From a831a0ea78e0711a697f2fc18c25aef3e5a63c79 Mon Sep 17 00:00:00 2001
From: Tom Hughes <tom@compton.nu>
Date: Sun, 5 Mar 2023 17:28:14 +0000
Subject: [PATCH 1/1] Enable rate limits

---
 .../networking/resources/firewall_rule.rb      | 18 +++++++++---------
 .../templates/default/nftables.conf.erb        |  8 ++++----
 2 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/cookbooks/networking/resources/firewall_rule.rb b/cookbooks/networking/resources/firewall_rule.rb
index 665c0cb84..218a6b5f4 100644
--- a/cookbooks/networking/resources/firewall_rule.rb
+++ b/cookbooks/networking/resources/firewall_rule.rb
@@ -141,15 +141,15 @@ action_class do
       rule << "add @#{set} { #{ip} saddr ct count #{new_resource.connection_limit} }"
     end
 
-    # if new_resource.rate_limit =~ %r{^s:(\d+)/sec:(\d+)$}
-    #   set = "#{new_resource.rule}-#{ip}"
-    #   rate = Regexp.last_match(1)
-    #   burst = Regexp.last_match(2)
-    #
-    #   node.default[:networking][:firewall][:sets] << set
-    #
-    #   rule << "add @#{set} { #{ip} saddr limit rate #{rate}/second burst #{burst} packets }"
-    # end
+    if new_resource.rate_limit =~ %r{^s:(\d+)/sec:(\d+)$}
+      set = "ratelimit-#{new_resource.rule}-#{ip}"
+      rate = Regexp.last_match(1)
+      burst = Regexp.last_match(2)
+
+      node.default[:networking][:firewall][:sets] << set
+
+      rule << "add @#{set} { #{ip} saddr limit rate #{rate}/second burst #{burst} packets }"
+    end
 
     rule << case action
             when :accept then "accept"
diff --git a/cookbooks/networking/templates/default/nftables.conf.erb b/cookbooks/networking/templates/default/nftables.conf.erb
index 2545c97c8..140510c36 100644
--- a/cookbooks/networking/templates/default/nftables.conf.erb
+++ b/cookbooks/networking/templates/default/nftables.conf.erb
@@ -32,12 +32,12 @@ table inet filter {
     flags dynamic
   }
 
-  set limit-icmp-echo-ip {
+  set ratelimit-icmp-echo-ip {
     type ipv4_addr
     flags dynamic
   }
 
-  set limit-icmp-echo-ip6 {
+  set ratelimit-icmp-echo-ip6 {
     type ipv6_addr
     flags dynamic
   }
@@ -77,11 +77,11 @@ table inet filter {
     ct state { established, related } accept
 
     icmp type { destination-unreachable } accept
-    icmp type { echo-request } add @limit-icmp-echo-ip { ip saddr limit rate 1/second } accept
+    icmp type { echo-request } add @ratelimit-icmp-echo-ip { ip saddr limit rate 1/second } accept
     icmp type { echo-request } drop
 
     icmpv6 type { nd-neighbor-solicit, nd-neighbor-advert, nd-router-solicit, nd-router-advert } accept
-    icmpv6 type { echo-request } add @limit-icmp-echo-ip6 { ip6 saddr limit rate 1/second } accept
+    icmpv6 type { echo-request } add @ratelimit-icmp-echo-ip6 { ip6 saddr limit rate 1/second } accept
     icmpv6 type { echo-request } drop
 
     meta l4proto { icmp, icmpv6 } jump log-and-drop
-- 
2.39.5