Increase MaxConnections and MaxStartup

Dockerfile

@@ -91,13 +91,21 @@ FROM mpioperator/openmpi:0.4.0 AS production
 # Provides nslookup for NNF Containers. Used for MPI Launcher InitContainers.
 RUN apt-get update && apt-get install -y dnsutils && rm -rf /var/lib/apt/lists/*
 
+# TODO remove this:
+RUN apt-get update && apt-get install -y vim
+
 COPY --from=builder /deps/libcircle/lib/ /usr
 COPY --from=builder /deps/libarchive/lib/ /usr
 COPY --from=builder /deps/lwgrp/lib/ /usr
 COPY --from=builder /deps/dtcmp/lib/ /usr
 
 COPY --from=builder /mfu/ /usr
 
+# Configure the ssh server to allow 512 unsecured connections that occur before authentication is
+# completed.
+RUN sed -i "s/[ #]\(.*MaxSessions\).*/\1 512/g" /etc/ssh/sshd_config \
+    && sed -i "s/[ #]\(.*MaxStartups\).*/\1 512/g" /etc/ssh/sshd_config
+
 ###############################################################################
 # Pull in the debugging symbols on top of production image
 FROM production AS debug