(sshd) Failed SSH login from 180.169.24.253 (CN/China/-): 5 in the last 3600 secs; Ports: *; Direction: inout; Trigger: LF_SSHD; Logs: Apr 26 06:54:19 s1 sshd[7781]: Invalid user aeriell from 180.169.24.253 port 58177
Apr 26 06:54:21 s1 sshd[7781]: Failed password for invalid user aeriell from 180.169.24.253 port 58177 ssh2
Apr 26 06:54:47 s1 sshd[7792]: Invalid user aeriell from 180.169.24.253 port 27800
Apr 26 06:54:50 s1 sshd[7792]: Failed password for invalid user aeriell from 180.169.24.253 port 27800 ssh2
Apr 26 06:55:16 s1 sshd[7835]: Invalid user aeriell from 180.169.24.253 port 44569

2020-04-26T06:57:44.768603sd-86998 sshd[21803]: Invalid user wangying from 111.32.171.53 port 54996
2020-04-26T06:57:44.774054sd-86998 sshd[21803]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=111.32.171.53
2020-04-26T06:57:44.768603sd-86998 sshd[21803]: Invalid user wangying from 111.32.171.53 port 54996
2020-04-26T06:57:46.460440sd-86998 sshd[21803]: Failed password for invalid user wangying from 111.32.171.53 port 54996 ssh2
2020-04-26T07:02:19.761080sd-86998 sshd[22194]: Invalid user skan from 111.32.171.53 port 52414
...

Apr 26 04:41:10 localhost sshd\[23558\]: Invalid user student1 from 66.70.130.153 port 37054
Apr 26 04:41:10 localhost sshd\[23558\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=66.70.130.153
Apr 26 04:41:12 localhost sshd\[23558\]: Failed password for invalid user student1 from 66.70.130.153 port 37054 ssh2
...

too many failed pop/imap login attempts

SSH Brute-Forcing (server1)

Apr 26 03:55:17 hermescis postfix/smtpd[32417]: NOQUEUE: reject: RCPT from ptr-212-224-238-37.dyn.mobistar.be[212.224.238.37]: 550 5.1.1 : Recipient address rejected:* from= to= proto=ESMTP helo=

[2020-04-26 01:18:45] NOTICE[1170][C-0000597b] chan_sip.c: Call from '' (103.145.12.52:54175) to extension '901146462607540' rejected because extension not found in context 'public'.
[2020-04-26 01:18:45] SECURITY[1184] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-04-26T01:18:45.459-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="901146462607540",SessionID="0x7f6c087c6998",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/103.145.12.52/54175",ACLName="no_extension_match"
[2020-04-26 01:20:59] NOTICE[1170][C-0000597f] chan_sip.c: Call from '' (103.145.12.52:57644) to extension '801146462607540' rejected because extension not found in context 'public'.
[2020-04-26 01:20:59] SECURITY[1184] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-04-26T01:20:59.343-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="801146462607540",SessionID="0x7f6c0806cbd8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/
...

2020-04-25T23:37:35.3920811495-001 sshd[24999]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.12.242.93  user=root
2020-04-25T23:37:37.5554751495-001 sshd[24999]: Failed password for root from 106.12.242.93 port 60792 ssh2
2020-04-25T23:41:55.8798851495-001 sshd[25147]: Invalid user tse from 106.12.242.93 port 37108
2020-04-25T23:41:55.8866571495-001 sshd[25147]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.12.242.93
2020-04-25T23:41:55.8798851495-001 sshd[25147]: Invalid user tse from 106.12.242.93 port 37108
2020-04-25T23:41:57.7440441495-001 sshd[25147]: Failed password for invalid user tse from 106.12.242.93 port 37108 ssh2
...

Apr 26 06:50:12 ns381471 sshd[17631]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=61.191.55.33
Apr 26 06:50:14 ns381471 sshd[17631]: Failed password for invalid user tuser from 61.191.55.33 port 34293 ssh2

54.210.219.164 - - [26/Apr/2020:05:55:07 +0200] "\x16\x03\x01\x01D\x01" 400 0 "-" "-"

$f2bV_matches

$f2bV_matches

Apr 26 01:20:35 NPSTNNYC01T sshd[20524]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=61.166.155.45
Apr 26 01:20:37 NPSTNNYC01T sshd[20524]: Failed password for invalid user julie from 61.166.155.45 port 52214 ssh2
Apr 26 01:24:40 NPSTNNYC01T sshd[21019]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=61.166.155.45
...

Apr 26 07:12:19 home sshd[14722]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=64.225.67.233
Apr 26 07:12:21 home sshd[14722]: Failed password for invalid user m1 from 64.225.67.233 port 40262 ssh2
Apr 26 07:16:08 home sshd[15255]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=64.225.67.233
...

Apr 26 07:35:36 legacy sshd[17512]: Failed password for root from 222.186.42.7 port 28987 ssh2
Apr 26 07:35:51 legacy sshd[17515]: Failed password for root from 222.186.42.7 port 51589 ssh2
...