Dockerfile.ssh-test

FROM ubuntu:22.04

# Disable IPv6 to avoid connection issues
RUN echo 'Acquire::ForceIPv4 "true";' > /etc/apt/apt.conf.d/99force-ipv4

# Install SSH server and dependencies with retries
RUN apt-get update && \
    apt-get install -y \
    openssh-server \
    sudo \
    curl \
    git \
    vim \
    net-tools && \
    apt-get clean && \
    rm -rf /var/lib/apt/lists/*

# Create SSH directory
RUN mkdir -p /var/run/sshd

# Create test user
RUN useradd -rm -d /home/testuser -s /bin/bash -g users -G sudo -u 1001 testuser && \
    echo 'testuser:testpass' | chpasswd

# Allow password authentication
RUN sed -i 's/#PasswordAuthentication yes/PasswordAuthentication yes/' /etc/ssh/sshd_config && \
    sed -i 's/PasswordAuthentication no/PasswordAuthentication yes/' /etc/ssh/sshd_config && \
    sed -i 's/#PermitRootLogin prohibit-password/PermitRootLogin yes/' /etc/ssh/sshd_config

# Create .ssh directory with proper permissions
RUN mkdir -p /home/testuser/.ssh && \
    chown -R testuser:users /home/testuser/.ssh && \
    chmod 700 /home/testuser/.ssh

# Expose SSH port
EXPOSE 22

# Start SSH service
CMD ["/usr/sbin/sshd", "-D"]