ssh_exchange_identification: read: Connection reset by peer; ubuntu in Docker

Question

I'm trying to setup some Ubuntu images in Docker, to be used as honeypots.

I've followed a guide from here: https://github.com/mrschyte/dockerpot

This is a copy of the Docker file i use:

FROM ubuntu:16.04

RUN apt-get update && apt-get install -y openssh-server
RUN mkdir /var/run/sshd
RUN echo 'root:screencast' | chpasswd
RUN sed -i 's/PermitRootLogin prohibit-password/PermitRootLogin yes/' /etc/ssh/sshd_config

# SSH login fix. Otherwise user is kicked off after login
RUN sed 's@session\s*required\s*pam_loginuid.so@session optional pam_loginuid.so@g' -i /etc/pam.d/sshd

ENV NOTVISIBLE "in users profile"
RUN echo "export VISIBLE=now" >> /etc/profile

EXPOSE 22
CMD ["/usr/sbin/sshd", "-D"]

Running docker ps I can see that the contrainers are created:

CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
b7c1962cfc27        def9be976ec5        "/sbin/init"        45 minutes ago      Up 19 minutes       22/tcp              honeypot-192.168.122.1

but when I try to connect to them from my machine, the connection is reset with the error: ssh_exchange_identification: read: Connection reset by peer

Answer 1

Removing /sbin/init from the init script, fixed the issue.

Something about this should not be used in docker as it may not initialize the services.