diff --git a/docker/.env b/docker/.env
index 380e561..ae371de 100644
--- a/docker/.env
+++ b/docker/.env
@@ -12,7 +12,11 @@
 # Image: ckan
 CKAN_SITE_ID=default
 
+# Hostname, IP address and port of the catalog
 EPOS_MSL_HOST=epos-msl.ckan
+EPOS_MSL_HOST_IP=127.0.0.1
+EPOS_MSL_HOST_PORT=18443
+
 #
 # On AWS, your CKAN_SITE_URL is the output of:
 # curl -s http://169.254.169.254/latest/meta-data/public-hostname
diff --git a/docker/docker-compose-separate-msl-api.yml b/docker/docker-compose-separate-msl-api.yml
index 8b3c9aa..21aa008 100644
--- a/docker/docker-compose-separate-msl-api.yml
+++ b/docker/docker-compose-separate-msl-api.yml
@@ -50,8 +50,9 @@ services:
     image: ghcr.io/utrechtuniversity/epos-msl-cat-nginx:latest
     environment:
       - EPOS_MSL_HOST=${EPOS_MSL_HOST}
+      - EPOS_MSL_HOST_PORT=${EPOS_MSL_HOST_PORT}
     ports:
-      - "18443:443"
+      - "${EPOS_MSL_HOST_IP}:${EPOS_MSL_HOST_PORT}:443"
     volumes:
       - nginx_config:/etc/nginx/conf.d
       - nginx_certificates:/etc/certificates
@@ -80,6 +81,8 @@ services:
       -  MYSQL_ROOT_PASSWORD=${MYSQL_ROOT_PASSWORD}
       -  MSLAPI_ROLE=WEBSERVER
       -  FAST_API_TOKEN=${FAST_API_TOKEN}
+      -  EPOS_MSL_HOST=${EPOS_MSL_HOST}
+      -  EPOS_MSL_HOST_PORT=${EPOS_MSL_HOST_PORT}
     ports:
       - "80"
     volumes:
@@ -94,6 +97,8 @@ services:
       -  MYSQL_ROOT_PASSWORD=${MYSQL_ROOT_PASSWORD}
       -  MSLAPI_ROLE=QUEUE_WORKER
       -  FAST_API_TOKEN=${FAST_API_TOKEN}
+      -  EPOS_MSL_HOST=${EPOS_MSL_HOST}
+      -  EPOS_MSL_HOST_PORT=${EPOS_MSL_HOST_PORT}
     volumes:
       -  ckan_api_key:/ckan_api_key
       -  mslapi_signal:/signal
diff --git a/docker/docker-compose.yml b/docker/docker-compose.yml
index 933f6c4..4a63508 100644
--- a/docker/docker-compose.yml
+++ b/docker/docker-compose.yml
@@ -50,8 +50,9 @@ services:
     image: ghcr.io/utrechtuniversity/epos-msl-cat-nginx:latest
     environment:
       - EPOS_MSL_HOST=${EPOS_MSL_HOST}
+      - EPOS_MSL_HOST_PORT=${EPOS_MSL_HOST_PORT}
     ports:
-      - "18443:443"
+      - "${EPOS_MSL_HOST_IP}:${EPOS_MSL_HOST_PORT}:443"
     volumes:
       - nginx_config:/etc/nginx/conf.d
       - nginx_certificates:/etc/certificates
@@ -83,6 +84,8 @@ services:
     environment:
       -  FAST_API_TOKEN=${FAST_API_TOKEN}
       -  MYSQL_ROOT_PASSWORD=${MYSQL_ROOT_PASSWORD}
+      -  EPOS_MSL_HOST=${EPOS_MSL_HOST}
+      -  EPOS_MSL_HOST_PORT=${EPOS_MSL_HOST_PORT}
       -  MSLAPI_ROLE=BOTH
     volumes:
       -  ckan_api_key:/ckan_api_key
diff --git a/docker/images/msl-api/msl-api-entrypoint.sh b/docker/images/msl-api/msl-api-entrypoint.sh
index aed020d..5adc324 100644
--- a/docker/images/msl-api/msl-api-entrypoint.sh
+++ b/docker/images/msl-api/msl-api-entrypoint.sh
@@ -54,6 +54,14 @@ FLUSH PRIVILEGES;
 	 # Also configure the FAST-API key, which is passed via an environment variable
 	 perl -pi.bak -e '$fast_api_token=$ENV{FAST_API_TOKEN}; s/PUT_FASTAPI_TOKEN_HERE/"$fast_api_token"/ge' "/var/www/msl_api/.env"
 
