diff -Nur ipdbtools/Makefile ipdbtools.new/Makefile
--- ipdbtools/Makefile	2021-04-07 10:06:21.000000000 +0200
+++ ipdbtools.new/Makefile	2022-07-19 17:36:51.563579000 +0200
@@ -15,12 +15,19 @@
 GH_ACCOUNT=	cyclaero
 GH_PROJECT=	ipdb
 
+SUB_FILES=	800.ipdb-update pkg-message
 PLIST_FILES=	bin/ipup \
 		bin/ipdb \
 		bin/ipdb-update.sh \
 		man/man1/ipdbtools.1.gz \
 		man/man1/ipup.1.gz \
 		man/man1/ipdb.1.gz \
-		man/man1/ipdb-update.sh.1.gz
+		man/man1/ipdb-update.sh.1.gz \
+		etc/periodic/weekly/800.ipdb-update
+
+post-install:
+	${MKDIR} ${STAGEDIR}${PREFIX}/etc/periodic/weekly
+	${INSTALL_SCRIPT} ${WRKDIR}/800.ipdb-update \
+		${STAGEDIR}${PREFIX}/etc/periodic/weekly/800.ipdb-update
 
 .include <bsd.port.mk>
diff -Nur ipdbtools/files/800.ipdb-update.in ipdbtools.new/files/800.ipdb-update.in
--- ipdbtools/files/800.ipdb-update.in	1970-01-01 01:00:00.000000000 +0100
+++ ipdbtools.new/files/800.ipdb-update.in	2022-07-19 17:40:49.719205000 +0200
@@ -0,0 +1,33 @@
+#!/bin/sh
+
+# Update the ipdb database.
+#
+# Add the following lines to /etc/periodic.conf:
+#
+# weekly_ipdb_update_enable (bool):     Set to "NO" by default
+
+# If there is a global system configuration file, suck it in.
+#
+if [ -r /etc/defaults/periodic.conf ]
+then
+    . /etc/defaults/periodic.conf
+    source_periodic_confs
+fi
+
+case "$weekly_ipdb_update_enable" in
+    [Yy][Ee][Ss])
+        echo
+        echo "Updating ipdb database:"
+
+        anticongestion
+
+        %%LOCALBASE%%/bin/ipdb-update.sh
+        rc=$?
+        if [ $rc != 0 ]; then
+            echo "**** ipdb-update.sh exitted with $rc."
+            exit 3
+        fi
+        ;;
+esac
+
+exit 0
diff -Nur ipdbtools/files/pkg-message.in ipdbtools.new/files/pkg-message.in
--- ipdbtools/files/pkg-message.in	1970-01-01 01:00:00.000000000 +0100
+++ ipdbtools.new/files/pkg-message.in	2022-07-19 17:32:36.084840000 +0200
@@ -0,0 +1,11 @@
+[
+{ type: install
+  message: <<EOM
+In order to automatically update the ipdb database, add this line to
+/etc/periodic.conf:
+
+    weekly_ipdb_update_enable="YES"
+
+EOM
+}
+]