diff --git a/core/app.cpp b/core/app.cpp
index dc9798b..7e82d51 100755
--- a/core/app.cpp
+++ b/core/app.cpp
@@ -446,6 +446,7 @@ void App::ReadRequest()
 	CheckRequestMethod();
 	CheckFCGIRole();
 	CheckSSL();
+	SetSubdomain();
 
 	LogAccess();
 
@@ -531,6 +532,12 @@ void App::CheckSSL()
 }
 
 
+void App::SetSubdomain()
+{
+	CreateSubdomain(config.base_url.c_str(), cur.request->env_http_host, cur.request->subdomain);
+}
+
+
 void App::LogAccess()
 {
 	log.PutDate(log1);	
diff --git a/core/app.h b/core/app.h
index 7cbdc02..18079a0 100755
--- a/core/app.h
+++ b/core/app.h
@@ -146,6 +146,7 @@ private:
 	void CheckRequestMethod();
 	void CheckFCGIRole();
 	void CheckSSL();
+	void SetSubdomain();
 
 	void PrepareSessionCookie();
 	void AddDebugInfo(std::wstring & out);
diff --git a/core/misc.h b/core/misc.h
index 7f62fae..21c771d 100755
--- a/core/misc.h
+++ b/core/misc.h
@@ -711,4 +711,49 @@ void RemovePostFileTmp(PostFileTab & post_file_tab);
 
 
 
+/*
+	short_str is removed from long_str (and a last dots are removed too)
+	and the result is stored in out
+
+	sample:
+	short_str: "mydomain.tld"
+	long_str:  "www.subdomain.mydomain.tld"
+	out:       "www.subdomain"
+
+	short_str: "mydomain.tld"
+	long_str:  "otherdifferentstring"
+	out:       ""
+*/
+template<class StringType1, class StringType2, class StringType3>
+void CreateSubdomain(const StringType1 * short_str, const StringType2 * long_str, StringType3 & out)
+{
+size_t i1, i2;
+
+	out.clear();
+
+	for(i1=0 ; short_str[i1] != 0 ; ++i1);
+	for(i2=0 ; long_str[i2]  != 0 ; ++i2);
+
+	if( i1 >= i2 )
+		return;
+
+	// i1 is < i2
+
+	while( i1-- > 0 )
+	{
+		i2 -= 1;
+
+		if( short_str[i1] != long_str[i2] )
+			return; // short_str is not a last substring of long_str
+	}
+
+	while( i2>0 && long_str[i2-1] == '.' )
+		i2 -= 1;
+
+	for(i1=0 ; i1 < i2 ; ++i1)
+		out += long_str[i1];
+}
+
+
+
 #endif
diff --git a/core/request.cpp b/core/request.cpp
index 802c625..8be1a13 100755
--- a/core/request.cpp
+++ b/core/request.cpp
@@ -86,6 +86,8 @@ void Request::Clear()
 
 	start_time = 0;
 	memset(&start_tm, 0, sizeof(start_tm));
+
+	subdomain.clear();
 }
 
 
diff --git a/core/request.h b/core/request.h
index 410e23d..fdc5355 100755
--- a/core/request.h
+++ b/core/request.h
@@ -133,6 +133,10 @@ struct Request
 	time_t start_time;
 	tm     start_tm;
 
+	// a subdomain
+	// subdomain = HTTP_HOST environment variable - config->base_url
+	std::wstring subdomain;
+
 
 
 	Request();
diff --git a/core/system.cpp b/core/system.cpp
index 54a0535..ad46440 100755
--- a/core/system.cpp
+++ b/core/system.cpp
@@ -126,6 +126,13 @@ bool ssl = false;
 void System::RedirectTo(const Item & item, const wchar_t * postfix)
 {
 	PutUrlProto(config->use_ssl, cur->request->redirect_to);
+
+	if( !cur->request->subdomain.empty() )
+	{
+		cur->request->redirect_to += cur->request->subdomain;
+		cur->request->redirect_to += '.';
+	}
+
 	cur->request->redirect_to += config->base_url;
 
 	if( item.type == Item::dir )
@@ -152,6 +159,13 @@ void System::RedirectTo(const Item & item, const wchar_t * postfix)
 void System::RedirectTo(long item_id, const wchar_t * postfix)
 {
 	PutUrlProto(config->use_ssl, cur->request->redirect_to);
+
+	if( !cur->request->subdomain.empty() )
+	{
+		cur->request->redirect_to += cur->request->subdomain;
+		cur->request->redirect_to += '.';
+	}
+
 	cur->request->redirect_to += config->base_url;
 	Item * pdir = dirs.GetDir(item_id);
 
