Update

dns/Dockerfile

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+FROM ubuntu:24.04
+
+RUN apt-get update && \
+    apt-get install -y \
+        bind9 \
+        vim \
+        nano \
+        dnsutils \
+        tcpdump \
+        traceroute \
+        && rm -rf /var/lib/apt/lists/*
+
+COPY start.sh /start.sh
+EXPOSE 53
+CMD ["/bin/sh", "/start.sh"]

dns/build.sh

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+#!/bin/sh
+sudo docker build -t pierre42100/gns3-appliance-dns .

dns/start.sh

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+#!/bin/sh
+/usr/sbin/named
+while true; do /bin/bash; done