Non c'è niente di strano nei log, ci sono degli accepted password da parte tua per l'account root e basta. (oltre ad una miriade di tentativi bloccati, ma è normale essendo un server esposto in rete)

Codice:
Line 12748: Sep 12 17:41:01 happycommunity sshd[15537]: Accepted password for root from 79.16.128.124 port 49470 ssh2
Line 18634: Sep 13 12:58:30 happycommunity sshd[17493]: Accepted password for root from 79.16.128.124 port 49281 ssh2
Line 23908: Sep 14 09:09:43 happycommunity sshd[20604]: Accepted password for root from 79.16.128.124 port 49365 ssh2
Line 23923: Sep 14 09:11:29 happycommunity sshd[20675]: Accepted password for root from 79.16.128.124 port 49419 ssh2
Line 24758: Sep 14 12:28:25 happycommunity sshd[26440]: Accepted password for root from 79.16.128.124 port 49346 ssh2
Line 24764: Sep 14 12:29:14 happycommunity sshd[26470]: Accepted password for root from 79.16.128.124 port 49353 ssh2
Line 24771: Sep 14 12:30:50 happycommunity sshd[26508]: Accepted password for root from 79.16.128.124 port 49428 ssh2
Line 32288: Sep 15 16:03:39 happycommunity sshd[10286]: Accepted password for root from 79.16.128.124 port 49347 ssh2
Line 37735: Sep 16 12:50:47 happycommunity sshd[14677]: Accepted password for root from 79.16.128.124 port 51389 ssh2
Line 37742: Sep 16 12:51:06 happycommunity sshd[14711]: Accepted password for root from 79.16.128.124 port 51394 ssh2
Probabile allora che sia nato tutto da una malconfigurazione di permessi di ts.