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On this page
  • Powershell
  • Test-NetConnection
  • Test-TcpPort
  • Scanning without Nmap
  • NetScan - From Windows Host
  • Fscan
  • Naabu
  • Masscan
  • Nmap
  • Fast scan
  • Host file
  • Nmap options
  • Open port
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  • UDP
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  • Find NSE script
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  1. Pentest
  2. Protocols

Port Scan

PreviousProtocolsNextIDS IPS AV Evasion

Last updated 4 hours ago

Powershell

Test-NetConnection

PS C:\Users\jamie\Desktop> Test-NetConnection -Port 1433 192.168.210.15

$d='DC1';$p=53,88,135,389,445,3268,3269,636,9389;$u=53,88,389;$p|%{if(Test-NetConnection $d -Port $_){"TCP $_-Open"}else{"TCP $_-Closed"}};$u|%{try{$c=[net.sockets.udpclient]::new();$c.Connect($d,$_);$null=$c.Send((,0),1);"UDP $_-Open"}catch{"UDP $_-Closed"}finally{$c.Close()}}

Test-TcpPort

Scanning without Nmap

# Find IPs
for i in {1..255}; do (ping -c 1 192.168.1.${i} | grep "bytes from" &); done    

# Find Ports
for i in {1..65535}; do (echo > /dev/tcp/192.168.1.1/$i) >/dev/null 2>&1 && echo $i is open; done

NetScan - From Windows Host

Fscan

./fscan -h 172.17.0.0/24

./fscan -h 172.17.0.2 -p 1-65535

Naabu

naabu -host target.com
naabu -host target.com | httpx -silent

Masscan

masscan <target-ip> /16 
masscan <target-ip> /24

-p: Ports

masscan <target-ip> /16 -p 80,443 

masscan <target-ip> /16 -p 22-80 

masscan <target-ip> /16 -p 0-65535

--top-ports

masscan <target-ip> /16 --top-ports 100

Nmap

Nmap binary:

For Windows - Zenmap

nmap -sV --open -oA nibbles_initial_scan 10.129.42.190
nmap -sC -p 22,80 -oA nibbles_script_scan 10.129.42.190
nmap -sV --script=http-enum -oA nibbles_nmap_http_enum 10.129.42.190 

List of common ports:

nmap -Pn -sC -sV --top-ports=1000 [IP]

Fast scan

nmap -F [IP]

# Threads 5
nmap -sC -sV [IP] -T5

Host file

nmap -iL targets.txt

Nmap options

Nmap Option

Description

10.10.10.0/24

Target network range.

-sn

Disables port scanning.

-Pn

Disables ICMP Echo Requests

-n

Disables DNS Resolution.

-PE

Performs the ping scan by using ICMP Echo Requests against the target.

--packet-trace

Shows all packets sent and received.

--reason

Displays the reason for a specific result.

--disable-arp-ping

Disables ARP Ping Requests.

--top-ports=<num>

Scans the specified top ports that have been defined as most frequent.

-p-

Scan all ports.

-p22-110

Scan all ports between 22 and 110.

-p22,25

Scans only the specified ports 22 and 25.

-F

Scans top 100 ports.

-sS

Performs an TCP SYN-Scan.

-sA

Performs an TCP ACK-Scan.

-sU

Performs an UDP Scan.

-sV

Scans the discovered services for their versions.

-sC

Perform a Script Scan with scripts that are categorized as "default".

--script <script>

Performs a Script Scan by using the specified scripts.

-O

Performs an OS Detection Scan to determine the OS of the target.

-A

Performs OS Detection, Service Detection, and traceroute scans.

-D RND:5

Sets the number of random Decoys that will be used to scan the target.

-e

Specifies the network interface that is used for the scan.

-S 10.10.10.200

Specifies the source IP address for the scan.

-g

Specifies the source port for the scan.

--dns-server <ns>

DNS resolution is performed by using a specified name server.

Output Options

Nmap Option

Description

-oA filename

Stores the results in all available formats starting with the name of "filename".

-oN filename

Stores the results in normal format with the name "filename".

-oG filename

Stores the results in "grepable" format with the name of "filename".

-oX filename

Stores the results in XML format with the name of "filename".

Performance Options

Nmap Option

Description

--max-retries <num>

Sets the number of retries for scans of specific ports.

--stats-every=5s

Displays scan's status every 5 seconds.

-v/-vv

Displays verbose output during the scan.

--initial-rtt-timeout 50ms

Sets the specified time value as initial RTT timeout.

