Hi,
a short report from our cluster:
Every system has been hit with this "test" :
2023-10-02 04:48:31 SMTP call from (hello) [152.32.233.30] dropped: too
many syntax or protocol errors (last command was "AUTH NTLM
TlRMTVNTUAABAAAAB4IIAAAAAAAAAAAAAAAAAAAAAAA=", C=EHLO,HELP,AUTH)
"TlRMTVNTUAABAAAAB4IIAAAAAAAAAAAAAAAAAAAAAAA=" decodes to "NTLMSSP"
They try it with and without the base64 string:
2023-10-02 03:45:48 SMTP call from (XXXXXXXXXXX) [152.32.132.194]
dropped: too many syntax or protocol errors (last command was "AUTH
NTLM", C=EHLO,AUTH)
AUTH NTLM and EXTERNAL are not supported by Exims default config in
Fedora, which leads to the above message if a "no errors allowed" policy
is in place.
"AUTH EXTERNAL" has not been tested and other attempts could not be
identified yet.
best regards,
Marius
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