diff --git a/docs/roles/debian/mysql_server_oracle_ce.md b/docs/roles/debian/mysql_server_oracle_ce.md
index b081b2498..7ee28b24d 100644
--- a/docs/roles/debian/mysql_server_oracle_ce.md
+++ b/docs/roles/debian/mysql_server_oracle_ce.md
@@ -10,7 +10,7 @@ Installs MySQL Server 5.7.
 ---
 mysql_long_query_time: 4
 mysql_server_oracle_ce_key: "8C718D3B5072E1F5" # archive key - see https://dev.mysql.com/doc/refman/8.0/en/gpg-key-archived-packages.html
-mysql_server_oracle_ce_key_server: pgp.mit.edu
+mysql_server_oracle_ce_key_server: keyserver.ubuntu.com
 ```
 
 <!--ENDROLEVARS-->
diff --git a/docs/roles/debian/wazuh.md b/docs/roles/debian/wazuh.md
index f6efaa7ca..bd4afb89b 100644
--- a/docs/roles/debian/wazuh.md
+++ b/docs/roles/debian/wazuh.md
@@ -40,7 +40,7 @@ wazuh:
   indexer:
     install: false # install the indexer packages
     single_node: true
-    domain_name: "{{ _domain_name }}"
+    domain_name: indexer.example.com # possible to use "{{ _domain_name }}" in local variables, but not defaults
     indexer_cluster_name: wazuh
     indexer_node_name: node-1 # this server name
     indexer_network_host: 127.0.0.1
@@ -154,7 +154,7 @@ wazuh:
     dashboard_node_name: node-1
     dashboard_server_host: "0.0.0.0"
     dashboard_server_port: "443" # if you want to use provided SSL certificates install a web server and proxy to Wazuh
-    dashboard_server_name: "{{ _domain_name }}"
+    dashboard_server_name: dashboard.example.com # possible to use "{{ _domain_name }}" in local variables, but not defaults
     dashboard_conf_path: "/etc/wazuh-dashboard/"
     wazuh_api_credentials:
       - id: "default"
diff --git a/roles/debian/mysql_server_oracle_ce/README.md b/roles/debian/mysql_server_oracle_ce/README.md
index b081b2498..7ee28b24d 100644
--- a/roles/debian/mysql_server_oracle_ce/README.md
+++ b/roles/debian/mysql_server_oracle_ce/README.md
@@ -10,7 +10,7 @@ Installs MySQL Server 5.7.
 ---
 mysql_long_query_time: 4
 mysql_server_oracle_ce_key: "8C718D3B5072E1F5" # archive key - see https://dev.mysql.com/doc/refman/8.0/en/gpg-key-archived-packages.html
-mysql_server_oracle_ce_key_server: pgp.mit.edu
+mysql_server_oracle_ce_key_server: keyserver.ubuntu.com
 ```
 
 <!--ENDROLEVARS-->
diff --git a/roles/debian/mysql_server_oracle_ce/defaults/main.yml b/roles/debian/mysql_server_oracle_ce/defaults/main.yml
index 67c066cf6..e2c7fac86 100644
--- a/roles/debian/mysql_server_oracle_ce/defaults/main.yml
+++ b/roles/debian/mysql_server_oracle_ce/defaults/main.yml
@@ -1,4 +1,4 @@
 ---
 mysql_long_query_time: 4
 mysql_server_oracle_ce_key: "8C718D3B5072E1F5" # archive key - see https://dev.mysql.com/doc/refman/8.0/en/gpg-key-archived-packages.html
-mysql_server_oracle_ce_key_server: pgp.mit.edu
\ No newline at end of file
+mysql_server_oracle_ce_key_server: keyserver.ubuntu.com
diff --git a/roles/debian/wazuh/README.md b/roles/debian/wazuh/README.md
index f6efaa7ca..bd4afb89b 100644
--- a/roles/debian/wazuh/README.md
+++ b/roles/debian/wazuh/README.md
@@ -40,7 +40,7 @@ wazuh:
   indexer:
     install: false # install the indexer packages
     single_node: true
-    domain_name: "{{ _domain_name }}"
+    domain_name: indexer.example.com # possible to use "{{ _domain_name }}" in local variables, but not defaults
     indexer_cluster_name: wazuh
     indexer_node_name: node-1 # this server name
     indexer_network_host: 127.0.0.1
@@ -154,7 +154,7 @@ wazuh:
     dashboard_node_name: node-1
     dashboard_server_host: "0.0.0.0"
     dashboard_server_port: "443" # if you want to use provided SSL certificates install a web server and proxy to Wazuh
-    dashboard_server_name: "{{ _domain_name }}"
+    dashboard_server_name: dashboard.example.com # possible to use "{{ _domain_name }}" in local variables, but not defaults
     dashboard_conf_path: "/etc/wazuh-dashboard/"
     wazuh_api_credentials:
       - id: "default"