Should I be worried about this log?
Dec 30 13:39:39 localhost sshd[5783]: Invalid user love from ::ffff:220.130.182.186
Dec 30 13:39:41 localhost sshd[5783]: Failed password for invalid user love from ::ffff:220.130.182.186 port 48280 ssh2
Dec 30 13:39:43 localhost sshd[5786]: Invalid user love from ::ffff:220.130.182.186
Dec 30 13:39:46 localhost sshd[5786]: Failed password for invalid user love from ::ffff:220.130.182.186 port 48364 ssh2
Dec 30 13:39:51 localhost sshd[5789]: Failed password for games from ::ffff:220.130.182.186 port 48452 ssh2
Dec 30 13:39:55 localhost sshd[5791]: Failed password for games from ::ffff:220.130.182.186 port 48534 ssh2
Dec 30 13:40:00 localhost sshd[5793]: Failed password for games from ::ffff:220.130.182.186 port 48618 ssh2
Dec 30 13:40:05 localhost sshd[5795]: Failed password for games from ::ffff:220.130.182.186 port 48696 ssh2
Dec 30 13:40:09 localhost sshd[5802]: Failed password for nobody from ::ffff:220.130.182.186 port 48767 ssh2
Dec 30 13:40:14 localhost sshd[5804]: Failed password for nobody from ::ffff:220.130.182.186 port 48847 ssh2
Dec 30 13:40:19 localhost sshd[5806]: Failed password for nobody from ::ffff:220.130.182.186 port 48927 ssh2
Dec 30 13:40:23 localhost sshd[5808]: Failed password for nobody from ::ffff:220.130.182.186 port 49008 ssh2
Dec 30 13:40:25 localhost sshd[5810]: Invalid user gpm from ::ffff:220.130.182.186
Dec 30 13:40:28 localhost sshd[5810]: Failed password for invalid user gpm from ::ffff:220.130.182.186 port 49087 ssh2
Dec 30 13:40:30 localhost sshd[5813]: Invalid user gpm from ::ffff:220.130.182.186
Dec 30 13:40:32 localhost sshd[5813]: Failed password for invalid user gpm from ::ffff:220.130.182.186 port 49167 ssh2
Dec 30 13:40:35 localhost sshd[5816]: Invalid user gpm from ::ffff:220.130.182.186
Dec 30 13:40:37 localhost sshd[5816]: Failed password for invalid user gpm from ::ffff:220.130.182.186 port 49255 ssh2
Dec 30 13:40:39 localhost sshd[5819]: Invalid user jesus from ::ffff:220.130.182.186
Dec 30 13:40:42 localhost sshd[5819]: Failed password for invalid user jesus from ::ffff:220.130.182.186 port 49337 ssh2
Dec 30 13:40:42 localhost sshd[5822]: Did not receive identification string from ::ffff:220.130.182.186
Dec 30 13:39:41 localhost sshd[5783]: Failed password for invalid user love from ::ffff:220.130.182.186 port 48280 ssh2
Dec 30 13:39:43 localhost sshd[5786]: Invalid user love from ::ffff:220.130.182.186
Dec 30 13:39:46 localhost sshd[5786]: Failed password for invalid user love from ::ffff:220.130.182.186 port 48364 ssh2
Dec 30 13:39:51 localhost sshd[5789]: Failed password for games from ::ffff:220.130.182.186 port 48452 ssh2
Dec 30 13:39:55 localhost sshd[5791]: Failed password for games from ::ffff:220.130.182.186 port 48534 ssh2
Dec 30 13:40:00 localhost sshd[5793]: Failed password for games from ::ffff:220.130.182.186 port 48618 ssh2
Dec 30 13:40:05 localhost sshd[5795]: Failed password for games from ::ffff:220.130.182.186 port 48696 ssh2
Dec 30 13:40:09 localhost sshd[5802]: Failed password for nobody from ::ffff:220.130.182.186 port 48767 ssh2
Dec 30 13:40:14 localhost sshd[5804]: Failed password for nobody from ::ffff:220.130.182.186 port 48847 ssh2
Dec 30 13:40:19 localhost sshd[5806]: Failed password for nobody from ::ffff:220.130.182.186 port 48927 ssh2
Dec 30 13:40:23 localhost sshd[5808]: Failed password for nobody from ::ffff:220.130.182.186 port 49008 ssh2
Dec 30 13:40:25 localhost sshd[5810]: Invalid user gpm from ::ffff:220.130.182.186
Dec 30 13:40:28 localhost sshd[5810]: Failed password for invalid user gpm from ::ffff:220.130.182.186 port 49087 ssh2
Dec 30 13:40:30 localhost sshd[5813]: Invalid user gpm from ::ffff:220.130.182.186
Dec 30 13:40:32 localhost sshd[5813]: Failed password for invalid user gpm from ::ffff:220.130.182.186 port 49167 ssh2
Dec 30 13:40:35 localhost sshd[5816]: Invalid user gpm from ::ffff:220.130.182.186
Dec 30 13:40:37 localhost sshd[5816]: Failed password for invalid user gpm from ::ffff:220.130.182.186 port 49255 ssh2
Dec 30 13:40:39 localhost sshd[5819]: Invalid user jesus from ::ffff:220.130.182.186
Dec 30 13:40:42 localhost sshd[5819]: Failed password for invalid user jesus from ::ffff:220.130.182.186 port 49337 ssh2
Dec 30 13:40:42 localhost sshd[5822]: Did not receive identification string from ::ffff:220.130.182.186
-Michael
