diff --git a/docs/Concepts/DNS.md b/docs/Concepts/DNS.md
index 1269c4a..451c394 100644
--- a/docs/Concepts/DNS.md
+++ b/docs/Concepts/DNS.md
@@ -3,30 +3,34 @@
 ```mermaid
 flowchart LR
   subgraph External
-  recursor
-  GandiDns[ Gandi ducamps.win]
+  externalRecursor[recursor]
+  GandiDns[ hetzner ducamps.win]
   end
   subgraph Internal
-  pihole[pihole]----ducamps.win-->NAS
+  pihole[pihole]--ducamps.win-->NAS
   pihole--service.consul-->consul[consul cluster]
+  pihole--->recursor
+  recursor--service.consul-->consul
   DHCP --dynamic update--> NAS
-  NAS--service.consul-->consul
+  NAS
+  recursor--ducamps.win-->NAS
+  consul--service.consul--->consul
+  clients--->pihole
+  clients--->recursor
   end
-  NAS --> recursor
-  pihole --> recursor
-
+  pihole --> externalRecursor
+  recursor-->External
 ```
 
 ## Detail
 
-Pihole container in nomad cluster is set as primary DNS as add blocker secondary DNS is locate on NAS
+Pihole container in nomad cluster is set as primary DNS as add blocker secondary DNS recursore is locate on gerard
 
-DNS locate on NAS manage domain *ducamps.win* on local network pihole forward each request on *ducamps.win* to this DNS.
+DNS locate on NAS manage domain *ducamps.win* on local network each recursor forward each request on *ducamps.win* to this DNS.
 
-Each DNS forward *service.consul* request to the consul cluster. On Pihole a template configure each consul server.
-
-On diskstation every request as forward to one consul node this point is to improve we because we have a possibility of outtage. du to synology DNSServer limitation we only put a forward on port 53 so we need on the target consul node to redirect port 53 to 8300 by iptables rules.
+Each DNS forward *service.consul* request to the consul cluster. 
+Each consul node have a consul redirection in systemd-resolved to theire own consul client
 
 a DHCP service is set to do dynamic update on NAS DNS on lease delivery
 
-external recursor are on cloudflare and FDN
+external recursor are set on pihole on cloudflare and FDN in case of recursors faillure