+## `greet' utility for stimulating passive connections.
+if HAVE_PYTHON
+noinst_SCRIPTS += greet
+EXTRA_DIST += greet.in
+CLEANFILES += greet
+
+greet: greet.in Makefile
+ $(SUBST) $(srcdir)/greet.in >$@.new $(SUBSTITUTIONS) && \
+ chmod +x $@.new && mv $@.new $@
+endif
+
+## `knock' script for accepting incoming dynamic associations.
+noinst_SCRIPTS += knock
+EXTRA_DIST += knock.in
+CLEANFILES += knock
+
+knock: knock.in Makefile
+ $(SUBST) $(srcdir)/knock.in >$@.new $(SUBSTITUTIONS) && \
+ chmod +x $@.new && mv $@.new $@
+