ssh connection problems

[Grecy]

I'm on a LAN here at uni, and need to ssh into a particular box that is running Red Hat 7.2

When I try to ssh to the linux box in question
(ssh - l username server) I get the error:
ssh_exchange_identification: Connection closed by remote host.

I assume this is a problem with the server and not me (I can ssh to other uni boxes), so I went to see the network admins. They were all like..."ummm, I dunno... I'll have a look " so I was hoping one of you guys might know something so I could tell them what is going on.

thanks guys

-Dan

[Lorithar]

Likely the host doesn't recognize the client you are connecting from.

If you have an id on the box that you are trying to connect with, you may need to generate a client key and have it set on the host.