> ssh need to be open on WAN interface and all user that have real shell
> could be disabled for security concern.

Be careful when trying to disable users via their login shell:

http://www.lightconsulting.com/~travis/  -><-
"We already have enough fast, insecure systems." -- Schneier & Ferguson
GPG fingerprint: 50A1 15C5 A9DE 23B9 ED98 C93E 38E9 204A 94C2 641B

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