Questions tagged [nmap]
a free and open-source port scanner, operating system fingerprinter, and service fingerprinter
215 questions
0 votes
0 answers
23 views
nmap updatedb not collecting latest on github
I have installed nmap using the guidance on nmap.org here nmap --version yields Nmap version 7.95 ( https://nmap.org ) Platform: x86_64-redhat-linux-gnu Compiled with: nmap-liblua-5.4.6 openssl-3.0.13 ...
- 1
1 vote
0 answers
107 views
`nmap` showing different hostnames than expected
When I run nmap 192.168.1.*, I get a print out of all devices on my network. The hostnames are not what I expect. For example, the hostname of the Linux desktop (192.168.1.203) I am currently on is ...
- 139
0 votes
1 answer
2k views
How to measure TCP latency?
OS is Debian on both servers. I found some examples showing how to measure TCP latency with nmap: nmap --packet-trace -p 22 192.168.0.10 But I'm getting some negative results for latency. ie, it will ...
- 167
-2 votes
1 answer
100 views
Why is it written in nmap official doc that -sL does not send any packet, when it actually send them?
Sniffing with wireshark, I see a bunch of ARP and DNS requests. So why in the official doc it's written this: The list scan is a degenerate form of host discovery that simply lists each host of the ...
- 265
1 vote
1 answer
111 views
Linux Webserver not "Accepting" Connections
First off, thanks for any help anyone can provide, I greatly appreciate it! I have a basic network I have set up for testing. It has pfSense acting as a Gateway/DHCP/DNS host and two Linux machines ...
- 11
0 votes
1 answer
4k views
Does 'apt update' also update nmap's scripts?
I'm building a Linux OVA on a VM to scan stuff with nmap. I'm using cron to keep my packages up to date: sudo apt-get update sudo apt-get upgrade sudo apt-get autoremove It's from my understanding ...
- 5
0 votes
0 answers
143 views
Nmap scans are not persistent after reboot
I use Zenmap on Linux 6.0.0-kali3-amd64 which runs on Oracle VirtualBox to see open ports in Metasploitable2. When I save the Zenmap scan to /home I can successfully open the scan again until I reboot ...
- 19
0 votes
3 answers
4k views
How to grep only ports from nmap scan output file?
➜ cat nmap/ports.nmap Starting Nmap 7.92 ( https://nmap.org ) at 2022-10-21 11:30 IST Warning: 10.10.10.100 giving up on port because retransmission cap hit (10). Nmap scan report for 10.10.10.100 ...
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