Connecting via sftp

I'm having problems connecting to a server via sftp. My friend on a macbook pro using the same internet provider is not having problems connecting/logging in (same username/pwd). What settings on my macbook pro could be preventing my sftp access? I've tried using cyberduck and terminal. I am using port 22. I can access another network via VPN. I have a router but have been told this should not be the issue.
I get the following from terminal session:
Last login: Fri Nov 9 20:51:10 on ttyp2
Welcome to Darwin!
yyys-computer:~ yyy$ sftp [email protected]
Connecting to xxx.org...
sshexchangeidentification: Connection closed by remote host
Connection closed
Thanks in advance,
Brenda

Are you using Kerberos?
I've seen this problem happen when tickets don't get forwarded properly.
In this case you need to enable the GSSAPIDelegateCredentials option for the remote host in ~/.ssh/config

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Tim,
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I have been having problems with the internet connection via Airport Extreme which I find it a bit unusual and its still driving me nuts! This is what happened:
I have lost my internet connection last Sunday evening upon my return from a weekend away from home. The last time I have used the internet connection on my macbook was the previous Friday morning. Prior to the apparent disconnection on Sunday, I have always used my internet connection wirelessly through Airport Extreme (that is connected via ethernet cable to the NETGEAR DG834v2 ADSL modem which had worked beautifully until the problem arose on my return). This wireless internet connection allowed me to surf the internet anywhere in my home.
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Solved!
Go to Solution.

It's not valid to have two devices connected to the ONT, PC and VZ Router. Must be a single device. The ONT locks onto the MAC Address of the first device it sees. Since you have TV you should have the VZ router as the internet facing router.
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