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2604:a940:300:5b6:0:6::
Neutral Activity
There is no recent abuse activity, or the IP address is whitelisted.
Whitelisted Subnet
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.
IPv6 SLAAC Note
Public IPv6 addresses may implement the SLAAC
privacy extension. With SLAAC, the interface identifier is randomly generated. SLAAC also implements a
configurable time out, so that the original IPv6 interface addresses will be discarded in favor of a new
interface identifier.
2604:a940:300:5b6:0:6:: is an IP address from within our whitelist belonging to the subnet
2604:a940:300:5b6::/64,
which we identify as "Cortex Xpanse".
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IP Abuse Reports for 2604:a940:300:5b6:0:6:::
This IP address has been reported a total of
364
times from
11 distinct
sources.
2604:a940:300:5b6:0:6:: was first reported on
, and the most recent report was
.
In the last 60 days, the top reporter locations were:
United States of America
with 183
reports;
Germany
with 44
reports;
Netherlands
with 2
reports.
The most common categories in these recent reports were:
Port Scan
211
times;
Brute-Force
41
times;
Email Spam
5
times;
Web App Attack
5
times;
Bad Web Bot
2
times;
Other
2
times.
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.
SMTP Bruteforce. 2026-08-29T08:44:45.324829+02:00 *.* postfix/submission/smtpd[3752601]: improper co ...
show moreSMTP Bruteforce. 2026-08-29T08:44:45.324829+02:00 *.* postfix/submission/smtpd[3752601]: improper command pipelining after CONNECT from unknown[2604:a940:300:5b6:0:6::]: 026003001005306001000005302003003370037eU;001j/sAO026")211034347FO374,332V235L245y;D&303/ 3522422140162361227202Od241A005Y033254036274376b2000032457Uv-Y353k372331000032300+300/300,3000314251314250300t300023300n300024023001
2026-08-29T08:44:45.796090+02:00 *.* postfix/submission/smtpd[3752601]: improper command pipelining after CONNECT from unknown[2604:a940:300:5b6:0:6::]: 026003001000312001000000306003003:337234320215222017312211304313|375}246,|*~0236320000000h314024314023300/300+3000300,300021300a300'300#300023300t300(300$300024300n314025000236000237000g000k00030009000234000235000005000004
show less
Blocked by UFW (TCP on 8880)
Source port: 50466
Packet length: 60
This report (for 2604:a940:0300:0 ...
show moreBlocked by UFW (TCP on 8880)
Source port: 50466
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:0006:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
Blocked by UFW (TCP on 2086)
Source port: 55450
Packet length: 60
This report (for 2604:a940:0300:0 ...
show moreBlocked by UFW (TCP on 2086)
Source port: 55450
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:0006:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
Blocked by UFW (TCP on 44344)
Source port: 52398
Packet length: 60
This report (for 2604:a940:0300: ...
show moreBlocked by UFW (TCP on 44344)
Source port: 52398
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:0006:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
Blocked by UFW (TCP on 2096)
Source port: 53642
Packet length: 60
This report (for 2604:a940:0300:0 ...
show moreBlocked by UFW (TCP on 2096)
Source port: 53642
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:0006:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
Blocked by UFW (TCP on 28080)
Source port: 51625
Packet length: 60
This report (for 2604:a940:0300: ...
show moreBlocked by UFW (TCP on 28080)
Source port: 51625
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:0006:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
Blocked by UFW (TCP on 50997)
Source port: 49998
Packet length: 60
This report (for 2604:a940:0300: ...
show moreBlocked by UFW (TCP on 50997)
Source port: 49998
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:0006:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
Blocked by UFW (TCP on 5006)
Source port: 52993
Packet length: 60
This report (for 2604:a940:0300:0 ...
show moreBlocked by UFW (TCP on 5006)
Source port: 52993
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:0006:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
Blocked by UFW (TCP on 50805)
Source port: 50367
Packet length: 60
This report (for 2604:a940:0300: ...
show moreBlocked by UFW (TCP on 50805)
Source port: 50367
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:0006:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
Blocked by UFW (TCP on 2095)
Source port: 55733
Packet length: 60
This report (for 2604:a940:0300:0 ...
show moreBlocked by UFW (TCP on 2095)
Source port: 55733
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:0006:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
