diff --git a/templates/interface/Debian.erb b/templates/interface/Debian.erb
index 6c2b3e3..2aebec2 100644
--- a/templates/interface/Debian.erb
+++ b/templates/interface/Debian.erb
@@ -1,3 +1,4 @@
+# File Managed by Puppet
 # Interface <%= @name %>
 <% if @description and ! @description.empty? -%>
 # <%= @description %>
diff --git a/templates/route_down-Debian.erb b/templates/route_down-Debian.erb
index 7c06013..f4f4301 100644
--- a/templates/route_down-Debian.erb
+++ b/templates/route_down-Debian.erb
@@ -10,3 +10,5 @@ if [ "$IFACE" = "<%= @interface -%>" ] || [ "$IFACE" = "--all" ]; then
   fi
 <%- end -%>
 fi
+# non-zero exit code causes ifupdown to leave the interface partly configured, which may result in connectivity loss
+exit 0
diff --git a/templates/route_up-Debian.erb b/templates/route_up-Debian.erb
index 7dcfbc0..c4733c6 100644
--- a/templates/route_up-Debian.erb
+++ b/templates/route_up-Debian.erb
@@ -10,3 +10,5 @@ if [ "$IFACE" = "<%= @interface -%>" ] || [ "$IFACE" = "--all" ]; then
   fi
 <%- end -%>
 fi
+# non-zero exit code causes ifupdown to leave the interface partly configured, which may result in connectivity loss
+exit 0
diff --git a/templates/rule_down-Debian.erb b/templates/rule_down-Debian.erb
index 20e6b15..26fa6dd 100644
--- a/templates/rule_down-Debian.erb
+++ b/templates/rule_down-Debian.erb
@@ -10,3 +10,5 @@ if [ "$IFACE" = "<%= @interface -%>" ] || [ "$IFACE" = "--all" ]; then
   fi
 <%- end -%>
 fi
+# non-zero exit code causes ifupdown to leave the interface partly configured, which may result in connectivity loss
+exit 0
diff --git a/templates/rule_up-Debian.erb b/templates/rule_up-Debian.erb
index 0ba92be..f1f1626 100644
--- a/templates/rule_up-Debian.erb
+++ b/templates/rule_up-Debian.erb
@@ -10,3 +10,5 @@ if [ "$IFACE" = "<%= @interface -%>" ] || [ "$IFACE" = "--all" ]; then
   fi
 <%- end -%>
 fi
+# non-zero exit code causes ifupdown to leave the interface partly configured, which may result in connectivity loss
+exit 0