scan the entire Internet in less than an hour.

Researchers have developed a method that allows them to scan the entire Internet in less than an hour. The method is an open-source network scanner called ZMap, and researchers from the University of Michigan created it as a method to expose vulnerabilities in networks, develop appropriate defensive mechanisms, and conduct more efficient research.

ZMap surveys every IP address on the Internet, a process that usually can take months. ZMap manages to accomplish this task in about 45 minutes, all from a single machine, while approaching incredible speed.

ZMap is developed for use on Linux on 64-bit systems and can be built with most recent versions of gcc. ZMap requires GMP, libpcap, and Gengetopt. These can be installed as follows:

Debian or Ubuntu: sudo apt-get install libgmp3-dev libpcap-dev gengetopt

Fedora, Red Hat Enterprise Linux, or CentOS: sudo yum install gmp gmp-devel libpcap-devel gengetopt

Once these requirements have been installed, ZMap can be installed by running cd src; make and sudo make install.

Redis support is not enabled by default. If you want to use ZMap with Redis, you will first need to install Hiredis. Then, rebuild ZMap with the command make REDIS=true. If you don't want to run ZMap as root, you can give the binary permission to use the raw network with setcap cap_net_raw=ep /usr/local/sbin/zmap

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