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Открытие порта в iptables [дубликат]

-1
23.05.2018, 11:29
1 ответ

Tiene que haber algo escuchando en el puerto, abrir el firewall por sí solo no lo abre.

Aquí httpd está escuchando en 80, por lo que se muestra abierto 

$ nmap localhost -p 80

Starting Nmap 6.40 ( http://nmap.org ) at 2018-05-22 19:22 MDT
Nmap scan report for localhost (127.0.0.1)
Host is up (0.00019s latency).
Other addresses for localhost (not scanned): 127.0.0.1
PORT   STATE SERVICE
80/tcp open  http

Nmap done: 1 IP address (1 host up) scanned in 0.18 seconds

Aquí netstat muestra que estoy escuchando en 80, porque httpd está escuchando en él. 

$ netstat --listening --numeric-ports | grep 80
tcp6       0      0 [::]:80                 [::]:*                  LISTEN

$ systemctl status httpd
● httpd.service - The Apache HTTP Server
   Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; vendor preset: disabled)
   Active: active (running) since Tue 2018-05-22 18:18:01 MDT; 1h 5min ago
     Docs: man:httpd(8)
           man:apachectl(8)
 Main PID: 1279 (httpd)
   Status: "Total requests: 0; Current requests/sec: 0; Current traffic:   0 B/sec"
    Tasks: 7
   CGroup: /system.slice/httpd.service
           ├─1279 /usr/sbin/httpd -DFOREGROUND
           ├─1928 /usr/sbin/httpd -DFOREGROUND
           ├─1929 /usr/sbin/httpd -DFOREGROUND
           ├─1930 /usr/sbin/httpd -DFOREGROUND
           ├─1931 /usr/sbin/httpd -DFOREGROUND
           ├─1932 /usr/sbin/httpd -DFOREGROUND
           └─1933 /usr/sbin/httpd -DFOREGROUND

May 22 18:17:55 trogdor.mydomain.com systemd[1]: Starting The Apache HTT...
May 22 18:18:01 trogdor.mydomain.com systemd[1]: Started The Apache HTTP...
Hint: Some lines were ellipsized, use -l to show in full.

Si cierro httpd:

# systemctl stop httpd 
$ nmap localhost -p 80

Starting Nmap 6.40 ( http://nmap.org ) at 2018-05-22 19:23 MDT
Nmap scan report for localhost (127.0.0.1)
Host is up (0.00017s latency).
Other addresses for localhost (not scanned): 127.0.0.1
PORT   STATE  SERVICE
80/tcp closed http

Nmap done: 1 IP address (1 host up) scanned in 0.13 seconds

Netstat muestra que no estoy escuchando en 80, aunque está abierto 

$ netstat --listening --numeric-ports | grep 80
$

El punto es que la parte de IPTables es un XyProblem . Si inicio un oyente de conexión inversa -en 4444, (esto se toma de Rapid7 Q&A ), luego el puerto 4444 se muestra como abierto y escuchando y nunca tengo que tocar las tablas de IP. 

msf > use exploit/multi/handler
msf exploit(handler) > set PAYLOAD windows/meterpreter/reverse_tcp
msf exploit(handler) > set LHOST 127.0.0.1
msf exploit(handler) > set LPORT 4444
msf exploit(handler) > set ExitOnSession false
msf exploit(handler) > exploit -j

# netstat --numeric-ports --listening | grep 4444
tcp        0      0 localhost:4444          0.0.0.0:*
2
28.01.2020, 05:08

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