Это NAT провайдера.

nmap -O 217.112.214.234

Starting Nmap 4.76 ( http://nmap.org ) at 2011-06-12 06:49 GMT
Insufficient responses for TCP sequencing (3), OS detection may be less accurate
Interesting ports on mail.kh.epicentrk.com (217.112.214.234):
Not shown: 997 filtered ports
PORT STATE SERVICE
25/tcp open smtp
443/tcp open https
1723/tcp open pptp
Warning: OSScan results may be unreliable because we could not find at least 1 open and 1 closed port
Device type: firewall|general purpose|switch
Running (JUST GUESSING) : SonicWALL SonicOS 2.X (86%), FreeBSD 6.X (85%), OpenBSD 4.X (85%), HP embedded (85%)
Aggressive OS guesses: SonicWALL TZ 170 Standard firewall (86%), FreeBSD 6.2-RELEASE (85%), OpenBSD 4.3 (85%), HP 4000M ProCurve switch (J4121A) (85%)
No exact OS matches for host (test conditions non-ideal).

OS detection performed. Please report any incorrect results at http://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 82.67 seconds