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#!/bin/bash
set -e
tmpfile=$(mktemp)
if [ ! -w $tmpfile ] ; then
echo "Failed to create tmp file" >&2
exit 0
fi
trap "rm -rf $tmpfile" EXIT # cleanup if aborted
RULESET="add table x
add chain x y
delete chain x y
delete table x
add table x
add chain x y { type filter hook input priority 0; }
add chain x y { policy drop; }
flush ruleset
add table w
add chain w y { type filter hook output priority 0; }"
echo "$RULESET" > $tmpfile
$NFT -f $tmpfile
if [ $? -ne 0 ] ; then
echo "E: unable to load good ruleset" >&2
exit 1
fi
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