spamdyke won't log the IP in its current version, but it wouldn't be hard to
add. If you want a quick'n'dirty solution right away, you can add it very
easily... just edit exec.c and change line 206 to this:
SPAMDYKE_LOG_VERBOSE(current_settings, LOG_VERBOSE_AUTH_FAILURE "%s
%s", username, current_settings->server_ip);
Then recompile and replace the spamdyke binary with the new copy. Once it's in
place, the "authentication failure" messages should show the IP address right
after the username, separated by a space. (NOTE: I haven't compiled or tested
this change, proceed with caution...)
-- Sam Clippinger
On Jul 22, 2016, at 6:17 PM, Gary Gendel via spamdyke-users
<spamdyke-users@spamdyke.org> wrote:
> Sam,
>
> Is there a way to get spamdyke to log invalid authorizations in a manner that
> fail2ban can use? My host has been hit continuously with brute-force
> attacks. Unfortunately, the logs only have:
>
> Jul 22 18:54:43 tardis spamdyke[26727]: [ID 702911 mail.info]
> FILTER_AUTH_REQUIRED
> Jul 22 18:54:50 tardis spamdyke[26727]: [ID 702911 mail.info]
> ERROR(exec_checkpassword_argv()@exec.c:206): authentication failure (bad
> username/password, vchkpw uses this to indicate SMTP access is not allowed):
> verizon
> Jul 22 18:56:01 tardis spamdyke[26727]: [ID 702911 mail.info]
> ERROR(tls_read()@tls.c:620): unable to read from SSL/TLS stream: The
> operation failed due to an I/O error, Unexpected EOF found
> Jul 22 18:57:16 tardis spamdyke[26736]: [ID 702911 mail.info]
> FILTER_AUTH_REQUIRED
> Jul 22 18:57:23 tardis spamdyke[26736]: [ID 702911 mail.info]
> ERROR(exec_checkpassword_argv()@exec.c:206): authentication failure (bad
> username/password, vchkpw uses this to indicate SMTP access is not allowed):
> verizon
> Jul 22 18:58:37 tardis spamdyke[26736]: [ID 702911 mail.info]
> ERROR(tls_read()@tls.c:620): unable to read from SSL/TLS stream: The
> operation failed due to an I/O error, Unexpected EOF found
> Jul 22 18:59:59 tardis spamdyke[26743]: [ID 702911 mail.info]
> FILTER_AUTH_REQUIRED
> Jul 22 19:00:10 tardis spamdyke[26743]: [ID 702911 mail.info]
> ERROR(exec_checkpassword_argv()@exec.c:206): authentication failure (bad
> username/password, vchkpw uses this to indicate SMTP access is not allowed):
> verizon
> Jul 22 19:01:21 tardis spamdyke[26743]: [ID 702911 mail.info]
> ERROR(tls_read()@tls.c:620): unable to read from SSL/TLS stream: The
> operation failed due to an I/O error, Unexpected EOF found
> Jul 22 19:02:32 tardis spamdyke[26876]: [ID 702911 mail.info]
> FILTER_AUTH_REQUIRED
> Jul 22 19:02:38 tardis spamdyke[26876]: [ID 702911 mail.info]
> ERROR(exec_checkpassword_argv()@exec.c:206): authentication failure (bad
> username/password, vchkpw uses this to indicate SMTP access is not allowed):
> verizon
> Jul 22 19:03:50 tardis spamdyke[26876]: [ID 702911 mail.info]
> ERROR(tls_read()@tls.c:620): unable to read from SSL/TLS stream: The
> operation failed due to an I/O error, Unexpected EOF found
> \Jul 22 19:05:11 tardis spamdyke[26891]: [ID 702911 mail.info]
> FILTER_AUTH_REQUIRED
> Jul 22 19:05:16 tardis spamdyke[26891]: [ID 702911 mail.info]
> ERROR(exec_checkpassword_argv()@exec.c:206): authentication failure (bad
> username/password, vchkpw uses this to indicate SMTP access is not allowed):
> verizon
>
> They seem to have a huge list of account names to try and I've got thousands
> of attempts just for today. Unfortunately, without any IP address in the
> message I can't have fail2ban automatically block these.
>
> Gary
>
>
> _______________________________________________
> spamdyke-users mailing list
> spamdyke-users@spamdyke.org
> http://www.spamdyke.org/mailman/listinfo/spamdyke-users
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