Create SSL root certificate for Fritz!Box

create_cert.sh

#!/bin/sh

# solution found at
# https://github.com/webpack/webpack-dev-server/issues/854

# replace [IP] with the correct ip address
# assumes you have macports openssl installed. Alter -config path if needed.
openssl req \
    -newkey rsa:2048 \
    -x509 \
    -nodes \
    -keyout server.pem \
    -new \
    -out server.pem \
    -subj /CN=[IP] \
    -reqexts SAN \
    -extensions SAN \
    -config <(cat /opt/local/etc/openssl/openssl.cnf \
        <(printf '[SAN]\nsubjectAltName=IP:[IP]')) \
    -sha256 \
    -days 3650