Smap - A Drop-In Replacement For Nmap Powered By Shodan.Io

Smap is a replica of Nmap which uses shodan.io's free API for port scanning. It takes same command line arguments as Nmap and produces the same output which makes it a drop-in replacament for Nmap.

Features

Scans 200 hosts per second
Doesn't require any account/api key
Vulnerability detection
Supports all nmap's output formats
Service and version fingerprinting
Makes no contact to the targets

Installation

Binaries

You can download a pre-built binary from here and use it right away.

Manual

go install -v github.com/s0md3v/smap/cmd/[email protected]

Confused or something not working? For more detailed instructions, click here

AUR pacakge

Smap is available on AUR as smap-git (builds from source) and smap-bin (pre-built binary).

Homebrew/Mac

Smap is also avaible on Homebrew.

brew update
brew install smap

Usage

Smap takes the same arguments as Nmap but options other than -p, -h, -o*, -iL are ignored. If you are unfamiliar with Nmap, here's how to use Smap.

Specifying targets

You can also use a list of targets, seperated by newlines.

Supported formats

1.1.1.1         // IPv4 address
example.com     // hostname
178.23.56.0/8   // CIDR

Output

Smap supports 6 output formats which can be used with the -o* as follows

smap example.com -oX output.xml

If you want to print the output to terminal, use hyphen (-) as filename.

Supported formats

oX    // nmap's xml format
oG    // nmap's greppable format
oN    // nmap's default format
oA    // output in all 3 formats above at once
oP    // IP:PORT pairs seperated by newlines
oS    // custom smap format
oJ    // json

Note: Since Nmap doesn't scan/display vulnerabilities and tags, that data is not available in nmap's formats. Use -oS to view that info.

Specifying ports

Smap scans these 1237 ports by default. If you want to display results for certain ports, use the -p option.

smap -p21-30,80,443 -iL targets.txt

Considerations

Since Smap simply fetches existent port data from shodan.io, it is super fast but there's more to it. You should use Smap if:

You want

vulnerability detection
a super fast port scanner
results for most common ports (top 1237)
no connections to be made to the targets

You are okay with

not being able to scan IPv6 addresses
results being up to 7 days old
a few false negatives