This guide is based on Alpine 3.13 Distribution.

Getting MongoDB

Install MongoDB with package manager.

$ sudo apk update
$ sudo apk add mongodb

Run MongoDB server.

$ mkdir -p ./data/db
$ mongod --dbpath ./data/db

Setting up TUN device (No persistent after rebooting)

Create the TUN device. Interface name will be ogstun.

$ sudo apk add iproute2
$ sudo ip tuntap add name ogstun mode tun
$ ip link show

You are now ready to set the IP address on TUN device.

$ sudo ip addr add dev ogstun
$ sudo ip addr add 2001:db8:cafe::1/48 dev ogstun

Make sure it is set up properly.

$ sudo ip link set ogstun up
$ ip link show

Tip: The script provided in $GIT_REPO/misc/ makes it easy to configure the TUN device as follows: $ sudo ./misc/

Building Open5GS

Install the depedencies for building the source code.

$ sudo apk add alpine-sdk bison flex git cmake meson bash sudo linux-headers bsd-compat-headers yaml-dev lksctp-tools-dev gnutls-dev libgcrypt-dev libidn-dev mongo-c-driver-dev libmicrohttpd-dev curl-dev nghttp2-dev talloc-dev

Git clone.

$ git clone

To compile with meson:

$ cd open5gs
$ meson build --prefix=`pwd`/install
$ ninja -C build

Check whether the compilation is correct.

$ ./build/tests/attach/attach ## EPC Only
$ ./build/tests/registration/registration ## 5G Core Only

Run all test programs as below.

$ cd build
$ meson test -v

Tip: You can also check the result of ninja -C build test with a tool that captures packets. If you are running wireshark, select the loopback interface and set FILTER to s1ap || gtpv2 || pfcp || diameter || gtp || ngap || || http2.headers. You can see the virtually created packets. testattach.pcapng/testregistration.pcapng

You need to perform the installation process.

$ cd build
$ ninja install
$ cd ../

Building WebUI of Open5GS

Node.js is required to build WebUI of Open5GS

$ sudo apk add nodejs

Install the dependencies to run WebUI

$ cd webui
$ npm ci

The WebUI runs as an npm script.

$ npm run dev