--max-rtt-timeout 100ms

Sets the specified time value as maximum RTT timeout.

--min-rate 300

Sets the number of packets that will be sent simultaneously.

-T <0-5>

Specifies the specific timing template.

Open port

nmap 10.129.2.0/24 -F -oN tnet.default
cat tnet.default | grep "/tcp" | wc -l

IDS/IPS Detection

UDP

sudo nmap 10.129.2.28 -F -sU

Convert XML Result to HTML

xsltproc target.xml -o target.html

Vulnerability

Update nse scripts: sudo nmap --script-updatedb

sudo nmap 10.129.2.28 -p 80 -sV --script vuln 

Nmap scan report for 10.129.2.28
Host is up (0.036s latency).

PORT   STATE SERVICE VERSION
80/tcp open  http    Apache httpd 2.4.29 ((Ubuntu))
| http-enum:
|   /wp-login.php: Possible admin folder
|   /readme.html: Wordpress version: 2
|   /: WordPress version: 5.3.4
|   /wp-includes/images/rss.png: Wordpress version 2.2 found.
|   /wp-includes/js/jquery/suggest.js: Wordpress version 2.5 found.
|   /wp-includes/images/blank.gif: Wordpress version 2.6 found.
|   /wp-includes/js/comment-reply.js: Wordpress version 2.7 found.
|   /wp-login.php: Wordpress login page.
|   /wp-admin/upgrade.php: Wordpress login page.
|_  /readme.html: Interesting, a readme.
|_http-server-header: Apache/2.4.29 (Ubuntu)
|_http-stored-xss: Couldn't find any stored XSS vulnerabilities.
| http-wordpress-users:
| Username found: admin
|_Search stopped at ID #25. Increase the upper limit if necessary with 'http-wordpress-users.limit'
| vulners:
|   cpe:/a:apache:http_server:2.4.29:
|     	CVE-2019-0211	7.2	https://vulners.com/cve/CVE-2019-0211
|     	CVE-2018-1312	6.8	https://vulners.com/cve/CVE-2018-1312
|     	CVE-2017-15715	6.8	https://vulners.com/cve/CVE-2017-15715

Admin interface:

CMS :

Find NSE script

$ locate -r nse$|grep nfs
/usr/share/nmap/scripts/nfs-ls.nse
/usr/share/nmap/scripts/nfs-showmount.nse
/usr/share/nmap/scripts/nfs-statfs.nse

Nmap - NSE

  • safe:- Won't affect the target

  • intrusive:- Not safe: likely to affect the target

  • vuln:- Scan for vulnerabilities

  • exploit:- Attempt to exploit a vulnerability

  • auth:- Attempt to bypass authentication for running services (e.g. Log into an FTP server anonymously)

  • brute:- Attempt to bruteforce credentials for running services

  • discovery:- Attempt to query running services for further information about the network (e.g. query an SNMP server).

Resources

Interesting Books

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Support this Gitbook

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The official guide to the Nmap Security Scanner, a free and open source utility used by millions of people for network discovery, administration, and security auditing. From explaining port scanning basics for novices to detailing low-level packet crafting methods used by advanced hackers, this book by Nmap's original author suits all levels of security and networking professionals.

A guide to simulating an internal security breach. You’ll take on the role of the attacker and work through every stage of a professional pentest, from information gathering to seizing control of a system and owning the network.

The book offers one of the most complete and in-depth analyses of Wi-Fi and Bluetooth networks, then progresses through the various protocols such as DNS, ARP, SMTP, and others.

Common Ports
IDS IPS AV Evasion
Default Credentials
Web login
CMS
Interesting Books
Nmap Network Scanning
The Art of Network Penetration Testing
Network Basics for Hackers
GitHub - scmanjarrez/CVEScannerV2: Nmap script that scans for probable vulnerabilities based on services discovered in open ports.GitHub
GitHub - vulnersCom/nmap-vulners: NSE script based on Vulners.com APIGitHub
GitHub - projectdiscovery/naabu: A fast port scanner written in go with a focus on reliability and simplicity. Designed to be used in combination with other tools for attack surface discovery in bug bounties and pentestsGitHub
GitHub - shadow1ng/fscan: 一款内网综合扫描工具,方便一键自动化、全方位漏扫扫描。GitHub
static-binaries/nmap at master · andrew-d/static-binariesGitHub
Download the Free Nmap Security Scanner for Linux/Mac/Windows
SoftPerfect Network Scanner : fast, flexible, advanced
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Recon series #4: Port scanning methods for revealing hidden services
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