+	 # Configure App and and asset URL
+	 if [ "$EPOS_MSL_HOST_PORT" -eq "443" ]
+         then export APP_ASSET_URL="https://${EPOS_MSL_HOST}"
+	 else export APP_ASSET_URL="https://${EPOS_MSL_HOST}:${EPOS_MSL_HOST_PORT}"
+	 fi
+         perl -pi.bak -e '$app_url=$ENV{APP_ASSET_URL}; s/PUT_APP_URL_HERE/"$app_url"/ge' "/var/www/msl_api/.env"
+         perl -pi.bak -e '$asset_url=$ENV{APP_ASSET_URL}; s/PUT_ASSET_URL_HERE/"$asset_url"/ge' "/var/www/msl_api/.env"
+
          cd /var/www/msl_api
 	 # Initialize the MSL-API application
 	 set -x
diff --git a/docker/images/msl-api/msl-api.env b/docker/images/msl-api/msl-api.env
index 8b09175..e53bd19 100644
--- a/docker/images/msl-api/msl-api.env
+++ b/docker/images/msl-api/msl-api.env
@@ -2,8 +2,8 @@ APP_KEY=
 APP_NAME=MSL
 APP_ENV=production
 APP_DEBUG=false
-APP_URL=https://epos-msl.ckan:18443
-ASSET_URL=https://epos-msl.ckan:18443
+APP_URL=PUT_APP_URL_HERE
+ASSET_URL=PUT_ASSET_URL_HERE
 
 LOG_CHANNEL=stack
 LOG_LEVEL=debug
diff --git a/docker/images/nginx/ckan.site b/docker/images/nginx/ckan.site
index 6959627..240733e 100644
--- a/docker/images/nginx/ckan.site
+++ b/docker/images/nginx/ckan.site
@@ -43,7 +43,7 @@ server {
 
     location / {
         proxy_pass http://mslapi_webserver:80/;
-        proxy_set_header Host $host:18443;
+        proxy_set_header Host PUT_HOST_HEADER_HERE;
         proxy_set_header X-Forwarded-Proto https;
         proxy_cache cache;
         proxy_cache_bypass $cookie_auth_tkt;
diff --git a/docker/images/nginx/nginx-entrypoint.sh b/docker/images/nginx/nginx-entrypoint.sh
index 6799cdd..7c3f29a 100644
--- a/docker/images/nginx/nginx-entrypoint.sh
+++ b/docker/images/nginx/nginx-entrypoint.sh
@@ -20,5 +20,12 @@ else echo "Generating DHParam configuration..."
      echo "DHParam generation complete."
 fi
 
+# Configure host header for reverse proxy
+if [ "$EPOS_MSL_HOST_PORT" -eq "443" ]
+then export HOST_HEADER="${EPOS_MSL_HOST}"
+else export HOST_HEADER="${EPOS_MSL_HOST}:${EPOS_MSL_HOST_PORT}"
+fi
+perl -pi.bak -e '$host_header=$ENV{HOST_HEADER}; s/PUT_HOST_HEADER_HERE/"$host_header"/ge' "/etc/nginx/conf.d/ckan.conf"
+
 ## Run Nginx
 nginx -g "daemon off;"