/var/log/messages

Dec 12 16:03:39 bananapi logger: DENY sshd connection from 113.108.21.16 (CN)
Dec 12 16:12:59 bananapi logger: DENY sshd connection from 185.110.132.202 (IP Address not found)
Dec 12 16:20:12 bananapi logger: DENY sshd connection from 121.18.238.98 (CN)
Dec 12 16:24:57 bananapi logger: DENY sshd connection from 185.110.132.202 (IP Address not found)
Dec 12 16:26:20 bananapi logger: DENY sshd connection from 121.18.238.114 (CN)
Dec 12 16:29:10 bananapi logger: DENY sshd connection from 221.194.44.195 (CN)
Dec 12 16:30:55 bananapi logger: DENY sshd connection from 221.194.47.249 (CN)
Dec 12 16:37:06 bananapi logger: DENY sshd connection from 185.110.132.202 (IP Address not found)
Dec 12 16:49:14 bananapi logger: DENY sshd connection from 185.110.132.202 (IP Address not found)
Dec 12 16:59:37 bananapi logger: DENY sshd connection from 54.249.52.56 (JP)
Dec 12 17:50:04 bananapi logger: ALLOW sshd connection from 192.168.0.10 (Private network)

bananapi:~# geoiplookup 185.110.132.202
GeoIP Country Edition: IP Address not found

/var/log/messages ... test from intern to extern ip address from t-online
Dec 12 18:26:35 bananapi logger: DENY sshd connection from 222.239.10.143 (KR)
Dec 12 18:41:05 bananapi logger: ALLOW sshd connection from 46.92.139.127 (DE) <= ok