Nmap (Network Mapper) is a security scanner originally written by Gordon Lyon (also known by his pseudonym Fyodor Vaskovich) used to discover hosts and services on a computer network, thus creating a "map" of the network.
Questions tagged [nmap]
250 questions
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Nmap takes forever when pinging ports
When I execute nmap -sn 192.168.1.0/24, it takes 12 seconds to find 256 hosts but when I execute nmap -sS 192.168.1.0/24, it takes forever. Why is this happening?
I cannot see what I did wrong. Maybe I wrote my address wrong or something. I am…
Andrei Marin
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Hide running service such as Nginx from a port scan
When I run a Port Scan to my server through NMap (like this)...
$ nmap -A -p443 example.com
...then I get an output like...
Starting Nmap 7.70 ( https://nmap.org ) at 2018-03-29 00:14 BST
Nmap scan report for example.com (1.2.3.4)
Host is up…
David Garcia
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cant scan and ping my ip from outside
when I scan my network using nmap it gives me something like this
#nmap -vv -Pn -sV -sT -p80 -oG - 116.135.*.*
# Ports scanned: TCP(1;80) UDP(0;) SCTP(0;) PROTOCOLS(0;)
Host: 116.135.*.* () Status: Up
Host: 116.135.*.* () Ports:…
Fxc3dC
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I have a IP address with some open services. How could I contact the owner?
After having serious problems (DNS incident) I found out an IP address of a machine. Is it in any way possible to contact the owner without knowing anything else like email, domain name or website? I scanned it via nmap and found some services…
brubaker
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Can zenmap disrupt my server?
Title says almost everything already.
I'm trying to increase the security on our servers but I need verification that the Information Gathering tool ZenMap or NMap does not disrupt our servers.
The only thing I want to achieve is a list of open and…
Rob
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Ports do not open after rules appended in iptables
I have a server that I am trying to setup for OpenVPN. I have followed all the steps, but I see that when I try to connect to it in Windows, it doesn't allow me, it just hangs on connecting, so I did a nmap scan and I see that port 1194 is not open…
user2699451
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Nmap scans the host but cannot ping the host
My laptop is connected to a network where we have routers with filters. I can use nmap to scan alive hosts and I can see open ports (mostly port 80). But then, when I try to ping those hosts, I dont receive any data. Can anyone point out what the…
kevin
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how can I verify whether multiple ip addresses are hosting on same server?
Many hosting providers put multiple ip addresses on same physical machine. If I have two ip address, for example: 192.168.1.100 and 192.168.1.101. If I can only send probing packets from afar, how can I tell if these ip addresses are hosted on same…
Long Cheng
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Difference between local and remote nmap - trying to set up mysql server remote access
I am try to set up mysql remotely. I have followed a number of guides such as this, and I have ended up using nmap to see what ports are open.
When I am on my laptop, nmap -P0 gives:
Nmap scan report for <> (ip.address.here)
Host is up…
k4kuz0
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ports I open with iptables appear closed
I opened the following ports with iptables on Debian 7:
iptables -X
iptables -F
iptables -P INPUT DROP
iptables -P FORWARD DROP
iptables -P OUTPUT ACCEPT
iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
iptables -A INPUT -p tcp…
user3680708
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