This IP address has been reported a total of
27
times from
25 distinct
sources.
104.199.6.11 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.
2026-06-20T08:06:08.513332+00:00 s1.vvhsys.de postfix/postscreen[278060]: PREGREET 18 after 0.01 fro ...
show more2026-06-20T08:06:08.513332+00:00 s1.vvhsys.de postfix/postscreen[278060]: PREGREET 18 after 0.01 from [104.199.6.11]:19376: EHLO example.com\r\n
2026-06-20T08:06:08.648851+00:00 s1.vvhsys.de postfix/postscreen[278060]: PREGREET 1023 after 0 from [104.199.6.11]:19378: \026\003\001\005\304\001\000\005\300\003\003o]\3070h\235 \233s\2727\211\342\201\362\300A\323\246i\20
...
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Brute-Force
Anonymous
Kept connecting and disconnecting without issuing any commands
Fail2Ban report from jail 'pregreet': 2026-06-20T09:57:51.767922+02:00 mail postfix/postscreen[40964 ...
show moreFail2Ban report from jail 'pregreet': 2026-06-20T09:57:51.767922+02:00 mail postfix/postscreen[4096481]: PREGREET 18 after 0.02 from [104.199.6.11]:9190: EHLO example.com\r\n
...
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postfix Server DDoS - AUTH drops, early HANGUPs, other DDoS attacks, etc. Might contain brute-force ...
show morepostfix Server DDoS - AUTH drops, early HANGUPs, other DDoS attacks, etc. Might contain brute-force dictionary attack sightings on IMAP and SMTP.
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(eximsyntax) Exim syntax errors from 104.199.6.11 (BE/Belgium/Brussels Capital/Brussels/-/[AS396982 ...
show more(eximsyntax) Exim syntax errors from 104.199.6.11 (BE/Belgium/Brussels Capital/Brussels/-/[AS396982 GOOGLE-CLOUD-PLATFORM]): 1 in the last 86400 secs; Ports: *; Direction: inout; Trigger: LF_TRIGGER; Logs: 2026-06-20 08:23:13 SMTP call from 11.6.199.104.bc.googleusercontent.com [104.199.6.11]:17492 dropped: too many syntax or protocol errors (last command was "?\f?", NULL)
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(ftpd) Failed FTP login from 104.199.6.11 (BE/Belgium/Brussels Capital/Brussels/11.6.199.104.bc.goog ...
show more(ftpd) Failed FTP login from 104.199.6.11 (BE/Belgium/Brussels Capital/Brussels/11.6.199.104.bc.googleusercontent.com/[AS396982 Google LLC]): 1 in the last 3600 secs
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Ip 104.199.6.11 performed 'crowdsecurity/postfix-non-smtp-command' (1 events over 0s) at 2026-06-20 ...
show moreIp 104.199.6.11 performed 'crowdsecurity/postfix-non-smtp-command' (1 events over 0s) at 2026-06-20 03:56:09.072670325 +0000 UTC
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