Implementation of a simple port scanner in Go, mirroring the output of nmap.
> port-scanner -hostname mlesniak.com -parallel 20 -port 75-85 -timeout 1
PORT STATUS SERVICE
75/tcp closed
76/tcp closed deos
77/tcp closed
78/tcp closed vettcp
79/tcp closed finger
80/tcp open www-http
81/tcp closed
82/tcp closed xfer
83/tcp closed mit-ml-dev
84/tcp closed ctf
85/tcp closed mit-ml-dev
A list of available command line options can be obtained by executing
> port-scanner -help
A simple port scanner in go.
-hostname string
hostname of the target system
-parallel int
Maximum number of parallel connections (default 1)
-port string
a single port (80) or a single range (80-1024)
-timeout float
Timeout in seconds. Fractional values, e.g. 0.5 are allowed (default 1)
To build and install port-scanner under $GOPATH you have to
git clone [email protected]:mlesniak/port-scanner.git
go install
We use go-bindata to embed files in data/, hence to build
bindata.go, you have to
go-bindata data/
If you have not installed go-bindata, use
go get -u github.com/a-urth/go-bindata/...
beforehand.
To reduce the file size, use upx and
go build && strip port-scanner && upx -9 port-scanner
to create a 1MB single static file, e.g. for using it in docker containers.
Building port-scanner with Docker is simple
git clone [email protected]:mlesniak/port-scanner.git
cd port-scanner
docker build -t port-scanner .
docker run --rm port-scanner -hostname mlesniak.com -parallel 20 -port 75-85 -timeout 1
To export the static binary simply run
docker run --rm --entrypoint="" port-scanner cat /usr/local/bin/port-scanner > port-scanner
While this application is feature complete for my usages, the following limitations apply:
- Scanning of TCP ports only.
- Service list maps only single range ports, i.e. xwindow's definition from 6000-6003 is currently not correctly mapped
If these limitations annoy you, either fix this yourself and write a pull request :-) or open an issue.
A Trello Board can be found here.
The source code is licensed under the Apache license