Questions tagged [nmap]

A robust and open source security tool for network discovery and security auditing.

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111 views

Can I gain access by nmap?

I have a Debian machine with nginx 1.14.0 (Ubuntu), and I found an exploit, https://www.rapid7.com/db/modules/exploit/linux/http/nginx_chunked_size But, is it possible to gain access by only nmap?
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Nmap loads on its own, scans addresses, with a different source address than my PC. How is this possible?

10 minutes after installing Nmap on a fresh install of windows, NMap loaded on its own and attempted to scan dozens of IP addresses around the globe. I never initiated the scan. Notice the source ...
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2answers
69 views

Nessus detect more open ports than nmap

I scan my site via namp , I only see 3 ports open. nmap -sV {ip} Starting Nmap 7.80 ( https://nmap.org ) at 2020-01-25 09:42 EST ...
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1answer
78 views

Smart Lightbulb Using Common IRC port found in NMAP - anything to worry about?

UPDATE: Looking at the product again, I don't think this even has built in Wi-Fi (it uses bluetooth for the connection). I don't know what I am looking for here in Wireshark, but I added the host ...
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0answers
65 views

Is there an updated (non-Nmap) top 100 or top 1000 common ports list?

I know Nmap has nmap-services file which gives us the list of top 1000 ports/services found on the Internet. But this list seems to be outdated, as the Nmap top 1000 list doesn't include several ...
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1answer
72 views

nmap - how can I input a target to nmap from a file with the netmask attached?

I have a c program that gets the router IP and netmask and puts it into a text file in the format of 192.168.1.1/24. When I issue the nmap scan command with the target text file I get the unable to ...
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0answers
12 views

tcpwrapped ports in nmap [duplicate]

As part of a pentesting lab, my Kali is on a WAN and I have hosts behind a pfsense firewall. One of the steps is the list of open ports and services running on those ports. I am using nmap to do that (...
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1answer
157 views

Nmap giving different result between Mac OS scan and Linux (Kali) scan [closed]

I try to do a simple TCP scan on an Kubunt VM (is on VirtualBox), from two different OS. From the Host (Mac OS system) and from a Kali Linux VM (tried VirtualBox and Parallels also). Kali Linux (...
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0answers
156 views

Nmap Shows all ports are closed [closed]

I am facing a problem with Nmap while scanning metasploitable. I am using two different PCs. One with Kali Linux by using USB boot and on other PC using Metasploitable running on VMWare. I have ...
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1answer
74 views

nmap's -sn flag works when a single target is specified, but, not when multiple targets are

When I specify an individual target, >nmap -v3 -sn 172.18.188.209 I get the correct and expected nmap response Starting Nmap 7.70 ( https://nmap.org ) at 2019-11-08 11:16 India Standard Time ...
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1answer
231 views

nmap: Same IP, different domain names, different results?

I'm scanning a network (whose name will not be stated). It has >1 IP addresses. When I tried scanning its subdomains, there are several subdomains that are translated to the same IP address but return ...
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1answer
194 views

Disabled Network Discovery for port 5357 but it still shows up as open in NMap scan

as mentioned in the title I have disabled Network Discovery for all of the 3 profiles yet when I run an NMap scan, the port comes up to be open. I have also run the command netstat -a -b to find the ...
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1answer
97 views

Nmap scan slow on some IP ranges [closed]

I'm a security newbie trying to scan a VPN in the range 10.0.0.0 - 10.0.15.254 using nmap on Kali Linux. The routing table: route -n Kernel IP routing table Destination Gateway Genmask ...
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0answers
56 views

Inbound rules for a port is configured and disabled yet an NMap scan shows that the port is opened

I am new to Windows Defender but have read about it to understand the basics of Inbound/Outbound rules. As mentioned on the app, Inbound connections that do not match a rule are simply blocked. For ...
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1answer
123 views

Firebase ports scanning using nmap

Purely for research purposes used nmap to check security of my application deployed to Firebase. However, there some questions which I can't understand: Why Firebase has open so many ports? Something ...
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1answer
333 views

nmap scanning - What is the difference between -sP and -sn?

