diff --git a/main.sh b/main.sh
index a8b9ac7..11c3663 100755
--- a/main.sh
+++ b/main.sh
@@ -17,6 +17,12 @@ if [[ ! "$MYIP" =~ ^([1-9]?[0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.([1-9]?[0-9]|1[
 fi
 
 # fetch current record with dig, and choose what to do
+# TODO we should probably improve this choice: current implementation prevents hosts that do not have a record yet to register themselves; We'd need to differentiate cases:
+# * correct ip, not the same -> OK, need to update
+# * correct ip, the same -> OK, nothing to do
+# * no result, name server was reachable -> OK, need to register
+# * no result, name server was not reachable -> NOK, abort
+# * result which is not a correct ip -> NOK, abort
 current_ip_record=$(dig $FQDN +short)
 if [[ "$current_ip_record" =~ ^([1-9]?[0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.([1-9]?[0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.([1-9]?[0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.([1-9]?[0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$ ]]; then
   if [[ ! "$MYIP" = "$current_ip_record" ]]; then