Reverse DNS testing

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



I want to do a rDNS check on a admin entered host name to insure in-coming mail servers don't reject mail, sent by my app, because the rDNS doesn't exist or doesn't match.

Here is the fundamental code:

$host = $_SERVER['SERVER_NAME']; //site name shared or not
$ip = gethostbyname($host);

$hostName = gethostbyaddr($ip); //May be different on a shared host
$ip2 = gethostbyname($hostName);

The $ip works fine.

However, one of the shared hosts I'm working with returns this instead of the original $host

gethostbyaddr($ip)=> 93.247.128.148-static.foo.com [foo is subs for actual]

gethostbyname($hostName)=> 93.247.128.148-static.foo.com  It appears
gethostbyname() is just returning $hostName because it is not legit.
Using just the foo.com in gethostbyname() returns the host's server IP.

Thus, the typical rDNS check fails for this site. Several online checks also report rDNS fails.

Any suggestions how I can handle this?


--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php



[Index of Archives]     [PHP Home]     [Apache Users]     [PHP on Windows]     [Kernel Newbies]     [PHP Install]     [PHP Classes]     [Pear]     [Postgresql]     [Postgresql PHP]     [PHP on Windows]     [PHP Database Programming]     [PHP SOAP]

  Powered by Linux