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Questions tagged [nmap]

nmap is a free, open source, scriptable network security scanner. It features port scanning and service/version detection.

Nmap is a free and open-source port scanner, operating system fingerprinter, and service fingerprinter, fully extensible via the Lua-based Nmap Scripting Engine (NSE).

Here are some resources for answering Nmap questions:

Source: Stack Overflow's and Unix.SE's nmap tag wikis (text by bonsaiviking)

101 questions
11
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2 answers

nmap in ubuntu 13.10

idk wheather to post such a silly question in this forum.just out of interest i want to know few things. can i use nmap in ubuntu 13.10 is backtrack another distro like ubuntu i have heard that backtrack is based on ubuntu` if backtrack comes with…
black
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10
votes
2 answers

Why is nmap not working in 18.04?

After fresh installs of Ubuntu 18.04 and nmap (snap install) on two separate machines, both return the same nmap error: dnet: Failed to open device [device-name] QUITTING! when I run the command: sudo nmap -sn 192.168.1.0/24 Is there a new…
Les
  • 121
4
votes
2 answers

Pipe Viewer with Nmap (progress bar)

I would like to know if there is a way to use "pipe viewer" with "Nmap" together. Example: pv | Nmap -sP 192.168.1.0/24 But I couldn't get the progress bar working properly. I mean it should be telling me the percentage of Nmap. Starts from 0%,…
ggalaxy
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2
votes
2 answers

Launcher for Zenmap (or nmapfe) as SUDO

I've installed nmap, and also nmapFE. By default these are NOT set up to run as root; however, the tasks I need to run require it. I am able to run sudo nmapfe from terminal; however, if I create a launcher for this, it doesn't run. What am I doing…
Kendor
  • 4,858
2
votes
2 answers

Is it possible to search for a keylogger using netstat / nmap?

I read on website (http://www.psychocats.net/ubuntu/security#firewallantivirus) the following phrase: "By default, Ubuntu ships with no open ports on public interfaces." Does that mean that if I got infected by a keylogger my computer would not…
Matheus
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1
vote
1 answer

Zenmap for Ubuntu 20.04.1 LTS

Is zenmap available for Ubuntu 20.04.1 LTS with nmap 7.80? I've already try the instruction at the following link: Has zenmap vanished from 20.04? but packages are not available.
Davide Sestili
  • 87
0
votes
1 answer

How to know service name and disable it after scanning using nmap?

When I scan my ubuntu using nmap I get this result: Starting Nmap 7.40 ( https://nmap.org ) at 2017-10-20 10:40 EET Nmap scan report for localhost (127.0.0.1) Host is up (0.000097s latency). Not shown: 997 closed ports PORT STATE SERVICE 443/tcp…
Mido
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0
votes
2 answers

basic understanding of nmap

ok so i heard nmap is illegal in some countries, similar to going around and checking the door handle around the neighborhood to see if intrusion is possible. if i use nmap like nmap -0 -sS 192.168.1.1/24 am i scanning the entire network from…
user610658
0
votes
1 answer

nmap scenning ports when ufw is disabled

Starting Nmap 7.01 at 2016-09-26 18:54 CEST Nmap scan report for mypage.com (IP-ADRESS) I'm a Ubuntu beginner. I've set up a dyndns service to redirect the connection for my domain. I've turned off the firewall. When I type sudo nmap IP-ADRESS it…
Dusko P
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0
votes
1 answer

Nmap ICMP Request with IP Options

Just need to put the "router alert" option in a Ping Request. Router Alert is 0x94040000 at the end of the IP header. This is what I've tried (and a lot of other variations): sudo nmap -sU -PE --ip-options "\x94\x04\x00\x00" 15.234.166.241 nmap man…
Scott
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0
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0 answers

Should port 25 be open on localhost (Ubuntu 18.04)

Port 25 is open on localhost and also on my internal 192.168.1.xxx number. The nmap scan shows: 25/tcp open smtp Postfix smtpd Should this be the case? I am not trying to run an SMTP server. However, for all I know, this is standard for Linux. I…
user203748
  • 303
0
votes
2 answers

How to scan all ports in nmap

I didn't get what ports does Nmap scan. Does Nmap start from zero or one when scan subnet or all the ports? 0/24 is it 0-255 or is it 1-255 -p is it 0-65535 or is it 1-65535
Ven Ven
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0
votes
1 answer

Rename device ID as returned by nmap

I would like to rename a device on my network as I have several devices from the same mfg. For example, an Asus wireless router shows the same mfg name as an Asus motherboard (connected by Ethernet), as such: Nmap scan report for 192.168.1.110 Host…
xen20
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