X-Git-Url: https://git.openstreetmap.org/chef.git/blobdiff_plain/a7d96c8358a00088b485fadb5966eb4b231d2ff1..f65e00b3c6d99221a4783c75d50a4df10f3cad52:/roles/base.rb

diff --git a/roles/base.rb b/roles/base.rb
index 15c913d3d..529d23ba4 100644
--- a/roles/base.rb
+++ b/roles/base.rb
@@ -11,14 +11,14 @@ default_attributes(
     }
   },
   :apt => {
-    :sources => [ "openstreetmap" ]
+    :sources => ["openstreetmap"]
   },
   :networking => {
     :roles => {
       :internal => { :metric => 200, :zone => "loc" },
       :external => { :metric => 100 }
     },
-    :search => [ "openstreetmap.org" ]
+    :search => ["openstreetmap.org"]
   },
   :sysctl => {
     :panic => {
@@ -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]"
 )