May 15 06:28:53 Host-KLAX-C dovecot: imap-login: Disconnected (auth failed, 1 attempts in 5 secs): user=, method=PLAIN, rip=197.44.37.142, lip=185.198.26.142, TLS: Disconnected, session=
...

May 15 14:19:35 vps687878 sshd\[8246\]: Failed password for invalid user admin from 14.116.208.72 port 37260 ssh2
May 15 14:23:48 vps687878 sshd\[8682\]: Invalid user oko from 14.116.208.72 port 35852
May 15 14:23:48 vps687878 sshd\[8682\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=14.116.208.72
May 15 14:23:49 vps687878 sshd\[8682\]: Failed password for invalid user oko from 14.116.208.72 port 35852 ssh2
May 15 14:28:15 vps687878 sshd\[9153\]: Invalid user wangzy from 14.116.208.72 port 34443
May 15 14:28:15 vps687878 sshd\[9153\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=14.116.208.72
...

A logarithm is the power to which a number must be raised in order to get some other number (see Section 3 of this Math Review for more about exponents). For example, the base ten logarithm of 100 is 2, because ten raised to the power of two is 100: log 100 = 2. because. 102 = 100.

May 13 20:59:57 ns sshd[3515]: Connection from 104.239.136.8 port 37264 on 134.119.39.98 port 22
May 13 20:59:58 ns sshd[3515]: Invalid user postgres from 104.239.136.8 port 37264
May 13 20:59:58 ns sshd[3515]: Failed password for invalid user postgres from 104.239.136.8 port 37264 ssh2
May 13 20:59:58 ns sshd[3515]: Received disconnect from 104.239.136.8 port 37264:11: Bye Bye [preauth]
May 13 20:59:58 ns sshd[3515]: Disconnected from 104.239.136.8 port 37264 [preauth]
May 13 21:07:10 ns sshd[23139]: Connection from 104.239.136.8 port 40782 on 134.119.39.98 port 22
May 13 21:07:17 ns sshd[23139]: Connection closed by 104.239.136.8 port 40782 [preauth]
May 13 21:09:28 ns sshd[19026]: Connection from 104.239.136.8 port 32796 on 134.119.39.98 port 22
May 13 21:09:33 ns sshd[19026]: Invalid user eom from 104.239.136.8 port 32796
May 13 21:09:33 ns sshd[19026]: Failed password for invalid user eom from 104.239.136.8 port 32796 ssh2
May 13 21:09:33 ns sshd[19026]: Received d........
-------------------------------

May 15 13:35:27 163-172-32-151 sshd[21764]: Invalid user admin from 180.76.173.75 port 51098
...

2020-05-15T12:26:28.289589shield sshd\[27762\]: Invalid user duck from 14.29.167.181 port 56734
2020-05-15T12:26:28.295615shield sshd\[27762\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=14.29.167.181
2020-05-15T12:26:29.937354shield sshd\[27762\]: Failed password for invalid user duck from 14.29.167.181 port 56734 ssh2
2020-05-15T12:28:52.834833shield sshd\[28258\]: Invalid user svn from 14.29.167.181 port 40852
2020-05-15T12:28:52.838550shield sshd\[28258\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=14.29.167.181

Automatic report - Port Scan Attack

DATE:2020-05-15 08:36:29, IP:190.57.152.52, PORT:telnet Telnet brute force auth on honeypot server (honey-neo-dc)

k+ssh-bruteforce

Brute-force attempt banned

Invalid user debian from 142.93.101.148 port 58274

20/5/14@23:47:50: FAIL: Alarm-Network address from=171.224.116.231
...

2020-05-15T06:03:29.834241linuxbox-skyline auth[21014]: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=yao rhost=45.142.195.8
...

2020-05-15T15:36:48.275511afi-git.jinr.ru sshd[2777]: Failed password for root from 222.186.173.226 port 25955 ssh2
2020-05-15T15:36:51.566259afi-git.jinr.ru sshd[2777]: Failed password for root from 222.186.173.226 port 25955 ssh2
2020-05-15T15:36:55.267524afi-git.jinr.ru sshd[2777]: Failed password for root from 222.186.173.226 port 25955 ssh2
2020-05-15T15:36:55.267639afi-git.jinr.ru sshd[2777]: error: maximum authentication attempts exceeded for root from 222.186.173.226 port 25955 ssh2 [preauth]
2020-05-15T15:36:55.267653afi-git.jinr.ru sshd[2777]: Disconnecting: Too many authentication failures [preauth]
...

Brute-force general attack.