On Fri, Apr 03, 2009 at 14:54, Ed Brown wrote:

> Are /etc/hosts.allow and /etc/hosts.deny being used for access control  
> on the cluster?  Perhaps the new MacBook ip is not permitted?  Logs on  
> the cluster probably explain the failure, since that side is closing the  
> connection.

Ed,

Bingo!

Thanks much.

Cheers,
 Pann

> Pann McCuaig wrote:
>> So here's the deal. One of my users just bought a small MacBook to keep
>> her MacBook Pro company. Both are running fully updated Leopard.
>>
>> She can log into our computing cluster login node, which is running
>> SL4.7, just fine with her MacBook Pro. When she attempts to log into the
>> same host with her MacBook, she gets this:
>>
>> bash-3.2$ ssh -vv cluster.econ.columbia.edu
>> OpenSSH_5.1p1, OpenSSL 0.9.7l 28 Sep 2006
>> debug1: Reading configuration data /etc/ssh_config
>> debug2: ssh_connect: needpriv 0
>> debug1: Connecting to cluster.econ.columbia.edu [128.59.160.209] port 22.
>> debug1: Connection established.
>> debug1: identity file /Users/(masked)/.ssh/identity type -1
>> debug1: identity file /Users/(masked)/.ssh/id_rsa type -1
>> debug1: identity file /Users/(masked)/.ssh/id_dsa type -1
>> ssh_exchange_identification: Connection closed by remote host
>> bash-3.2$
>>
>> No password is requested, although that should be the fallback
>> authentication method.
>>
>> /etc/ssh_config on both her Macs are box stock: all the defaults are
>> listed as comments.
>>
>> HOWEVER, not only can she log into assorted non-SL unix and linux
>> systems with her new MacBook, she can log into a host running SL5.3.
>>
>> /etc/sshd_config on both the SL4.7 and SL5.3 box are just as they come
>> from the rpm, except for:
>>
>> PermitRootLogin no
>>
>> SL4.7
>> -----
>> openssh-3.9p1-11.el4_7.x86_64
>> openssh-askpass-3.9p1-11.el4_7.x86_64
>> openssh-askpass-gnome-3.9p1-11.el4_7.x86_64
>> openssh-clients-3.9p1-11.el4_7.x86_64
>> openssh-server-3.9p1-11.el4_7.x86_64
>>
>> SL5.3
>> -----
>> openssh-4.3p2-29.el5.x86_64
>> openssh-askpass-4.3p2-29.el5.x86_64
>> openssh-clients-4.3p2-29.el5.x86_64
>> openssh-server-4.3p2-29.el5.x86_64
>>
>> Anyone have ANY IDEA what's going on?
>>
>> Cheers,
>>  Pann

-- 
Pann McCuaig <[log in to unmask]>                212-854-8689
Systems Coordinator, Economics Department, Columbia University
Department Computing Resources:
               http://www.columbia.edu/cu/economics/computing/