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FROM python:3-slim
WORKDIR /
# Update the image to remediate any vulnerabilities.
RUN apt clean && apt update && apt -y dist-upgrade && apt clean && rm -rf /var/lib/apt/lists/*
# Remove suid & sgid bits from all files.
RUN find / -xdev -perm /6000 -exec chmod ug-s {} \; 2> /dev/null || true
# Copy the ssh-audit code.
COPY ssh-audit.py .
COPY src/ .
# Allow listening on 2222/tcp for client auditing.
EXPOSE 2222
# Drop root privileges.
USER nobody:nogroup
ENTRYPOINT ["python3", "/ssh-audit.py"]
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