X-Git-Url: https://git.distorted.org.uk/~mdw/firewall/blobdiff_plain/1ee6211dcd0063197621004e6c7073bd801b8efe..429f4314d0d1be69f7500cf7f97671595804fdd0:/classify.m4

diff --git a/classify.m4 b/classify.m4
index fcb008d..25b1693 100644
--- a/classify.m4
+++ b/classify.m4
@@ -69,11 +69,14 @@ clearchain mangle:local-source
 ## of weird stuff happens on lo, and it's best not to second-guess it.
 run ip46tables -t mangle -A in-classify -i lo -j ACCEPT
 
-## Local bootp packets have bizarre addresses.  Don't block them just because
-## of this.
+## Local broadcast and link-local multicast packets sometimes have bizarre
+## addresses.  Don't block them just because of this.
 run iptables -t mangle -A in-classify -j RETURN \
 	-s 0.0.0.0 -d 255.255.255.255 \
-	-p udp --source-port $port_bootpc --destination-port $port_bootps
+	-p udp
+run iptables -t mangle -A in-classify -j RETURN \
+	-s 0.0.0.0 -d 224.0.0.0/24 \
+	-p udp
 
 ## Since packets with source and destination addresses both local will go
 ## over the loopback interface, I shouldn't see a packet from me over any