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:a940:300:5b6:0:2a:: is an IP address from within our whitelist belonging to the subnet
2604:a940:300:5b6::/64,
which we identify as "Cortex Xpanse".
This IP address has been reported a total of
524
times from
12 distinct
sources.
2604:a940:300:5b6:0:2a:: 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 149
reports;
Germany
with 35
reports;
Netherlands
with 2
reports.
The most common categories in these recent reports were:
Port Scan
173
times;
Brute-Force
38
times;
Bad Web Bot
3
times;
Email Spam
3
times;
Web App Attack
3
times;
Other
4
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.
Blocked by UFW (TCP on 9595)
Source port: 56586
Packet length: 60
This report (for 2604:a940:0300:0 ...
show moreBlocked by UFW (TCP on 9595)
Source port: 56586
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:002a:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
Blocked by UFW (TCP on 40000)
Source port: 55452
Packet length: 60
This report (for 2604:a940:0300: ...
show moreBlocked by UFW (TCP on 40000)
Source port: 55452
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:002a:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
Blocked by UFW (TCP on 8083)
Source port: 50020
Packet length: 60
This report (for 2604:a940:0300:0 ...
show moreBlocked by UFW (TCP on 8083)
Source port: 50020
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:002a:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
Blocked by UFW (TCP on 8282)
Source port: 54685
Packet length: 60
This report (for 2604:a940:0300:0 ...
show moreBlocked by UFW (TCP on 8282)
Source port: 54685
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:002a:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
Blocked by UFW (TCP on 4117)
Source port: 51352
Packet length: 60
This report (for 2604:a940:0300:0 ...
show moreBlocked by UFW (TCP on 4117)
Source port: 51352
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:002a:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
2026-10-19T11:06:43.948978+02:00 srv02 postfix/submission/smtpd[2251415]: improper command pipelinin ...
show more2026-10-19T11:06:43.948978+02:00 srv02 postfix/submission/smtpd[2251415]: improper command pipelining after CONNECT from unknown[2604:a940:300:5b6:0:2a::]: \026\003\001\005\306\001\000\005\302\003\003qbn\030\303\266\231;\346\3511\246pp.m~\320R%\317\212'\212\245\205.\277f\323\022\311 \245\353\264\331QM+P\206sZ\320p\202=E\006\235t\352j\177\2414u\365=o\243\241\363\360\000\032\300+\300/\300,\3000\314\251\314\250\300\t\300\023\300\n\300\024\023\001
2026-10-19T11:06:48.351973+02:00 srv02 postfix/submission/smtpd[2252290]: improper command pipelining after CONNECT from unknown[2604:a940:300:5b6:0:2a::]: \026\003\001\000\312\001\000\000\306\003\003\352\332ME\345\235\267\324\351c\026\200\2719E\266\036\310\343w0\327\t'\237G?\326~\n\203\342\000\000h\314\024\314\023\300/\300+\3000\300,\300\021\300\a\300'\300#\300\023\300\t\300(\300$\300\024\300\n\314\025\000\236\000\237\000g\000k\0003\0009\000\234\000\235\000\005\000\004
2026-10-19T11:06:49.949776+02:00 srv02 postfix/submission/smtpd[2251415]: los
...
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Blocked by UFW (TCP on 11495)
Source port: 50127
Packet length: 60
This report (for 2604:a940:0300: ...
show moreBlocked by UFW (TCP on 11495)
Source port: 50127
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:002a:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
Blocked by UFW (TCP on 8005)
Source port: 49526
Packet length: 60
This report (for 2604:a940:0300:0 ...
show moreBlocked by UFW (TCP on 8005)
Source port: 49526
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:002a:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
Blocked by UFW (TCP on 8310)
Source port: 52845
Packet length: 60
This report (for 2604:a940:0300:0 ...
show moreBlocked by UFW (TCP on 8310)
Source port: 52845
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:002a:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
Blocked by UFW (TCP on 9443)
Source port: 53187
Packet length: 60
This report (for 2604:a940:0300:0 ...
show moreBlocked by UFW (TCP on 9443)
Source port: 53187
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:002a:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
Blocked by UFW (TCP on 21)
Source port: 51025
Packet length: 60
This report (for 2604:a940:0300:05b ...
show moreBlocked by UFW (TCP on 21)
Source port: 51025
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:002a:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
Blocked by UFW (TCP on 56222)
Source port: 52511
Packet length: 60
This report (for 2604:a940:0300: ...
show moreBlocked by UFW (TCP on 56222)
Source port: 52511
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:002a:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
Blocked by UFW (TCP on 9092)
Source port: 50731
Packet length: 60
This report (for 2604:a940:0300:0 ...
show moreBlocked by UFW (TCP on 9092)
Source port: 50731
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:002a:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
