From 974292defee033bc43ccfcb2fcefc3eba3905340 Mon Sep 17 00:00:00 2001 From: Florian Westphal Date: Fri, 7 Jul 2017 13:29:03 +0200 Subject: [PATCH] netfilter: nf_tables: only allow in/output for arp packets arp packets cannot be forwarded. They can be bridged, but then they can be filtered using either ebtables or nftables bridge family. The bridge netfilter exposes a "call-arptables" switch which pushes packets into arptables, but lets not expose this for nftables, so better close this asap. Signed-off-by: Florian Westphal Signed-off-by: Pablo Neira Ayuso --- net/ipv4/netfilter/nf_tables_arp.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/net/ipv4/netfilter/nf_tables_arp.c b/net/ipv4/netfilter/nf_tables_arp.c index 805c8ddfe860..4bbc273b45e8 100644 --- a/net/ipv4/netfilter/nf_tables_arp.c +++ b/net/ipv4/netfilter/nf_tables_arp.c @@ -72,8 +72,7 @@ static const struct nf_chain_type filter_arp = { .family = NFPROTO_ARP, .owner = THIS_MODULE, .hook_mask = (1 << NF_ARP_IN) | - (1 << NF_ARP_OUT) | - (1 << NF_ARP_FORWARD), + (1 << NF_ARP_OUT), }; static int __init nf_tables_arp_init(void) -- 2.30.2