ssh/sshd hang after "debug2: channel 0: open confirm rwindow 0 rmax 32768"

[Damien Miller]

On Sun, 16 Mar 2008, Bruce Allen wrote:

> Hi Peter,
> 
> A bit more information:
> 
> (1) My hotel's IP (Pasadena Hilton, service from AT&T) is NOT properly 
> registered in DNS:
> 
>     ballen$ nslookup
>     > 12.191.122.167
>     Server:         85.37.17.16
>     Address:        85.37.17.16#53
>     ** server can't find 167.122.191.12.in-addr.arpa: NXDOMAIN
> 
> (2) On opensshd version 4.8, turning UseDNS off makes no difference.
>      Is there some other config switch I should try?
> 
> (3) I CAN connect to an opensshd version 3.6 ssh daemon.
> 
> (4) As far as I can tell, the sshd_config files being used for the v 3.6
>      and v 4.8 sshd servers have only unimportant differences.
> 
> Any further thoughts or suggestions?  I have a few more days in the hotel 
> so I can try some other things.

You could try to strace/truss or ltrace the server to see where it is
stopping.

-d