Tag: nmap

How to convert CIDR to IP Range using nmap command

1376  admin  
nmap -sL 10.0.0.12/28 | grep "Nmap scan report"

Nmap scan report for 10.0.0.0
Nmap scan report for 10.0.0.1
Nmap scan report for 10.0.0.2
Nmap scan report for 10.0.0.3
Nmap scan report for 10.0.0.4
Nmap scan report for 10.0.0.5
Nmap scan report for 10.0.0.6
Nmap scan report for 10.0.0.7
Nmap scan report for 10.0.0.8
Nmap scan report for 10.0.0.9
Nmap scan report for 10.0.0.10
Nmap scan report for 10.0.0.11
Nmap scan report for 10.0.0.12
Nmap scan report for 10.0.0.13
Nmap scan report for 10.0.0.14
Nmap scan report for 10.0.0.15

nmap -sL 10.0.0.12/28 | grep "Nmap scan report" |grep -Eo '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}'
… Read the rest

Useful nmap command

1325  admin  
(last edited )

Traceroute to IP address

nmap -sn --traceroute remoteipaddress

Traceroute to port

nmap -Pn --traceroute -p 443 remoteipaddress

Output:

PORT STATE SERVICE
443/tcp open https

Open means its ok

PORT STATE SERVICE
443/tcp filtered https

Filtered means that a firewall or some filtering or other network issue is covering the port and preventing nmap from determining if the port is open.… Read the rest

How to create port listener on Linux

1141  admin  
(last edited )

Install nc if needed

yum install nc

Run listener on port 3000

nc -l 3000 &
nc -l -k 3000 &

where -k is –keep-open will keep connection opened and allows multiple connections in listen mode

Check on the server’s side:

netstat -tunap |grep :3000

Output:

tcp        0      0 0.0.0.0:3000                0.0.0.0:*                   LISTEN      82786/nc

Check from local machine:

$ nmap -p 3000 SERVERS_IP_ADDRESS

Output:

Starting Nmap 7.01 ( https://nmap.org
… Read the rest