2604:a940:300:5b6:0:28:: was found in our database!
This IP was reported 269 times. Confidence of
Abuse
is 0%: ?
0%
Important Note: Public IPv6 addresses may implement the SLAAC
privacy extension. With this, the interface identifier is randomly generated. The SLAAC
privacy extension also implements a time out, which is configurable, so that the IPv6
interface addresses will be discarded and a new interface identifier is generated.
IP info including ISP, Usage Type, and Location provided
by IPInfo. Updated weekly.
Important Note: 2604:a940:300:5b6:0:28:: is an IP address from within
our whitelist belonging to the subnet
2604:a940:300:5b6::/64,
which we identify as: "Cortex Xpanse".
Whitelisted netblocks are typically owned by trusted entities, such as Google
or Microsoft who may use them for search engine spiders. However, these same entities
sometimes also provide cloud servers and mail services which are easily abused. Pay special
attention when trusting or distrusting these IPs.
This IP address has been reported a total of
269
times from
10 distinct
sources.
2604:a940:300:5b6:0:28:: was first reported on
, and the most recent report was
.
Recent Reports:
We have received reports of abusive activity from this IP address within the last week. It is
potentially still actively engaged in abusive activities.
Blocked by UFW (TCP on 8084)
Source port: 49429
Packet length: 60
This report (for 2604:a940:0300:0 ...
show moreBlocked by UFW (TCP on 8084)
Source port: 49429
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:0028:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
Blocked by UFW (TCP on 82)
Source port: 54869
Packet length: 60
This report (for 2604:a940:0300:05b ...
show moreBlocked by UFW (TCP on 82)
Source port: 54869
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:0028:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
Blocked by UFW (TCP on 20257)
Source port: 52580
Packet length: 60
This report (for 2604:a940:0300: ...
show moreBlocked by UFW (TCP on 20257)
Source port: 52580
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:0028:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
Blocked by UFW (TCP on 8008)
Source port: 53532
Packet length: 60
This report (for 2604:a940:0300:0 ...
show moreBlocked by UFW (TCP on 8008)
Source port: 53532
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:0028:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
Blocked by UFW (TCP on 465)
Source port: 54697
Packet length: 60
This report (for 2604:a940:0300:05 ...
show moreBlocked by UFW (TCP on 465)
Source port: 54697
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:0028:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
Blocked by UFW (TCP on 3975)
Source port: 52261
Packet length: 60
This report (for 2604:a940:0300:0 ...
show moreBlocked by UFW (TCP on 3975)
Source port: 52261
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:0028:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
SMTP Bruteforce. 2026-07-30T07:24:06.232715+02:00 *.* postfix/submission/smtpd[1930738]: improper co ...
show moreSMTP Bruteforce. 2026-07-30T07:24:06.232715+02:00 *.* postfix/submission/smtpd[1930738]: improper command pipelining after CONNECT from unknown[2604:a940:300:5b6:0:28::]: 0260030010053060010000053020030034240[327357240246i2720373233100047z353230247027Uz274G3370213247376370i267277 E316225260?215F247340023U304026fT3211772Fn027317G354332230254n2215016317000032300+300/300,3000314251314250300t300023300n300024023001
2026-07-30T07:24:06.720890+02:00 *.* postfix/submission/smtpd[1930738]: improper command pipelining after CONNECT from unknown[2604:a940:300:5b6:0:28::]: *`5aU321323274233021263313307Up363000000h314024314023300/300+3000300,300021300a300'300#300023300t300(300$300024300n314025000236000237000g000k00030009000234000235000005000004
show less
Blocked by UFW (TCP on 20257)
Source port: 52307
Packet length: 60
This report (for 2604:a940:0300: ...
show moreBlocked by UFW (TCP on 20257)
Source port: 52307
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:0028:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
Blocked by UFW (TCP on 56222)
Source port: 51330
Packet length: 60
This report (for 2604:a940:0300: ...
show moreBlocked by UFW (TCP on 56222)
Source port: 51330
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:0028:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
2026-07-29T08:14:39.733619+02:00 mx1 postfix/submission/smtpd[656169]: improper command pipelining a ...
show more2026-07-29T08:14:39.733619+02:00 mx1 postfix/submission/smtpd[656169]: improper command pipelining after CONNECT from unknown[2604:a940:300:5b6:0:28::]: \026\003\001\005\306\001\000\005\302\003\003\256\313\363)[-\340\031\355\276\321\364_\374U\217Rot\335\313\201\362=\271\270[\233cv'\305 \312\250C\220\200\302\330{`[lmj\277\334=\300)\314E\315kY\322\363C\314H\3721\246\326\000\032\300+\300/\300,\3000\314\251\314\250\300\t\300\023\300\n\300\024\023\001
show less
Blocked by UFW (TCP on 4100)
Source port: 56267
Packet length: 60
This report (for 2604:a940:0300:0 ...
show moreBlocked by UFW (TCP on 4100)
Source port: 56267
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:0028:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
Blocked by UFW (TCP on 21)
Source port: 54323
Packet length: 60
This report (for 2604:a940:0300:05b ...
show moreBlocked by UFW (TCP on 21)
Source port: 54323
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:0028:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
Port Scan
FTP Brute-Force
Brute-Force
Showing 1 to
15
of 269 reports
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reports reviewed and removed.
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