
care to elaborate :o |
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| Orbax |
| Do you know what ports are? |
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| meneedit |
| sorta, I just dont see why they use the word port when it comes to "http" |
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| Transporter |
A port number represents an endpoint or "channel" for network communications. Port numbers allow different applications on the same computer to utilize network resources without interfering with each other.
Port numbers most commonly appear in network programming, particularly socket programming. Sometimes, though, port numbers are made visible to the casual user. For example, some Web sites a person visits on the Internet use a URL like the following:
http://www.mairie-metz.fr:8080/
In this example, the number 8080 refers to the port number used by the Web browser to connect to the Web server. Normally, a Web site uses port number 80 and this number need not be included with the URL (although it can be).
In IP networking, port numbers can theoretically range from 0 to 65535. Most popular network applications, though, use port numbers at the low end of the range (such as 80 for HTTP). The port number is included as a field within the header of each IP packet.
Note: The term port also refers to several other aspects of network technology. A port can refer to a physical connection point for peripheral devices such as serial, parallel, and USB ports. The term port also refers to certain Ethernet connection points, such as those on a hub, switch, or router.
Also Known As: port number, protocol number |
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| Fundamental |
Nice explanation there, Transporter.
(Unless you copied and pasted it, in which case you are getting no congratulations from me. Bastard.) |
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| Tranc3 |
Think of ports like doors - you can only go through if you open a door first. If I remember correctly, there's 32000 ports total, most of which will (or should, rather) be closed. Some are reserved...well not reserved per se, but traditionally used for the same kind of action. Web (http) stuff usually goes through port 80, sometimes 8080, 8081 I think. FTP servers usually go on port 21, Windows networking verification is 13 I think. Anyways, each port is traditionally assigned to do a certain function, although it's certainly possible to do some websurfing on, say, port 590.
Oh yeah btw the Doom port for multiplayer games is 666, i thought that was pretty cool. |
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| Transporter |
| quote: | | Nice explanation there, Transporter. |
| quote: | | (Unless you copied and pasted it, in which case you are getting no congratulations from me. Bastard.) |
OF course I did .. you actually think i'd waste my time explaining what a port is?.. I don't recall anyone asking my own interpretation of what a port is ....besides the guy was just asking and I tried to explain the quickest way possible.:whip: of all the posts so far which do you understand better?
P.S. More for your reading enjoyment Here |
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| meneedit |
| so transporter.... what would happen if I put in the FTP port number and then tried to load up a web page? |
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| Transporter |
I don't really understand the question ..
you mean if you did this? http://www.google.com:21 in this case nothing will happen because port 21 is used to transfer files.
To use port 21 you need an ftp program or if you like good old dos you can open up a DOS window and type:
ftp
open ftp.addressyouwant.xxx |
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