92 lines
2.5 KiB
Bash
Executable File
92 lines
2.5 KiB
Bash
Executable File
#!/usr/bin/env bash
|
|
#
|
|
# update-spamhaus-nftables.sh v0.0.1
|
|
#
|
|
# Download Spamhaus DROP lists and load them into nftables sets.
|
|
#
|
|
# See: https://www.spamhaus.org/drop/
|
|
#
|
|
# Copyright (C) 2021 Alan Orth
|
|
#
|
|
# SPDX-License-Identifier: GPL-3.0-only
|
|
|
|
# Exit on first error
|
|
set -o errexit
|
|
|
|
spamhaus_ipv4_set_path=/etc/nftables/spamhaus-ipv4.nft
|
|
spamhaus_ipv6_set_path=/etc/nftables/spamhaus-ipv6.nft
|
|
|
|
function download() {
|
|
echo "Downloading $1"
|
|
wget -q -O - "https://www.spamhaus.org/drop/$1" > "$1"
|
|
}
|
|
|
|
download drop.txt
|
|
download edrop.txt
|
|
download dropv6.txt
|
|
|
|
if [[ -f "drop.txt" && -f "edrop.txt" ]]; then
|
|
echo "Processing IPv4 DROP lists"
|
|
|
|
spamhaus_ipv4_list_temp=$(mktemp)
|
|
spamhaus_ipv4_set_temp=$(mktemp)
|
|
|
|
# Extract all networks from drop.txt and edrop.txt, skipping blank lines and
|
|
# comments. Use aggregate-cidr-addresses.pl to merge overlapping IPv4 CIDR
|
|
# ranges to work around a firewalld bug.
|
|
#
|
|
# See: https://bugzilla.redhat.com/show_bug.cgi?id=1836571
|
|
cat drop.txt edrop.txt | sed -e '/^$/d' -e '/^;.*/d' -e 's/[[:space:]];[[:space:]].*//' | aggregate-cidr-addresses.pl > "$spamhaus_ipv4_list_temp"
|
|
|
|
echo "Building spamhaus-ipv4 set"
|
|
cat << NFT_HEAD > "$spamhaus_ipv4_set_temp"
|
|
#!/usr/sbin/nft -f
|
|
|
|
define SPAMHAUS_IPV4 = {
|
|
NFT_HEAD
|
|
|
|
while read -r network; do
|
|
# nftables doesn't mind if the last element in the set has a trailing
|
|
# comma so we don't need to do anything special here.
|
|
echo "$network," >> "$spamhaus_ipv4_set_temp"
|
|
done < $spamhaus_ipv4_list_temp
|
|
|
|
echo "}" >> "$spamhaus_ipv4_set_temp"
|
|
|
|
install -m 0600 "$spamhaus_ipv4_set_temp" "$spamhaus_ipv4_set_path"
|
|
|
|
rm -f "$spamhaus_ipv4_list_temp" "$spamhaus_ipv4_set_temp"
|
|
fi
|
|
|
|
if [[ -f "dropv6.txt" ]]; then
|
|
echo "Processing IPv6 DROP lists"
|
|
|
|
spamhaus_ipv6_list_temp=$(mktemp)
|
|
spamhaus_ipv6_set_temp=$(mktemp)
|
|
|
|
sed -e '/^$/d' -e '/^;.*/d' -e 's/[[:space:]];[[:space:]].*//' dropv6.txt > "$spamhaus_ipv6_list_temp"
|
|
|
|
echo "Building spamhaus-ipv6 set"
|
|
cat << NFT_HEAD > "$spamhaus_ipv6_set_temp"
|
|
#!/usr/sbin/nft -f
|
|
|
|
define SPAMHAUS_IPV6 = {
|
|
NFT_HEAD
|
|
|
|
while read -r network; do
|
|
echo "$network," >> "$spamhaus_ipv6_set_temp"
|
|
done < $spamhaus_ipv6_list_temp
|
|
|
|
echo "}" >> "$spamhaus_ipv6_set_temp"
|
|
|
|
install -m 0600 "$spamhaus_ipv6_set_temp" "$spamhaus_ipv6_set_path"
|
|
|
|
rm -f "$spamhaus_ipv6_list_temp" "$spamhaus_ipv6_set_temp"
|
|
fi
|
|
|
|
echo "Reloading nftables"
|
|
# The spamhaus nftables sets are included by nftables.conf
|
|
/usr/sbin/nft -f /etc/nftables.conf
|
|
|
|
rm -v drop.txt edrop.txt dropv6.txt
|