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# nmap -O linux.org.ru

Starting Nmap 5.00 ( http://nmap.org ) at 2012-05-01 20:16 EDT
Interesting ports on linux.org.ru (217.76.32.61):
Not shown: 984 closed ports
PORT     STATE    SERVICE
21/tcp   open     ftp
22/tcp   open     ssh
25/tcp   open     smtp
53/tcp   open     domain
80/tcp   open     http
110/tcp  open     pop3
111/tcp  open     rpcbind
143/tcp  open     imap
443/tcp  open     https
465/tcp  open     smtps
993/tcp  open     imaps
995/tcp  open     pop3s
3306/tcp filtered mysql
5432/tcp filtered postgresql
8080/tcp open     http-proxy
8443/tcp open     https-alt
Device type: general purpose|WAP|broadband router|router|printer|firewall
Running (JUST GUESSING) : Linux 2.6.X|2.4.X (90%), Linksys Linux 2.4.X (90%), D-Link embedded (87%), Linksys embedded (87%), Peplink embedded (87%), Lexmark embedded (86%), Check Point Linux 2.4.X (85%)
Aggressive OS guesses: Linux 2.6.22 (Fedora Core 6) (90%), OpenWrt White Russian 0.9 (Linux 2.4.30) (90%), OpenWrt 0.9 - 7.09 (Linux 2.4.30 - 2.4.34) (90%), OpenWrt Kamikaze 7.09 (Linux 2.6.22) (90%), Linux 2.6.9 - 2.6.18 (87%), OpenWrt Kamikaze 8.09 (Linux 2.6.25 - 2.6.26) (87%), D-Link DSA-3100 or Linksys WRT54GL (DD-WRT v23) WAP, or Peplink Balance 30 router (87%), Linux 2.6.20 - 2.6.25 (87%), Linux 2.6.21 (87%), Linux 2.6.22 (87%)
No exact OS matches for host (test conditions non-ideal).
Network Distance: 9 hops

OS detection performed. Please report any incorrect results at http://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 6.24 seconds