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Become a patron and gain access to the dashboard, Schedule scans, API and Search patron
Free online port scanner using online nmap's advanced port scanning tool to detect services including down and up hosts.
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This tool is intended to help system administrators and other security researchers assess external threats on the systems they OWN. Effective use of Nmap can protect your system network from intruders. So please ensure you are AUTHORIZED to perform scan.
To perform nmap top port scan you just have to issue this command
nmap nmmapper.com --top-ports 10
For simplicity in hosting this nmap tool, we decided to build a simple python3-nmap scanner with all nmap command and args defined as python function. This tool is still under development and not all nmap commands are available there.
Read it's Docs The script is really easy to use just like this
import nmap3
nmap = nmap3.Nmap()
result = nmap.nmap_version_detection("nmmapper.com")
# This is equivalent to nmap's
nmap nmmapper.com -sV
You can find more about this script at it's github-repository
Or Read the docs all still in development
Testing Whether Nmap is Already Installed
$ nmap --version
Nmap version 7.60 ( https://nmap.org )
Platform: x86_64-pc-linux-gnu
Compiled with: liblua-5.3.3 openssl-1.1.0g nmap-libssh2-1.8.0 libz-1.2.8 libpcre-8.39 libpcap-1.8.1 nmap-libdnet-1.12 ipv6
Compiled without:
Available nsock engines: epoll poll select
# This is on linux.
This options summary is printed when Nmap is run with no arguments, and the latest version is always available . It helps people remember the most common options, but is no substitute for the in-depth documentation in the rest of this manual.
#
$ nmap
#
# When you type nmap without any option or argument you get a summar
Nmap 7.60 ( https://nmap.org )
Usage: nmap [Scan Type(s)] [Options] {target specification}
TARGET SPECIFICATION:
Can pass hostnames, IP addresses, networks, etc.
Ex: scanme.nmap.org, microsoft.com/24, 192.168.0.1; 10.0.0-255.1-254
-iL <inputfilename>: Input from list of hosts/networks
-iR <num hosts>: Choose random targets
--exclude <host1[,host2][,host3],...>: Exclude hosts/networks
--excludefile <exclude_file>: Exclude list from file
HOST DISCOVERY:
.....
Everything on the command-line that isn't an option (or option argument) is treated as a target host specification. The simplest case is to specify a target IP address or hostname for scanning.
When a hostname is given as a target, it is resolved via the Domain Name System (DNS) to determine the IP address to scan. If the name resolves to more than one IP address, only the first one will be scanned. To make Nmap scan all the resolved addresses instead of only the first one, use the --resolve-all
option
#
$ nmap -iL <inputfilename> # (Input from list)
#
$ nmap -iR <num hosts> # (Choose random targets)
#
$ nmap --exclude <host1>[,<host2>[,...]] # (Exclude hosts/networks)
#
$ nmap --excludefile <exclude_file> # (Exclude list from file)
One of the very first steps in any network reconnaissance mission is to reduce a (sometimes huge) set of IP ranges into a list of active or interesting hosts. Scanning every port of every single IP address is slow and usually unnecessary. Of course what makes a host interesting depends greatly on the scan purposes. Network administrators may only be interested in hosts running a certain service, while security auditors may care about every single device with an IP address. An administrator may be comfortable using just an ICMP ping to locate hosts on his internal network, while an external penetration tester may use a diverse set of dozens of probes in an attempt to evade firewall restrictions.
$
$
$ nmap -sL 192.168.178.1 # (List Scan)
$
$ nmap -sn 192.168.178.1 # (No port scan)
$
$ nmap -Pn # (No ping)
$
$ nmap -PS <port list> # (TCP SYN Ping)
$
$ nmap -PA <port list> # (TCP ACK Ping)
$
$ nmap -PU <port list> # (UDP Ping)
$
$ nmap -PY <port list> # (SCTP INIT Ping)
$
$ nmap -PE; -PP; -PM # (ICMP Ping Types)
$
$ nmap -PO <protocol list> # (IP Protocol Ping)
$
$ nmap --disable-arp-ping # (No ARP or ND Ping)
$
$ nmap --traceroute # (Trace path to host)
$
$ nmap -n # (No DNS resolution)
$
$ nmap -R # (DNS resolution for all targets)
$
$ nmap --resolve-all # (Scan each resolved address)
$
$ nmap --system-dns # (Use system DNS resolver)
$ nmap --dns-servers <server1>[,<server2>[,...]] # (Servers to use for reverse DNS queries)
While Network mapper has grown in functionality over the years, it began as an efficient port scanner, and that remains its core function. The simple command nmap <target>
scans 1,000 TCP ports on the host <target>
. While many port scanners have traditionally lumped all ports into the open or closed states, Network mapper is much more granular. It divides ports into six states: open
, closed
, filtered
, unfiltered
, open|filtered
, or closed|filtered
.
open|filtered In this state when it is unable to determine whether a port is open or filtered. This occurs for scan types in which open ports give no response. The lack of response could also mean that a packet filter dropped the probe or any response it elicited. So Network nmapper does not know for sure whether the port is open or being filtered. The UDP, IP protocol, FIN, NULL, and Xmas scans classify ports this way.
closed|filtered This state is used when Network nmmapper is unable to determine whether a port is closed or filtered. It is only used for the IP ID idle scan.
While attempts to produce accurate results, keep in mind that all of its insights are based on packets returned by the target machines (or firewalls in front of them). Such hosts may be untrustworthy and send responses intended to confuse or mislead the scanner. FIN, NULL, and Xmas scans are particularly susceptible to this problem. Such issues are specific to certain scan types and so are discussed in the individual scan type entries.
-sS
(TCP SYN scan)
-sT
(TCP connect scan)
-sU
(UDP scans)
-sY
(SCTP INIT scan)
-sN
; -sF
; -sX
(TCP NULL, FIN, and Xmas scans)
-sA
(TCP ACK scan)
-sW
(TCP Window scan)
-sM
(TCP Maimon scan)
--scanflags
(Custom TCP scan)
-sZ
(SCTP COOKIE ECHO scan)
-sI
(idle scan)<zombie host>
[:<probeport>
]
-sO
(IP protocol scan)
-b
(FTP bounce scan)<FTP relay host>
Nmap is very good at detecting services and versions of the services running on the target system. But this service detection features does not come by default there are some nmap flags or options that you can pass fo nmap to be able to detect service running on the target machine.
Nmap Version detection is enabled and controlled with the following options:
-sV
(Version detection)
--allports
(Don't exclude any ports from version detection)
--version-intensity
(Set version scan intensity)<intensity>
--version-light
(Enable light mode)
--version-all
(Try every single probe)
--version-trace
(Trace version scan activity)