No hostname found for IP address
Hi!,
We have a problem after upgrade to 74 version of Cpanel, when someone try to generate a conection SMTP to our server and the public IP that is trying to conect doesn't have a reverse DNS, an entrie of wrong syntax is record. LF_EXIMSYNTAX is configurated with 10. After complete 10 access, the ip is blocked. someone have this same problem?
This is one "block", the ip is in our white list, but if isn't, this would be blocked.
I don't want to do it, but we can ignore this syntax error?
Time: Thu Aug 9 18:11:01 2018 -0400
IP: 200.111.xxx.xxx (CL/Chile/-)
Failures: 10 (eximsyntax)
Interval: 3600 seconds
Blocked: Permanent Block [LF_EXIMSYNTAX] (IP match in csf.allow, block may not work)
Log entries:
2018-08-09 17:21:06 no host name found for IP address 200.111.xxx.xxx
2018-08-09 17:33:50 no host name found for IP address 200.111.xxx.xxx
2018-08-09 17:39:17 no host name found for IP address 200.111.xxx.xxx
2018-08-09 17:40:33 no host name found for IP address 200.111.xxx.xxx
2018-08-09 17:43:39 no host name found for IP address 200.111.xxx.xxx
2018-08-09 17:52:03 no host name found for IP address 200.111.xxx.xxx
2018-08-09 17:59:28 no host name found for IP address 200.111.xxx.xxx
2018-08-09 17:59:50 no host name found for IP address 200.111.xxx.xxx
2018-08-09 18:06:37 no host name found for IP address 200.111.xxx.xxx
2018-08-09 18:10:59 no host name found for IP address 200.111.xxx.xxx
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LF_EXIMSYNTAX
This item was removed in todays CSF update acording to the ConfigServer blog: New csf v12.06 | ConfigServer Services Blog0 -
Thanks!!! i compare the line in 12.05 i found if (($config{LF_EXIMSYNTAX}) and ($globlogs{SMTPAUTH_LOG}{$lgfile}) and ($line =~ /^S+s+S+s+([d+] )?no host name found for IP address (S+)/)) { my $ip = $2; my $acc = ""; $ip =~ s/^::ffff://; if (checkip($ip)) {return ("Exim syntax errors from","$ip|$acc","eximsyntax")} else {return} } This was removed in the 12.06 version I'm upgrading all my CSF. Thanks again!! 0
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