diff --git a/roles/service-nginx-firmware/templates/firmware_vhost.conf.j2 b/roles/service-nginx-firmware/templates/firmware_vhost.conf.j2
index 1511aab..cc9a29e 100644
--- a/roles/service-nginx-firmware/templates/firmware_vhost.conf.j2
+++ b/roles/service-nginx-firmware/templates/firmware_vhost.conf.j2
@@ -41,7 +41,11 @@ server {
 server {
     listen 80;
     listen [::]:80;
+{% if mesh.http_domain_external is defined %}
     server_name firmware.{{ mesh.http_domain_external }} firmware.{{ mesh.http_domain_internal }};
+{% else %}
+    server_name firmware.{{ mesh.http_domain_internal }};
+{% endif %}
 
     charset utf-8;
     server_tokens off;
@@ -58,7 +62,11 @@ server {
 server {
     listen 443 ssl;
     listen [::]:443 ssl;
+{% if mesh.http_domain_external is defined %}
     server_name firmware.{{ mesh.http_domain_external }} firmware.{{ mesh.http_domain_internal }};
+{% else %}
+    server_name firmware.{{ mesh.http_domain_internal }};
+{% endif %}
 
     add_header 'Access-Control-Allow-Origin' '*';
 
diff --git a/roles/service-nginx-meshviewer/templates/meshviewer_vhost.conf.j2 b/roles/service-nginx-meshviewer/templates/meshviewer_vhost.conf.j2
index d21a387..0f144e3 100644
--- a/roles/service-nginx-meshviewer/templates/meshviewer_vhost.conf.j2
+++ b/roles/service-nginx-meshviewer/templates/meshviewer_vhost.conf.j2
@@ -58,7 +58,11 @@ server {
 server {
     listen 80;
     listen [::]:80;
+{% if mesh.http_domain_external is defined %}
     server_name {{ http_meshviewer_prefix }}.{{ mesh.http_domain_external }} {{ http_meshviewer_prefix }}.{{ mesh.http_domain_internal }};
+{% else %}
+    server_name {{ http_meshviewer_prefix }}.{{ mesh.http_domain_internal }};
+{% endif %}
     return 301 https://{{ http_meshviewer_external }}$request_uri;
 
     include /etc/nginx/snippets/letsencrypt-acme-challenge.conf;
@@ -67,7 +71,11 @@ server {
 server {
     listen 443 ssl;
     listen [::]:443 ssl;
-    server_name {{ http_meshviewer_prefix }}.{{ mesh.http_domain_internal }} {{ http_meshviewer_prefix }}.{{ mesh.http_domain_external }};
+{% if mesh.http_domain_external is defined %}
+    server_name {{ http_meshviewer_prefix }}.{{ mesh.http_domain_external }} {{ http_meshviewer_prefix }}.{{ mesh.http_domain_internal }};
+{% else %}
+    server_name {{ http_meshviewer_prefix }}.{{ mesh.http_domain_internal }};
+{% endif %}
     return 301 https://{{ http_meshviewer_external }}$request_uri;
 
     include /etc/nginx/snippets/letsencrypt-acme-challenge.conf;