fwknopd
FireWall KNock OPerator: Single Packet Authorization and Port Knocking
RUN apt-get update && \
apt-get install -y fwknop-server
RUN apt-get update && \
apt-get install -y fwknop-server
RUN pacman -S --noconfirm fwknop
RUN apt-get update && \
apt-get install -y fwknop-server
RUN dnf install -y fwknop
RUN apt-get update && \
apt-get install -y fwknop-server