diff --git a/build/common/nginx-default.conf.template b/build/common/nginx-default.conf.template
index 82398514..c3d90614 100644
--- a/build/common/nginx-default.conf.template
+++ b/build/common/nginx-default.conf.template
@@ -43,9 +43,9 @@ server {
         proxy_set_header X-Forwarded-Proto $proxy_x_forwarded_proto;
         proxy_set_header Upgrade $http_upgrade;
         proxy_set_header Connection "upgrade";
-        proxy_set_header X-Frappe-Site-Name $host;
         proxy_set_header Origin $proxy_x_forwarded_proto://$http_host;
-        proxy_set_header Host $http_host;
+        proxy_set_header X-Frappe-Site-Name ${FRAPPE_SITE_NAME_HEADER};
+        proxy_set_header Host ${HTTP_HOST};
 
         proxy_pass http://socketio-server;
     }
@@ -66,8 +66,8 @@ server {
     location @webserver {
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
         proxy_set_header X-Forwarded-Proto $proxy_x_forwarded_proto;
-        proxy_set_header X-Frappe-Site-Name $host;
-        proxy_set_header Host $http_host;
+        proxy_set_header X-Frappe-Site-Name ${FRAPPE_SITE_NAME_HEADER};
+        proxy_set_header Host ${HTTP_HOST};
         proxy_set_header X-Use-X-Accel-Redirect True;
         proxy_read_timeout ${HTTP_TIMEOUT};
         proxy_redirect off;
diff --git a/build/frappe-nginx/docker-entrypoint.sh b/build/frappe-nginx/docker-entrypoint.sh
index ff1eef8e..eb0e337f 100755
--- a/build/frappe-nginx/docker-entrypoint.sh
+++ b/build/frappe-nginx/docker-entrypoint.sh
@@ -45,6 +45,15 @@ if [[ -z "$UPSTREAM_REAL_IP_HEADER" ]]; then
     export UPSTREAM_REAL_IP_HEADER="X-Forwarded-For"
 fi
 
+if [[ -z "$FRAPPE_SITE_NAME_HEADER" ]]; then
+    export FRAPPE_SITE_NAME_HEADER="\$host"
+fi
+
+if [[ -z "$HTTP_HOST" ]]; then
+    export HTTP_HOST="\$http_host"
+fi
+
+
 envsubst '${FRAPPE_PY}
     ${FRAPPE_PY_PORT}
     ${FRAPPE_SOCKETIO}
@@ -52,6 +61,8 @@ envsubst '${FRAPPE_PY}
     ${HTTP_TIMEOUT}
     ${UPSTREAM_REAL_IP_ADDRESS}
     ${UPSTREAM_REAL_IP_RECURSIVE}
+    ${FRAPPE_SITE_NAME_HEADER}
+    ${HTTP_HOST}
     ${UPSTREAM_REAL_IP_HEADER}' \
     < /etc/nginx/conf.d/default.conf.template > /etc/nginx/conf.d/default.conf
 
diff --git a/docs/environment-variables.md b/docs/environment-variables.md
index 09d5654b..01f24a5e 100644
--- a/docs/environment-variables.md
+++ b/docs/environment-variables.md
@@ -24,6 +24,8 @@ These variables are set on every container start. Change in these variables will
 - `UPSTREAM_REAL_IP_ADDRESS `: The trusted address (or ip range) of upstream proxy servers. If set, this will tell nginx to trust the X-Forwarded-For header from these proxy servers in determining the real IP address of connecting clients. Default: 127.0.0.1
 - `UPSTREAM_REAL_IP_RECURSIVE`: When set to `on`, this will tell nginx to not just look to the last upstream proxy server in determining the real IP address. Default: off
 - `UPSTREAM_REAL_IP_HEADER`: Set this to the header name sent by your upstream proxy server to indicate the real IP of connecting clients. Default: X-Forwarded-For
+- `FRAPPE_SITE_NAME_HEADER`: NGINX `X-Frappe-Site-Name` header in the HTTP request which matches a site name. Default: `$host`
+- `HTTP_HOST`: NGINX `Host` header in the HTTP request which matches a site name. Default: `$http_host`
 
 ### frappe-socketio