zapret/init.d/custom.d.examples.linux/10-keenetic-udp-fix
2024-12-09 09:28:25 +03:00

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# This script fixes keenetic issue with nfqws generated udp packets
# Keenetic uses proprietary ndmmark and does not masquerade without this mark
# If not masqueraded packets go to WAN with LAN IP and get dropped by ISP
# It's advised to set IFACE_WAN in config
zapret_custom_firewall()
{
# $1 - 1 - add, 0 - stop
local wan wanif rule
[ "$DISABLE_IPV4" = "1" ] || {
# use IFACE_WAN if defined. if not - search for interfaces with default route.
wanif=${IFACE_WAN:-$(sed -nre 's/^([^\t]+)\t00000000\t[0-9A-F]{8}\t[0-9A-F]{4}\t[0-9]+\t[0-9]+\t[0-9]+\t00000000.*$/\1/p' /proc/net/route | sort -u | xargs)}
for wan in $wanif; do
rule="-o $wan -p udp -m mark --mark $DESYNC_MARK/$DESYNC_MARK"
ipt_print_op $1 "$rule" "keenetic udp fix"
ipt_add_del $1 POSTROUTING -t nat $rule -j MASQUERADE
done
}
}