[g@localhost eps2]# nslookup smtp.rambler.ru
Server: 192.168.1.1
Address: 192.168.1.1#53
Non-authoritative answer:
Name: smtp.rambler.ru
Address: 81.19.77.166
Name: smtp.rambler.ru
Address: 81.19.77.164
Name: smtp.rambler.ru
Address: 81.19.77.165
Name: smtp.rambler.ru
Address: 81.19.77.167
[root@localhost eps2]# nmap -A -O -T4 81.19.77.166
Starting Nmap 6.40 ( http://nmap.org ) at 2014-07-27 14:42 BST
Nmap scan report for smtp.rambler.ru (81.19.77.166)
Host is up (0.10s latency).
Not shown: 991 filtered ports
PORT STATE SERVICE VERSION
25/tcp open smtp Symantec Enterprise Security manager smtpd
|_smtp-commands: mail.rambler.ru, SIZE 31457280, ENHANCEDSTATUSCODES, 8BITMIME, AUTH PLAIN LOGIN CRAM-MD5, STARTTLS,
| ssl-cert: Subject: commonName=*.rambler.ru/organizationName=Rambler Internet Holdings, LLC/stateOrProvinceName=Moscow/countryName=RU
| Not valid before: 2013-09-04T23:00:00+00:00
|_Not valid after: 2014-10-05T22:59:59+00:00
|_ssl-date: 2014-07-27T20:45:11+00:00; +7h00m08s from local time.
53/tcp closed domain
110/tcp closed pop3
143/tcp closed imap
465/tcp open ssl/smtp Symantec Enterprise Security manager smtpd
|_smtp-commands: mail.rambler.ru, SIZE 31457280, ENHANCEDSTATUSCODES, 8BITMIME, AUTH PLAIN LOGIN CRAM-MD5,
| ssl-cert: Subject: commonName=*.rambler.ru/organizationName=Rambler Internet Holdings, LLC/stateOrProvinceName=Moscow/countryName=RU
| Not valid before: 2013-09-04T23:00:00+00:00
|_Not valid after: 2014-10-05T22:59:59+00:00
|_ssl-date: 2014-07-27T20:45:10+00:00; +7h00m08s from local time.
587/tcp open smtp Symantec Enterprise Security manager smtpd
|_smtp-commands: mail.rambler.ru, SIZE 31457280, ENHANCEDSTATUSCODES, 8BITMIME, AUTH PLAIN LOGIN CRAM-MD5, STARTTLS,
| ssl-cert: Subject: commonName=*.rambler.ru/organizationName=Rambler Internet Holdings, LLC/stateOrProvinceName=Moscow/countryName=RU
| Not valid before: 2013-09-04T23:00:00+00:00
|_Not valid after: 2014-10-05T22:59:59+00:00
|_ssl-date: 2014-07-27T20:45:11+00:00; +7h00m08s from local time.
993/tcp closed imaps
995/tcp closed pop3s
2525/tcp open smtp Symantec Enterprise Security manager smtpd
|_smtp-commands: mail.rambler.ru, SIZE 31457280, ENHANCEDSTATUSCODES, 8BITMIME, AUTH PLAIN LOGIN CRAM-MD5, STARTTLS,
Device type: general purpose
Running (JUST GUESSING): Linux 3.X|2.6.X (87%)
OS CPE: cpe:/o:linux:linux_kernel:3 cpe:/o:linux:linux_kernel:2.6
Aggressive OS guesses: Linux 3.2 - 3.6 (87%), Linux 2.6.32 (86%), Linux 3.4 (85%), Linux 3.6 (85%), Linux 2.6.39 (85%)
No exact OS matches for host (test conditions non-ideal).
Network Distance: 15 hops
Service Info: Host: mail.rambler.ru