diff --git a/docker/nginx/conf.d.templates/server.account.conf.template b/docker/nginx/conf.d.templates/server.account.conf.template
index 64de6523..8507c407 100644
--- a/docker/nginx/conf.d.templates/server.account.conf.template
+++ b/docker/nginx/conf.d.templates/server.account.conf.template
@@ -30,7 +30,12 @@ server {
 server {
 	server_name account.${SERVER_DOMAIN}; # example: account.eu-ger-1.siasky.net
 
-	set_by_lua_block $skynet_portal_domain { return "${SERVER_DOMAIN}" }
+	set_by_lua_block $skynet_portal_domain {
+		-- when accessing portal directly through server domain, portal domain should be set to server domain
+		-- motivation: skynet-js uses Skynet-Portal-Api header (that is set to $skynet_portal_domain) to detect current
+		-- portal address and it should be server domain when accessing specific server by its domain address
+		return "${SERVER_DOMAIN}"
+	}
 	set_by_lua_block $skynet_server_domain { return "${SERVER_DOMAIN}" }
 
 	include /etc/nginx/conf.d/server/server.account;
diff --git a/docker/nginx/conf.d.templates/server.api.conf.template b/docker/nginx/conf.d.templates/server.api.conf.template
index 7d36ff08..5f742127 100644
--- a/docker/nginx/conf.d.templates/server.api.conf.template
+++ b/docker/nginx/conf.d.templates/server.api.conf.template
@@ -30,7 +30,12 @@ server {
 server {
 	server_name ${SERVER_DOMAIN}; # example: eu-ger-1.siasky.net
 
-	set_by_lua_block $skynet_portal_domain { return "${SERVER_DOMAIN}" }
+	set_by_lua_block $skynet_portal_domain {
+		-- when accessing portal directly through server domain, portal domain should be set to server domain
+		-- motivation: skynet-js uses Skynet-Portal-Api header (that is set to $skynet_portal_domain) to detect current
+		-- portal address and it should be server domain when accessing specific server by its domain address
+		return "${SERVER_DOMAIN}"
+	}
 	set_by_lua_block $skynet_server_domain { return "${SERVER_DOMAIN}" }
 
 	include /etc/nginx/conf.d/server/server.api;
diff --git a/docker/nginx/conf.d.templates/server.hns.conf.template b/docker/nginx/conf.d.templates/server.hns.conf.template
index 7067ce4d..f7bb43fb 100644
--- a/docker/nginx/conf.d.templates/server.hns.conf.template
+++ b/docker/nginx/conf.d.templates/server.hns.conf.template
@@ -31,7 +31,12 @@ server {
 server {
 	server_name *.hns.${SERVER_DOMAIN}; # example: *.hns.eu-ger-1.siasky.net
 	
-	set_by_lua_block $skynet_portal_domain { return "${SERVER_DOMAIN}" }
+	set_by_lua_block $skynet_portal_domain {
+		-- when accessing portal directly through server domain, portal domain should be set to server domain
+		-- motivation: skynet-js uses Skynet-Portal-Api header (that is set to $skynet_portal_domain) to detect current
+		-- portal address and it should be server domain when accessing specific server by its domain address
+		return "${SERVER_DOMAIN}"
+	}
 	set_by_lua_block $skynet_server_domain { return "${SERVER_DOMAIN}" }
     
 	proxy_set_header Host ${SERVER_DOMAIN};
diff --git a/docker/nginx/conf.d.templates/server.skylink.conf.template b/docker/nginx/conf.d.templates/server.skylink.conf.template
index 7e22c13c..0d337abb 100644
--- a/docker/nginx/conf.d.templates/server.skylink.conf.template
+++ b/docker/nginx/conf.d.templates/server.skylink.conf.template
@@ -30,7 +30,12 @@ server {
 server {
 	server_name *.${SERVER_DOMAIN}; # example: *.eu-ger-1.siasky.net
 
-	set_by_lua_block $skynet_portal_domain { return "${SERVER_DOMAIN}" }
+	set_by_lua_block $skynet_portal_domain {
+		-- when accessing portal directly through server domain, portal domain should be set to server domain
+		-- motivation: skynet-js uses Skynet-Portal-Api header (that is set to $skynet_portal_domain) to detect current
+		-- portal address and it should be server domain when accessing specific server by its domain address
+		return "${SERVER_DOMAIN}"
+	}
 	set_by_lua_block $skynet_server_domain { return "${SERVER_DOMAIN}" }
 	
 	include /etc/nginx/conf.d/server/server.skylink;