Why did my ssh/ping to another mac stop working after upgrade?

i have 3 macs on network, 2 of running lion , 1 (mac mini) running sl. upgraded mbp other day, before upgrade regularly ssh me@bangarang.local (the mac mini) , connect no problem. after upgrade, fails. tried ssh me@bangarang. tried ssh me@192.168.1.9. tried ping 192.168.1.9. though that's exact ip it's using (confirmed both through ifconfig , router), won't let me in. fails:

code:

starfish:downloads mcs$ ssh mcs@192.168.1.9  ssh: connect host 192.168.1.9 port 22: operation timed out  starfish:downloads mcs$ ssh [email]mcs@bangarang.local[/email]  ssh: not resolve hostname bangarang.local: nodename nor servname provided, or not known  starfish:downloads mcs$ ping bangarang.local  ping: cannot resolve bangarang.local: unknown host  starfish:downloads mcs$ 

the thing comes mind happened after upgrading lion sl. thing else did after upgrading enable full filevault. using shared ssh key didn't have type password. other that, it's same.

 

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