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SOLVED No hostname found for IP address

Discussion in 'E-mail Discussion' started by Orlando Pulgar, Aug 10, 2018.

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  1. Orlando Pulgar

    Orlando Pulgar Registered

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    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
     
    #1 Orlando Pulgar, Aug 10, 2018
    Last edited by a moderator: Aug 10, 2018
  2. Infopro

    Infopro cPanel Sr. Product Evangelist
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  3. Orlando Pulgar

    Orlando Pulgar Registered

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    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!!
     
    Infopro likes this.
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