X-Git-Url: https://git.openstreetmap.org./chef.git/blobdiff_plain/a7d96c8358a00088b485fadb5966eb4b231d2ff1..ff044920428608b2c04507ad52d6ab52c9d6555f:/roles/base.rb?ds=inline

diff --git a/roles/base.rb b/roles/base.rb
index 15c913d3d..b38d5ce16 100644
--- a/roles/base.rb
+++ b/roles/base.rb
@@ -31,7 +31,7 @@ default_attributes(
     },
     :network_buffers => {
       :comment => "Tune network buffers",
-      :parameters => { 
+      :parameters => {
         "net.core.rmem_max" => "16777216",
         "net.core.wmem_max" => "16777216",
         "net.ipv4.tcp_rmem" => "4096\t87380\t16777216",
@@ -44,14 +44,14 @@ default_attributes(
     },
     :network_conntrack_established => {
       :comment => "Only track established connections for four hours",
-      :parameters => { 
+      :parameters => {
         "net.netfilter.nf_conntrack_tcp_timeout_established" => "14400"
       }
     },
     :tcp_syncookies => {
-      :comment => "Turn off syncookies as they interact badly with the firewall",
+      :comment => "Turn on syncookies to protect against SYN floods",
       :parameters => {
-        "net.ipv4.tcp_syncookies" => "0"
+        "net.ipv4.tcp_syncookies" => "1"
       }
     }
   },
@@ -60,7 +60,7 @@ default_attributes(
       :comment => "Tune the ondemand CPU frequency governor",
       :parameters => {
         "devices/system/cpu/cpufreq/ondemand/up_threshold" => "25",
-        "devices/system/cpu/cpufreq/ondemand/sampling_down_factor" => "10"
+        "devices/system/cpu/cpufreq/ondemand/sampling_down_factor" => "100"
       }
     }
   }
@@ -79,5 +79,6 @@ run_list(
   "recipe[openssh]",
   "recipe[sysctl]",
   "recipe[sysfs]",
-  "recipe[tools]"
+  "recipe[tools]",
+  "recipe[fail2ban]"
 )