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how to overcome with unopen port at University?

 
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guitarman
fourth grade


Joined: 04 Nov 2005
Posts: 728
PostPosted: Mon Apr 02, 2007 2:50 am    Post subject: how to overcome with unopen port at University? Reply with quote
Hello experts,

anyone know how to overcome the problem within university?
By using wireless given by my school, i can't no longer access Cpanel. I think its port is 2082 and also i can't use FTP which runs on port 21.

Any ideas, how i can overcome such issue? coz without cpanel and ftp access, i'll have problem working with my sites.

cheers,
guitarmAn
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indogo
fourth grade


Joined: 03 May 2006
Posts: 223
PostPosted: Mon Apr 02, 2007 8:33 am    Post subject: Reply with quote


Ahhhhhhhhhhhhhhhhhhhhhhh!!!!!!!!!!!!!!!!!

mmmmmmmmmmmmm

The words proxy come to mind...not sure why...or bribe tthe university network manager.

Not an expert on this one but a script on the site (port 80 ) translating to the needed ports...site file managers are a plenty and a similar approach for cpanel should be possible...just getting the scripts up there is the problem but once done...
There is a remote ftp access service available..sorry to be vague. I used it once to copy from one site to another but I can't remember the name..google time.

If and when my brain clears I'll pass on further ideas.

mike
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indogo
fourth grade


Joined: 03 May 2006
Posts: 223
PostPosted: Wed Apr 11, 2007 4:53 am    Post subject: Reply with quote
Any progress on this one?
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HarryR
first grade


Joined: 03 Apr 2007
Posts: 17
Location: United Kingdom
PostPosted: Wed Apr 11, 2007 10:04 pm    Post subject: Reply with quote
I'd say you've not got much hope on the FTP side of things, but with CPanel you may be in luck if you have a direct/NAT'ed connection to the net (rather than going through a transparent/forced proxy at your campus).

Have a quick google for proxies on port 80 and see if any of them work.
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guitarman
fourth grade


Joined: 04 Nov 2005
Posts: 728
PostPosted: Thu Apr 12, 2007 12:44 am    Post subject: Reply with quote
thanks mike and harry.

I got good luck with proxy as suggested by mike. But some proxy is so slow that i can't even view the awstat. Worst still i can't upload any large files (5mb etc). So for now, i'm using proxy to check the stat but when i need to upload any stuff, I gotta pay per Mb (7 cents per Mb here) :d

cheer
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Singachea
fourth grade


Joined: 19 Nov 2005
Posts: 258
PostPosted: Mon Apr 23, 2007 3:14 am    Post subject: Re: how to overcome with unopen port at University? Reply with quote
guitarman wrote:
Hello experts,

anyone know how to overcome the problem within university?
By using wireless given by my school, i can't no longer access Cpanel. I think its port is 2082 and also i can't use FTP which runs on port 21.

Any ideas, how i can overcome such issue? coz without cpanel and ftp access, i'll have problem working with my sites.

cheers,
guitarmAn


I just don't understand what is the problem right here. You are a client, aren't you? What's wrong with the proxy in the campus? Why do we have to care about internal port? Actually NAT will select the port for us when there is an internal request.
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guitarman
fourth grade


Joined: 04 Nov 2005
Posts: 728
PostPosted: Mon Apr 23, 2007 7:50 am    Post subject: Reply with quote
the problem is that i couldnt' use FTP.

Proxy can be used as a webbased but not on FTP client.
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Singachea
fourth grade


Joined: 19 Nov 2005
Posts: 258
PostPosted: Tue Apr 24, 2007 12:02 am    Post subject: Reply with quote
guitarman wrote:
the problem is that i couldnt' use FTP.


What I meant was that "what to do with the client port when you can't use ftp client?"

HTTP and FTP are both file transfer protocols and are considered as in Application Layer and they stands on TCP. The main different point between them is that FTP uses two parallel TCP connections to transfer a file, a control connection and a data connection.

When a user starts an FTP session with the remote host, the client side of FTP first initiates a control TCP connection with the server side on Server Port 21.

Let assume you are in a private subnet of the campus, then when you request a web page or ftp connection, NAPT (Network Address Port Translator) will translate your private ip with the port. Ex. let say your ip is 172.x.x.x/ 192.x.x.x/... and router ip interface is 136.y.y.y (global), and when you request www.ntu.edu.sg port 80, then NAPT will translate it as Source 136.y.y.y:z and Destination 155.69.5.234:80.

Port z will be used to identify your host. This is the reason that I don't understand what to do with the ports of the proxy when you are a client.
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guitarman
fourth grade


Joined: 04 Nov 2005
Posts: 728
PostPosted: Wed Apr 25, 2007 9:03 pm    Post subject: Reply with quote
one detail explanation, you made there, bro! Smile

Here is what i thought: the school wireless connection only allows port 80 connection and block all other ports.

The other day i tested the MSN live webcam but it doesn't allow me to connect as well (i'm not sure what port or what problem this related to though)
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