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authorGuilhem Moulin <guilhem@fripost.org>2020-11-15 18:42:00 +0100
committerGuilhem Moulin <guilhem@fripost.org>2020-11-15 18:42:00 +0100
commit8e09a3277931c307e17d037b826fb8efd8979c2d (patch)
tree98da320af8656d5c56dc93e9846a96a58e445403
parent4d2a5f9e1ab9fb1c2c8a3bea5e286fa2ad953d6e (diff)
Firewall: Add counter to dropped ICMP packets.
-rwxr-xr-xroles/common/templates/etc/nftables.conf.j22
1 files changed, 1 insertions, 1 deletions
diff --git a/roles/common/templates/etc/nftables.conf.j2 b/roles/common/templates/etc/nftables.conf.j2
index cc79671..33407c9 100755
--- a/roles/common/templates/etc/nftables.conf.j2
+++ b/roles/common/templates/etc/nftables.conf.j2
@@ -51,41 +51,41 @@ table netdev filter {
{% set addr = (ansible_facts[if].ipv4 | default({'address': '0.0.0.0'})).address %}
chain INGRESS-{{ if }} {
type filter hook ingress device {{ if }} priority -499
policy accept
# IPsec traffic (refined later in the filter rule)
ip saddr {{ ipsec_subnet }} ip daddr {{ ipsec[inventory_hostname_short] }} meta secpath exists accept
# rate-limiting is done directly by the kernel (net.ipv4.icmp_{ratelimit,ratemask} runtime options)
icmp type { echo-reply, echo-request, destination-unreachable, time-exceeded } counter accept
icmpv6 type { echo-reply, echo-request, destination-unreachable,
packet-too-big, time-exceeded, parameter-problem } counter accept
# accept neighbour discovery for autoconfiguration, RFC 4890 sec. 4.4.1
ip6 hoplimit 255 icmpv6 type { 133,134,135,136,141,142 } counter accept
# accept link-local multicast receiver notification messages
ip6 saddr fe80::/10 ip6 daddr ff02::/16 ip6 hoplimit 1 icmpv6 type { 130,131,132,143 } counter accept
# drop all remaining ICMP/ICMPv6 traffic
- meta l4proto { icmp, icmpv6 } drop
+ meta l4proto { icmp, icmpv6 } counter drop
# bogon filter (cf. RFC 6890 for non-global ip addresses)
define bogon = {
0.0.0.0/8 # this host, on this network (RFC 1122 sec. 3.2.1.3)
{% if not addr | ipaddr('10.0.0.0/8') %}
, 10.0.0.0/8 # private-use (RFC 1918)
{% endif %}
, 100.64.0.0/10 # shared address space (RFC 6598)
, 127.0.0.0/8 # loopback (RFC 1122, sec. 3.2.1.3)
, 169.254.0.0/16 # link local (RFC 3927)
{% if not addr | ipaddr('172.16.0.0/12') %}
, 172.16.0.0/12 # private-use (RFC 1918)
{% endif %}
, 192.0.0.0/24 # IETF protocol assignments (RFC 6890 sec. 2.1)
, 192.0.2.0/24 # documentation (RFC 5737)
{% if not addr | ipaddr('192.168.0.0/16') %}
, 192.168.0.0/16 # private-use (RFC 1918)
{% endif %}
, 198.18.0.0/15 # benchmarking (RFC 2544)
, 198.51.100.0/24 # documentation (RFC 5737)