X-Git-Url: https://git.openstreetmap.org/chef.git/blobdiff_plain/4995554e7b535b58f0f730eca6e6df9082aad083..408f8f15779069865660e5d3215d235688a920ce:/roles/ucl.rb

diff --git a/roles/ucl.rb b/roles/ucl.rb
index f3a030595..eb3dfd1cd 100644
--- a/roles/ucl.rb
+++ b/roles/ucl.rb
@@ -19,6 +19,15 @@ default_attributes(
         }
       }
     }
+  },
+  :sysctl => {
+    :blackhole => {
+      :comment => "Force TCP level MTU probing because of known ICMP blackhole at UCL",
+      :parameters => {
+        "net.ipv4.tcp_mtu_probing" => "2",
+        "net.ipv4.tcp_base_mss" => "1024"
+      }
+    }
   }
 )
 
@@ -28,7 +37,7 @@ override_attributes(
     :search => ["ucl.openstreetmap.org", "openstreetmap.org"]
   },
   :ntp => {
-    :servers => ["0.uk.pool.ntp.org", "1.uk.pool.ntp.org", "europe.pool.ntp.org"]
+    :servers => ["ntp1.ucl.ac.uk", "ntp2.ucl.ac.uk"]
   }
 )