diff --git a/site.conf b/site.conf
index 7de183d949d944d8b30efda80513db6ef04211ab..6b2ad6d5b2c082194be6bf2e0c16381a473765b6 100644
--- a/site.conf
+++ b/site.conf
@@ -12,8 +12,9 @@
 
 	timezone = 'CET-1CEST,M3.5.0,M10.5.0/3', -- Europe/Berlin
 	ntp_servers = {
-			'1.pool.ntp.org',
-			'ntp1.ptb.de',
+			'1.ntp.services.ffnord',
+			'2.ntp.services.ffnord',
+			'3.ntp.services.ffnord',
 		      },
 	regdom = 'DE',
 
@@ -61,7 +62,7 @@
 		mtu = 1280,
 		groups = {
 			backbone = {
-				limit = 2,
+				limit = 1,
 				peers = {
 					ffnord_vpn0 = {
 						key = '3dd48007765a0392244df2f3b627c487bae1269d242278140ab6caac1e5f5f34',