Must be a valid IPv4 or IPv6 ip address, e.g. 127.0.0.1 or 2001:DB8:0:0:8:800:200C:417A
Basic Info

City: unknown

Region: unknown

Country: Netherlands

Internet Service Provider: Microsoft Corporation

Hostname: unknown

Organization: unknown

Usage Type: Data Center/Web Hosting/Transit

Comments:
Type Details Datetime
attack
Jul  5 07:48:26 mockhub sshd[10303]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=52.157.84.245
Jul  5 07:48:28 mockhub sshd[10303]: Failed password for invalid user centos from 52.157.84.245 port 21826 ssh2
...
2020-07-06 01:07:12
Comments on same subnet:
No discussion about this subnet yet..
Whois info:
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Dig info:
; <<>> DiG 9.10.3-P4-Ubuntu <<>> 52.157.84.245
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 29171
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;52.157.84.245.			IN	A

;; AUTHORITY SECTION:
.			139	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2020070500 1800 900 604800 86400

;; Query time: 174 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Mon Jul 06 01:06:52 CST 2020
;; MSG SIZE  rcvd: 117
Host info
Host 245.84.157.52.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 245.84.157.52.in-addr.arpa: NXDOMAIN
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