Nmap done: 1 IP address (1 host up) scanned in 0.03 seconds Warning: You are not root - using TCP pingscan rather than ICMP I added the results from my own systems with and without -privileged below: $ nmap -sP -PE 192.168.0.1 Or as an environmental variable: export NMAP_PRIVILEGED=""Įdit: 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). You can define it as an argument of nmap nmap -privileged -sP -PE -iL
But, you have to explicitly define that you want to do so. Advanced IP Scanner A free network address scanner for Windows that has more than 30 million users. Angry IP Scanner A free network analysis tool for Windows, Linux, and Unix. Finally, you are able to run nmap as unprivileged user. hping A free command-line Ping tool for Linux, Unix, and Mac OS and Windows. sudo setcap cap_net_raw,cap_net_admin,cap_net_bind_service+eip /usr/bin/nmapĤ. Once again, make sure to use the right location. Make sure the setcap command is installed ( more information about capabilities here): sudo yum install libcapģ. In my case, this was /usr/bin/nmap: sudo chgrp adm /usr/bin/nmapĢ. Make sure that you use the right location of nmap. Restrict access to certain groups, for example adm. If you do not understand these risks, do not do this.ġ. It's possible, especially with elevated capabilities, for a clever person to use Nmap and NSE to escalate to full root privileges.
The Nmap Scripting Engine (NSE) allows scripts to sniff the network, change firewall roules and interface configuration, or exploit vulnerabilities including on localhost. I think it is important to keep this security warning in mind: The linked tutorial also describes this for Ubuntu and Red Hat systems, which should be good for you since you are on CentOS.
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This Wiki describes pretty good how to set everything up to run it as an unprivileged user. It is possible to run nmap as non-root user.
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