On the Nmap home page in my language, I can see -sP scan, but on the English version of the site, I can't see it. But I see -sn that looks very similar, I want to understand what's the difference.
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1answer
27 views

nmap xml file has only one row [closed]

I'm using Zenmap to discover some hosts. I save the scan as an nmap xml file. Then I import the xml file into excel to view the data. There are thousands of rows of output in the Zenmap console, but ...
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1answer
104 views

Hardening against Nmap and other network scanners

It is possible to make Server respond with irrelevant data if it is scanned with Nmap? If yes, are there any examples of such SW?
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110 views

nmap gives different results in two shells on the same computer

I'm running kali and metasploitable2 in Virtualbox, and have them connected via the host-only networking mode. I can ping and ssh from kali to metasploitable, and have assigned the following IP ...
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0answers
135 views

NMAP not showing all live hosts

I have a live host on 192.168.0.151 on my local network. I know it's live since I've set it up with a static IP and also if pinged, I get a reply. The weird thing is when I run nmap -sP 192.168.0....
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166 views

NMAP traceroute result

I am currently using the below command to find out to perform post-scan using information from the scan results to determine if i can use specific port (e.g. 113/tcp) to reach the target. But when i ...
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0answers
246 views

How to fingerprint Windows 10 reliably?

Recently, I have been practicing penetration testing and I have come to a standstill when trying to fingerprint the OS for a Windows 10 target with nmap. For the most part, I'm not able to identify ...
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1answer
180 views

Why is scanning considered a pre-attack and not reconnaissance?

I am studying for a CEH certificate. I have a question about a simple quiz and a book that I am reading. In the CEH book, it states that: We can scan for a target using network tools (e.g. tarcert, ...
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1answer
121 views

Modified NMAP script: variable 'host' is not declared [closed]

I am modifying an nse script, ssl-cert.nse, which was already made for enumerating ssl certificates. I want to output the host ip and the port number in a line of the ssl certificate output. However, ...
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2answers
67 views

Test Hosts Available for NMAP Scanning? [closed]

Are there any known hosts online that make themselves available for port scanning in order to learn tools like NMAP? Thanks!
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1answer
203 views

What is the difference between probe and scan?

I'm struggling to understand the difference between probe and scan because they seem very similar. Does NMAP tool use probes and scans? Could you give a practical example to make the theoretical ...
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1answer
709 views

How to use Nmap as a port knocking client?

I want to use Nmap for port knocking on CTF machines, so I've read the manual for configuring it properly: nmap <ip> -p <port1>,<port2>,... -r --max-retries 0 --max-parallelism 1 ...
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1answer
620 views

nmap privilege escalation - is still a risk?

There is a known and popular technique to leverage nmap for privilege escalation if the suid bit is set for nmap. One can execute nmap in interactive mode and from there execute bash commands in the ...
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1answer
1k views

Ports Showing Closed/Filtered in Nmap Scans

hopefully this isn't a stupid question.. I am running some nmap scans and I get a list of ports that show closed. Why would they even show in the scan report? Can these be exploited further with other ...
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1answer
264 views

Scanning multiple hosts with Nmap's Default Accounts NSE script not producing the expected result

I'm utilizing Nmap's default account credential scanner. I've built a couple of my own fingerprints and I've tested that the fingerprints work when scanning one host at a time. Example command line ...
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2answers
169 views

How can I check what scripts are in Nmap's default category (`--script=default`)?

I know that the -sC and -A options run the "default" category of scripts (--script=default): https://nmap.org/book/nse-usage.html I've searched the nmap script folder for a default sub-folder, but ...
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573 views

Open ports on my NetGear router

I ran an nmap scan on my home router and I am seeing a ton of open ports. Is this normal? How do I go about closing them? $ nmap 192.168.1.1 Starting Nmap 7.70 ( https://nmap.org ) at 2019-03-16 20:...
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1answer
418 views

how to check if remote host is running LDAP server?

