Port scan: Attack repeated for 24 hours

Sep 11 23:57:43 sshgateway sshd\[5647\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=161.35.140.204  user=root
Sep 11 23:57:45 sshgateway sshd\[5647\]: Failed password for root from 161.35.140.204 port 41254 ssh2
Sep 11 23:59:00 sshgateway sshd\[5877\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=161.35.140.204  user=root

fell into ViewStateTrap:brussels

[2020-09-11 16:54:32] NOTICE[1239] chan_sip.c: Registration from '"500" ' failed for '82.205.8.114:5067' - Wrong password
[2020-09-11 16:54:32] SECURITY[1264] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-09-11T16:54:32.250-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="500",SessionID="0x7f4d480d6c18",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/82.205.8.114/5067",Challenge="23e285c7",ReceivedChallenge="23e285c7",ReceivedHash="b8dd833293dc43ef4f0e2462836c2ef2"
[2020-09-11 16:59:02] NOTICE[1239] chan_sip.c: Registration from '"4005" ' failed for '82.205.8.114:5070' - Wrong password
[2020-09-11 16:59:02] SECURITY[1264] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-09-11T16:59:02.247-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="4005",SessionID="0x7f4d480d6c18",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/82.205.8
...

Sep 11 21:12:57 sshgateway sshd\[12659\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=161.35.32.43  user=root
Sep 11 21:12:59 sshgateway sshd\[12659\]: Failed password for root from 161.35.32.43 port 37248 ssh2
Sep 11 21:15:40 sshgateway sshd\[13044\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=161.35.32.43  user=root

Sep 12 00:03:51 sshgateway sshd\[6767\]: Invalid user user from 101.255.124.93
Sep 12 00:03:51 sshgateway sshd\[6767\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=101.255.124.93
Sep 12 00:03:52 sshgateway sshd\[6767\]: Failed password for invalid user user from 101.255.124.93 port 48430 ssh2

Sep 11 20:08:58 srv01 postfix/smtpd\[13472\]: warning: unknown\[111.72.193.11\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Sep 11 20:12:27 srv01 postfix/smtpd\[18613\]: warning: unknown\[111.72.193.11\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Sep 11 20:15:56 srv01 postfix/smtpd\[16922\]: warning: unknown\[111.72.193.11\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Sep 11 20:16:08 srv01 postfix/smtpd\[16922\]: warning: unknown\[111.72.193.11\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Sep 11 20:16:24 srv01 postfix/smtpd\[16922\]: warning: unknown\[111.72.193.11\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
...

Sep 12 00:31:31 sshgateway sshd\[10962\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=49.235.74.226  user=root
Sep 12 00:31:33 sshgateway sshd\[10962\]: Failed password for root from 49.235.74.226 port 50002 ssh2
Sep 12 00:35:15 sshgateway sshd\[11626\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=49.235.74.226  user=root

Time:     Sat Sep 12 00:16:13 2020 +0200
IP:       152.136.196.155 (CN/China/-)
Failures: 5 (sshd)
Interval: 3600 seconds
Blocked:  Permanent Block [LF_SSHD]

Log entries:

Sep 12 00:07:30 mail-03 sshd[19130]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=152.136.196.155  user=root
Sep 12 00:07:32 mail-03 sshd[19130]: Failed password for root from 152.136.196.155 port 58228 ssh2
Sep 12 00:12:02 mail-03 sshd[19180]: Invalid user mediator from 152.136.196.155 port 46644
Sep 12 00:12:04 mail-03 sshd[19180]: Failed password for invalid user mediator from 152.136.196.155 port 46644 ssh2
Sep 12 00:16:09 mail-03 sshd[19267]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=152.136.196.155  user=root

Telnet Honeypot -> Telnet Bruteforce / Login

Sep 11 22:37:18 sshgateway sshd\[25173\]: Invalid user smooch from 144.34.203.73
Sep 11 22:37:18 sshgateway sshd\[25173\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=144.34.203.73.16clouds.com
Sep 11 22:37:21 sshgateway sshd\[25173\]: Failed password for invalid user smooch from 144.34.203.73 port 51876 ssh2

(pop3d) Failed POP3 login from 172.93.184.179 (US/United States/-): 1 in the last 3600 secs; Ports: *; Direction: inout; Trigger: LF_TRIGGER; Logs: Sep 11 21:24:51 ir1 dovecot[3110802]: pop3-login: Disconnected (auth failed, 1 attempts in 2 secs): user=, method=PLAIN, rip=172.93.184.179, lip=5.63.12.44, session=

Bruteforce detected by fail2ban

Sep 12 00:14:12 MainVPS sshd[19993]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=164.132.73.220  user=root
Sep 12 00:14:14 MainVPS sshd[19993]: Failed password for root from 164.132.73.220 port 54294 ssh2
Sep 12 00:17:48 MainVPS sshd[27016]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=164.132.73.220  user=root
Sep 12 00:17:51 MainVPS sshd[27016]: Failed password for root from 164.132.73.220 port 35386 ssh2
Sep 12 00:21:15 MainVPS sshd[1436]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=164.132.73.220  user=root
Sep 12 00:21:16 MainVPS sshd[1436]: Failed password for root from 164.132.73.220 port 44708 ssh2
...

Fail2Ban Ban Triggered