Scan Tool For Mac Address Linux

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Env- Centos 7 , nmap 6.40

Currently I'm trying to fetch MAC/HW addresses for few list of IP's via nmap command utility and with root user its working perfectly.

As root user

Starting Nmap 6.40 ( http://nmap.org ) at 2018-06-19 07:05 EDTNmap scan report for 192.168.xx.xxHost is up (0.0015s latency).MAC Address: XX:XX:XX:XX:XX:XX

As non-root user

Warning: You are not root -- using TCP pingscan rather than ICMP

Starting Nmap 6.40 ( http://nmap.org ) at 2018-06-19 07:19 EDTNote: Host seems down. If it is really up, but blocking our ping probes, try -PnNmap done: 1 IP address (0 hosts up) scanned in 2.01 seconds

Requesting your suggestion/help how the same to be achieve via normal user.

Thanks

2 Answers

It is possible to run nmap as non-root user. This Wiki describes pretty good how to set everything up to run it as an unprivileged user. The linked tutorial also describes this for Ubuntu and Red Hat systems, which should be good for you since you are on CentOS.

I think it is important to keep this security warning in mind:

WARNING: This is dangerous. The Nmap Scripting Engine (NSE) allows scripts to sniff the network, change firewall roules and interface configuration, or exploit vulnerabilities including on localhost. It's possible, especially with elevated capabilities, for a clever person to use Nmap and NSE to escalate to full root privileges. If you do not understand these risks, do not do this.

Summary from the Wiki:

1. Restrict access to certain groups, for example adm. Make sure that you use the right location of nmap. In my case, this was /usr/bin/nmap:

2. Make sure the setcap command is installed (more information about capabilities here):

3. Now, set the capabilities. Once again, make sure to use the right location.

4. Finally, you are able to run nmap as unprivileged user. But, you have to explicitly define that you want to do so. You can define it as an argument of nmap

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or as an environmental variable:

Edit: I don't exactly know why this answer is being down-voted since this is one possible answer to the question (although the question is of course better suited for Super User or Unix & Linux Stack Exchange). I added the results from my own systems with and without --privileged below:

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Nmap must be run as root in order to retrieve this information. Fortunately, there are other sources of MAC address information on a Linux system: the system's ARP tables. After making an attempt to contact an IP address (either using Nmap or some other tool like ping), run arp -n to print the table of IP-to-MAC address mappings.

Scan Tool For Mac Address Linux Command

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Nmap ('Network Mapper') is a free and open source(license) utility fornetwork discovery and security auditing. Many systems and networkadministrators also find it useful for tasks such as networkinventory, managing service upgrade schedules, and monitoring host orservice uptime. Nmap uses raw IP packets in novel ways to determinewhat hosts are available on the network, what services (applicationname and version) those hosts are offering, what operating systems(and OS versions) they are running, what type of packetfilters/firewalls are in use, and dozens of other characteristics. Itwas designed to rapidly scan large networks, but works fine againstsingle hosts. Nmap runs on all major computer operating systems, andofficial binary packages are available for Linux, Windows, and Mac OSX. In addition to the classic command-line Nmap executable, the Nmapsuite includes an advanced GUI and results viewer(Zenmap), a flexible datatransfer, redirection, and debugging tool(Ncat), a utility forcomparing scan results (Ndiff), and a packet generation and response analysis tool (Nping).

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• Flexible: Supports dozens of advanced techniques formapping out networks filled with IP filters, firewalls, routers, andother obstacles. This includes many port scanning mechanisms (both TCP &UDP), OSdetection, version detection, ping sweeps, and more. See the documentation page.
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• Portable: Most operating systems are supported, includingLinux,Microsoft Windows,FreeBSD,OpenBSD,Solaris,IRIX,Mac OS X,HP-UX,NetBSD,Sun OS,Amiga,and more.
• Easy: While Nmap offers a rich set of advanced features forpower users, you can start out as simply as 'nmap -v -A targethost'. Both traditional command line and graphical (GUI)versions are available to suit your preference. Binaries areavailable for those who do not wish to compile Nmap from source.
• Free: The primary goals of the Nmap Project is to help makethe Internet a little more secure and to provideadministrators/auditors/hackers with an advanced tool for exploringtheir networks. Nmap is available for free download, and also comes with fullsource code that you may modify and redistribute under the terms ofthe license.
• Well Documented: Significant effort has been put intocomprehensive and up-to-date man pages, whitepapers, tutorials, andeven a whole book! Find them in multiplelanguages here.
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Nmap users are encouraged to subscribe to the Nmap-hackersmailing list. It is a low volume (8 posts in 2016), moderated listfor the most important announcements about Nmap, Insecure.org, andrelated projects. You can join more than 128,000 current subscribersby submitting your email address here:

We also have a development list for more hardcore members(especially programmers) who are interested in helping the project byhelping with coding, testing, feature ideas, etc. New (test/beta)versions of Nmap are sometimes released here prior to generalavailability for QA purposes. You can subscribe at the Nmap-dev listinfo page.

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