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: Balkany

Region: Szabolcs-Szatmár-Bereg

Country: Hungary

Internet Service Provider: Giganet Internet Szolgaltato Kft

Hostname: unknown

Organization: MVM NET Zrt.

Usage Type: Fixed Line ISP

Comments:
Type Details Datetime
attack
Jul 17 05:10:08 pl3server postfix/smtpd[1429611]: warning: hostname 178-210-237-155.giganet.hu does not resolve to address 178.210.237.155: Name or service not known
Jul 17 05:10:08 pl3server postfix/smtpd[1429611]: connect from unknown[178.210.237.155]
Jul 17 05:10:09 pl3server postfix/smtpd[1429611]: warning: unknown[178.210.237.155]: SASL CRAM-MD5 authentication failed: authentication failure
Jul 17 05:10:09 pl3server postfix/smtpd[1429611]: warning: unknown[178.210.237.155]: SASL PLAIN authentication failed: authentication failure
Jul 17 05:10:09 pl3server postfix/smtpd[1429611]: warning: unknown[178.210.237.155]: SASL LOGIN authentication failed: authentication failure
Jul 17 05:10:09 pl3server postfix/smtpd[1429611]: disconnect from unknown[178.210.237.155]


........
-----------------------------------------------
https://www.blocklist.de/en/view.html?ip=178.210.237.155
2019-07-18 06:21:44
Comments on same subnet:
No discussion about this subnet yet..
Whois info:
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Dig info:
; <<>> DiG 9.10.3-P4-Ubuntu <<>> 178.210.237.155
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 33832
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

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

;; AUTHORITY SECTION:
.			3466	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2019071701 1800 900 604800 86400

;; Query time: 1 msec
;; SERVER: 67.207.67.2#53(67.207.67.2)
;; WHEN: Thu Jul 18 06:21:38 CST 2019
;; MSG SIZE  rcvd: 119
Host info
155.237.210.178.in-addr.arpa domain name pointer 178-210-237-155.giganet.hu.
Nslookup info:
Server:		67.207.67.2
Address:	67.207.67.2#53

Non-authoritative answer:
155.237.210.178.in-addr.arpa	name = 178-210-237-155.giganet.hu.

Authoritative answers can be found from:
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2020-04-21T11:04:06.251186vps751288.ovh.net sshd\[17199\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=91.229.92.34.bc.googleusercontent.com  user=root
2020-04-21T11:04:08.685607vps751288.ovh.net sshd\[17199\]: Failed password for root from 34.92.229.91 port 45390 ssh2
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2020-04-21T11:10:18.046984vps751288.ovh.net sshd\[17225\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=91.229.92.34.bc.googleusercontent.com
2020-04-21T11:10:19.891504vps751288.ovh.net sshd\[17225\]: Failed password for invalid user ftpuser from 34.92.229.91 port 60134 ssh2
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