I am currently pen-testing a remote website (its mine) I would like to know if its possible to test if the web-server is running LDAP server. I tried Nmap with no luck(it lists every port from 1 to ...
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1answer
100 views

<hostscript> tag missing in nse output for http-drupal-enum script [closed]

I use the ruby NMAP::XML class to pick apart the nse output from large scans but it expects the script output to be embedded in hostscript tags. I have just started using http-drupal-enum script (in ...
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0answers
29 views

Nmap showing different open ports every few seconds [duplicate]

I'm running Nmap on an Amazon Web Services EC2 instance but between runs just a couple seconds apart, I'm getting new results. Is this normal? I'm seeing open ports then they don't show. I'm running ...
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0answers
49 views

Is there any Nmap command/script to identify certificate name mismatch and untrusted certificate?

I am using Nmap commands in my script for server validation. I know in Nmap there is the ssl-cert.nse script that retrieves details about the server certificate. I want one more step where I find ...
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0answers
164 views

nmap - No Ports Open [closed]

I bought a Tonbux Smart WiFi Plug WL-SC01 and I'm doing some hack tests on it for educational purposes. I used nmap to check for both UDP and TCP ports but both return that there are no open ports at ...
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1answer
1k views

NMAP results inconsistent

I'm doing a NMAP scan that runs continuously. For some reason the results are not consistent. Sometimes it detects all the connected devices of the local network and sometimes only some of them. ...
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1answer
133 views

Nmap / Qualys say 3DES is available, but OpenSSL fails to connect

Running a Qualys scan showed that the IP was vulnerable to a Sweet32 attack, here is the output: TLSv1 WITH 64-BIT CBC CIPHERS IS SUPPORTED DES-CBC3-SHA RSA RSA SHA1 3DES(168)...
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1answer
51 views

Finding how many filtered ports of a host that would be listed as “filtered” on Nmap

I just started working on nmap and was confused by this question. I'm unsure if I understood it correctly, so I appreciate your help with this. Using Nmap, find how many ports are filtered in testphp....
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2answers
515 views

nmap - Difference between “Filtered” and “Admin-Prohibited”

I am a rather new user to nmap. By using some Google-Fu, I am still not able to ascertain what is the criteria used in order to distinguish "filtered" ports from "admin-prohibited" as they both seem ...
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2answers
708 views

Is there a way to see if an nMap scan in the background is progressing?

I have launched an nMap scan from an Ubuntu machine with the following parameters: nmap -Pn -T3 -sS -sV -iL /home/tsouser/Desktop/Scope.txt --reason --top-ports 100 --max_rtt_timeout 200ms --...
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0answers
344 views

Why nmap password scanner completes in 10 seconds and doesn't give any result?

I'm completely new to nmap and I'm trying to brute force passwords on a target. A command that I'm trying is: nmap -p 80 --unprivileged --script http-form-brute <target> But instead of "...
3
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2answers
287 views

Should ports be visible to nmap?

I'm currently working on the firewall when I discovered that the firewall exposes a lot of ports outside of the internal network. I discovered this when setting up a new FTP server using a basic nmap ...
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2answers
321 views

Nmap simultaneous scanning

Quick Nmap question. If there are X amount of ports per machine to scan and I want to scan 2 machines at once (no more no less), is there any way of forcing nmap to always be scanning 2 different ...
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2answers
590 views

Do I have to block UDP ports when I launch my own server with a public IP?

I am trying to give better security to my Raspberry sever. When I installed UFW, I allowed just port 80/tcp and my own high port for SSH communication, and by default are all others ports "deny". ...
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2answers
117 views

What exactly does a default port scan look like? I am trying to run a default port scan without setting off the ids on my test network

What is the best option to use for a default port scan of a server on my test network without setting off the ids using nmap. -f is not a switch i am wanting to use.
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1answer
345 views

NMAP NSE script stopping after 900 seconds (15 minutes)

I am experimenting with ssh bruteforce over my home network using the ssh-brute nse script. I have a short list of usernames (just 12) but a long list of passwords (1M). I can't seem to get the ssh-...
3
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2answers
925 views

Nmap not following redirect when using “http-title” script

I am trying to scan a bunch of IPs for their http-title. Now the problem I have is that nmap pretty much never follows any redirects. Usually the title I want is behind that redirect though. For ...
5
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1answer
269 views

How can Nmap bypass Windows Server firewall rules?

I need to block all communication (inbound/outbound) from server A to server B (all ports/all protocols). Server A should communicate with every machine except server B. I can't place firewall rules ...

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