Впоследствии я выполнил те же команды nmap и получил два набора результатов.
Я знаю, что есть три открытых порта, но при каждом запуске отображаются только два.
Кто-нибудь может объяснить эти результаты?
ramses@deimos:~/$ nmap -p 50000-60000 some-server
Starting Nmap 6.40 ( http://nmap.org ) at 2015-07-11 14:00 VET
Nmap scan report for some-server (some-internet-ip)
Host is up (0.075s latency).
Not shown: 9999 filtered ports
PORT STATE SERVICE
53409/tcp open unknown
56475/tcp open unknown
Nmap done: 1 IP address (1 host up) scanned in 45.94 seconds
ramses@deimos:~/$ nmap -p 50000-60000 some-server
Starting Nmap 6.40 ( http://nmap.org ) at 2015-07-11 14:01 VET
Nmap scan report for some-server (some-internet-ip)
Host is up (0.078s latency).
Not shown: 9999 filtered ports
PORT STATE SERVICE
53409/tcp open unknown
54514/tcp open unknown
Nmap done: 1 IP address (1 host up) scanned in 67.51 seconds
ramses@deimos:~/$ nmap -p 50000-60000 some-server
Starting Nmap 6.40 ( http://nmap.org ) at 2015-07-11 14:06 VET
Nmap scan report for some-server (some-internet-ip)
Host is up (0.075s latency).
Not shown: 9999 filtered ports
PORT STATE SERVICE
53409/tcp open unknown
56475/tcp open unknown
Nmap done: 1 IP address (1 host up) scanned in 64.02 seconds
ramses@deimos:~/$ nmap -p 50000-60000 some-server
Starting Nmap 6.40 ( http://nmap.org ) at 2015-07-11 14:08 VET
Nmap scan report for some-server (some-internet-ip)
Host is up (0.075s latency).
Not shown: 9999 filtered ports
PORT STATE SERVICE
53409/tcp open unknown
54514/tcp open unknown
Nmap done: 1 IP address (1 host up) scanned in 58.14 seconds