The reason is that I didn't start pseudorandom number generator daemon (prngd).
After starting prngd, everything is fine. Some handy scripts can be downloaded
from www.sun.com/blueprints/tools/. Some doc at
http://www.sun.com/blueprints/0701/openSSH.pdf is helpful if you want to build
openssh from scratch.

Thanks to the following people.
"John Kerbawy" <john at maKintosh.com>
"Nicolas Dorfsman" <ndo at woup.net>
"David LaPorte" <david_laporte at harvard.edu>

Here is the original question:> I installed openssh 3.0.2p1 (package downloaded from
> sunfreeware.com) and
> somehow it doesn't work. Whenever I tried to use sshd or ssh,
> I got the error
> message:
> Couldn't connect to PRNGD socket "/var/spool/prngd/pool": No
> such file or
> directory
> Entropy collection failed and entropy exhausted
>
> Here is what I did. I installed openssh 3.0.2p1 without
> removing openssh 2.9.x
> (2.9.6?) and openssh 3.0.2p1 didn't work. So I removed
> openssh 2.9.x, installed
> prngd, egd, and tcp wrapper (all downloaded from
> sunfreeware.com). After all
> these, I still got the same error message. The last thing I
> did is reboot
> solaris and start sshd--I still get the same error message.
>
> Configurations: SunBlade 100, solaris 8 with 8_recommended
> patches. Openssh
> 2.9.x worked well before.
>

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