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FROM ubuntu:22.04

RUN apt-get update && apt-get install -y \
    openssh-server \
    dante-server \
    iptables \
    iproute2 \
    net-tools \
    curl \
    && rm -rf /var/lib/apt/lists/*

# Configure SSH
RUN mkdir -p /var/run/sshd
RUN useradd -m -s /bin/bash tunneluser

# Enable IP forwarding in /etc/sysctl.conf
RUN echo "net.ipv4.ip_forward=1" >> /etc/sysctl.conf
RUN sysctl -p

WORKDIR /app

COPY . /app

RUN chmod +x entrypoint.sh

ENTRYPOINT ["./entrypoint.sh"]