Is there something I should be doing to mitigate this problem? Oct 8 02:11:42 myserver postfix/smtpd[11630]: connect from unknown[180.123.163.212] Oct 8 02:11:43 myserver postfix/smtpd[11632]: connect from unknown[180.123.163.212] Oct 8 02:11:43 myserver postfix/smtpd[11632]: lost connection after EHLO from unknown[180.123.163.212] Oct 8 02:11:43 myserver postfix/smtpd[11632]: disconnect from unknown[180.123.163.212] ehlo=1 commands=1 Oct 8 02:11:44 myserver postfix/smtpd[11632]: connect from unknown[180.123.163.212] Oct 8 02:11:45 myserver postfix/smtpd[11632]: lost connection after EHLO from unknown[180.123.163.212] Oct 8 02:11:45 myserver postfix/smtpd[11632]: disconnect from unknown[180.123.163.212] ehlo=1 commands=1 Oct 8 02:11:45 myserver postfix/smtpd[11632]: connect from unknown[180.123.163.212] Oct 8 02:11:46 myserver postfix/smtpd[11632]: lost connection after EHLO from unknown[180.123.163.212] Oct 8 02:11:46 myserver postfix/smtpd[11632]: disconnect from unknown[180.123.163.212] ehlo=1 commands=1 Oct 8 02:11:46 myserver postfix/smtpd[11630]: lost connection after CONNECT from unknown[180.123.163.212] Oct 8 02:11:46 myserver postfix/smtpd[11630]: disconnect from unknown[180.123.163.212] commands=0/0 Oct 8 02:11:46 myserver postfix/smtpd[11632]: connect from unknown[180.123.163.212] Oct 8 02:11:47 myserver postfix/smtpd[11632]: lost connection after EHLO from unknown[180.123.163.212] Oct 8 02:11:47 myserver postfix/smtpd[11632]: disconnect from unknown[180.123.163.212] ehlo=1 commands=1 Oct 8 02:11:47 myserver postfix/smtpd[11630]: connect from unknown[180.123.163.212] Oct 8 02:11:48 myserver postfix/smtpd[11630]: lost connection after EHLO from unknown[180.123.163.212] Oct 8 02:11:48 myserver postfix/smtpd[11630]: disconnect from unknown[180.123.163.212] ehlo=1 commands=1 Oct 8 02:11:48 myserver postfix/smtpd[11632]: connect from unknown[180.123.163.212] Oct 8 02:11:48 myserver postfix/smtpd[11632]: lost connection after EHLO from unknown[180.123.163.212] Oct 8 02:11:48 myserver postfix/smtpd[11632]: disconnect from unknown[180.123.163.212] ehlo=1 commands=1 Oct 8 02:11:50 myserver postfix/smtpd[11630]: connect from unknown[180.123.163.212] Oct 8 02:11:53 myserver postfix/smtpd[11630]: lost connection after EHLO from unknown[180.123.163.212] Oct 8 02:11:53 myserver postfix/smtpd[11630]: disconnect from unknown[180.123.163.212] ehlo=1 commands=1 Oct 8 02:11:54 myserver postfix/smtpd[11632]: connect from unknown[180.123.163.212] Oct 8 02:11:54 myserver postfix/smtpd[11632]: lost connection after EHLO from unknown[180.123.163.212] Oct 8 02:11:54 myserver postfix/smtpd[11632]: disconnect from unknown[180.123.163.212] ehlo=1 commands=1 Oct 8 02:11:54 myserver postfix/smtpd[11630]: connect from unknown[180.123.163.212] Oct 8 02:11:55 myserver postfix/smtpd[11630]: lost connection after EHLO from unknown[180.123.163.212] Oct 8 02:11:55 myserver postfix/smtpd[11630]: disconnect from unknown[180.123.163.212] ehlo=1 commands=1 Oct 8 02:11:55 myserver postfix/smtpd[11632]: connect from unknown[180.123.163.212] Oct 8 02:11:55 myserver postfix/smtpd[11632]: warning: Connection rate limit exceeded: 11 from unknown[180.123.163.212] for service smtp Oct 8 02:11:55 myserver postfix/smtpd[11632]: disconnect from unknown[180.123.163.212] commands=0/0 Oct 8 02:11:55 myserver postfix/smtpd[11630]: connect from unknown[180.123.163.212] Oct 8 02:11:55 myserver postfix/smtpd[11630]: warning: Connection rate limit exceeded: 12 from unknown[180.123.163.212] for service smtp Oct 8 02:11:55 myserver postfix/smtpd[11630]: disconnect from unknown[180.123.163.212] commands=0/0 Oct 8 02:15:15 myserver postfix/anvil[11633]: statistics: max connection rate 12/60s for (smtp:180.123.163.212) at Oct 8 02:11:55 Oct 8 02:15:15 myserver postfix/anvil[11633]: statistics: max connection count 2 for (smtp:180.123.163.212) at Oct 8 02:11:43 Oct 8 02:15:15 myserver postfix/anvil[11633]: statistics: max cache size 1 at Oct 8 02:11:42
------------------------------------- postconf mail_version mail_version = 3.5.7 ------------------------------------ smtpd_client_auth_rate_limit = 20 smtpd_client_connection_count_limit = 10 smtpd_client_connection_rate_limit = 10 smtpd_client_new_tls_session_rate_limit = 3 smtpd_client_recipient_rate_limit = 40 smtpd_client_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination, check_reverse_client_hostname_access pcre:/etc/postfix/fqrdns.pcre, reject_unknown_reverse_client_hostname, check_client_access hash:/etc/postfix/spamsources smtpd_error_sleep_time = 2s smtpd_hard_error_limit = 6 smtpd_helo_required = yes smtpd_milters = inet:127.0.0.1:8891, inet:127.0.0.1:8893 smtpd_recipient_limit = 20 smtpd_recipient_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination, reject_unauth_pipelining, reject_non_fqdn_sender, reject_unknown_sender_domain, reject_unknown_recipient_domain, reject_non_fqdn_recipient, check_client_access hash:/etc/postfix/client_checks, check_sender_access hash:/etc/postfix/sender_checks, reject_rbl_client bl.spamcop.net, reject_rbl_client b.barracudacentral.org, reject_rbl_client cbl.abuseat.org, reject_rbl_client rabl.nuclearelephant.com, reject_rbl_client zen.spamhaus.org, check_policy_service unix:private/policy smtpd_relay_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination, check_policy_service unix:private/policy smtpd_sasl_auth_enable = yes smtpd_sasl_path = private/auth smtpd_sasl_security_options = noanonymous smtpd_sasl_type = dovecot smtpd_sender_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination, reject_unknown_address, check_sender_access hash:/etc/postfix/spamsources smtpd_soft_error_limit = 3 --------- Linux 3.10.0-1127.19.1.el7.x86_64 #1 SMP Tue Aug 25 17:23:54 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
