Проверка портов утилитой Nmap

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установка на Centos:

dnf -y install nmap

установка на Linux Mint:

sudo apt -y install nmap

 

пример проверки SSH порта по сети:

sudo nmap -p 22 192.168.88.219

результат:

Starting Nmap 7.80 ( https://nmap.org ) at 2023-03-20 18:19 MSK
Nmap scan report for 192.168.88.219
Host is up (0.00050s latency).

PORT   STATE SERVICE
22/tcp open  ssh
MAC Address: B0:6E:BF:2B:EF:60 (Asustek Computer)

Nmap done: 1 IP address (1 host up) scanned in 0.30 seconds

 

пример проверки SIP пота UPD 5060 на хосте pbx.roistat.com:

sudo nmap -sU -p U:5060 pbx.roistat.com

результат успешный:

Starting Nmap 7.80 ( https://nmap.org ) at 2023-03-20 10:16 MSK
Nmap scan report for pbx.roistat.com (5.53.123.194)
Host is up (0.030s latency).

PORT     STATE         SERVICE
5060/udp open|filtered sip

Nmap done: 1 IP address (1 host up) scanned in 2.69 seconds

 

пример проверки SIP пота UPD 5060 на хосте reg.aa.mts.ru:

sudo nmap -sU -p U:5060 reg.aa.mts.ru

результат успешный:

Starting Nmap 7.80 ( https://nmap.org ) at 2023-03-20 10:17 MSK
Nmap scan report for reg.aa.mts.ru (212.188.36.179)
Host is up (0.030s latency).

PORT     STATE         SERVICE
5060/udp open|filtered sip

Nmap done: 1 IP address (1 host up) scanned in 2.79 seconds

 

Пример проверки SIP пота UPD 5060 на локальном адресе:

sudo nmap -sU -p U:5060 192.168.88.212

не успешный результат:

Starting Nmap 7.80 ( https://nmap.org ) at 2023-03-20 10:16 MSK
Nmap scan report for srv1c (192.168.88.212)
Host is up (0.00012s latency).

PORT     STATE    SERVICE
5060/udp filtered sip
MAC Address: FC:34:97:C0:AC:1C (Unknown)

Nmap done: 1 IP address (1 host up) scanned in 0.30 seconds

для поиска: linux проверить открытые порты udp на удаленной машине