@@ -193,6 +207,13 @@ void System::RedirectTo(long item_id, const wchar_t * postfix)
 void System::RedirectTo(const wchar_t * url)
 {
 	PutUrlProto(config->use_ssl, cur->request->redirect_to);
+
+	if( !cur->request->subdomain.empty() )
+	{
+		cur->request->redirect_to += cur->request->subdomain;
+		cur->request->redirect_to += '.';
+	}
+
 	cur->request->redirect_to += config->base_url;
 
 	if( url[0] == '/' )
diff --git a/notify/notify.cpp b/notify/notify.cpp
index 07b8a79..cc481e6 100755
--- a/notify/notify.cpp
+++ b/notify/notify.cpp
@@ -153,7 +153,7 @@ void Notify::CreateItemLink(const Item & item, std::wstring & item_link, std::ws
 	{
 		dirs->MakePath(item.id, tmp_path);
 		item_link  = config->url_proto;
-		item_link += config->base_url;
+		item_link += config->base_url;	// !! IMPROVE ME what about subdomains?
 		item_link += tmp_path;
 		dir_link   = item_link;
 	}
@@ -161,7 +161,7 @@ void Notify::CreateItemLink(const Item & item, std::wstring & item_link, std::ws
 	{
 		dirs->MakePath(item.parent_id, tmp_path);
 		item_link  = config->url_proto;
-		item_link += config->base_url;
+		item_link += config->base_url; // !! IMPROVE ME what about subdomains?
 		item_link += tmp_path;
 		dir_link   = item_link;
 		item_link += item.url;
@@ -175,7 +175,7 @@ void Notify::CreateActivateLink(const std::wstring & name, long code, std::wstri
 wchar_t buff[50];
 
 	link  = config->url_proto;
-	link += config->base_url;
+	link += config->base_url;// !! IMPROVE ME what about subdomains?
 	link += L"/pw/activate/login:";
 	UrlEncode(name, link, false);
 	link += L"/code:";
@@ -188,7 +188,7 @@ void Notify::CreateResetPasswordLink(const std::wstring & name, long code, std::
 wchar_t buff[50];
 
 	link  = config->url_proto;
-	link += config->base_url;
+	link += config->base_url;// !! IMPROVE ME what about subdomains?
 	link += L"/pw/resetpassword/login:";
 	UrlEncode(name, link, false);
 	link += L"/code:";
diff --git a/plugins/export/exportinfo.cpp b/plugins/export/exportinfo.cpp
index 283e2f9..442328c 100755
--- a/plugins/export/exportinfo.cpp
+++ b/plugins/export/exportinfo.cpp
@@ -170,7 +170,7 @@ void ExportInfo::SendFile(const Item & item, bool thumb)
 	{
 		msg.type = WINIX_PL_EXPORT_TYPE_CREATE_FILE;
 		msg.url  = config->url_proto;
-		msg.url += config->base_url;
+		msg.url += config->base_url;// !! IMPROVE ME what about subdomains?
 		system->dirs.MakePath(item.parent_id, msg.url, false);
 		msg.url += item.url;
 		msg.path += L".php"; // !! do konfiga
@@ -224,7 +224,7 @@ void ExportInfo::SendDir(const Item & item)
 
 	msg.type = WINIX_PL_EXPORT_TYPE_CREATE_FILE;
 	msg.url  = config->url_proto;
-	msg.url += config->base_url;
+	msg.url += config->base_url;// !! IMPROVE ME what about subdomains?
 	system->dirs.MakePath(item.id, msg.url, false);
 	msg.path += L"index.html"; // !! do konfiga
 
diff --git a/plugins/gallery/templates.cpp b/plugins/gallery/templates.cpp
index 293c256..ddbb200 100755
--- a/plugins/gallery/templates.cpp
+++ b/plugins/gallery/templates.cpp
@@ -78,7 +78,7 @@ void gallery_tab_subject(Info & i)
 void gallery_tab_link(Info & i)
 {
 	doc_proto(i);
-	i.out << config->base_url;
+	i.out << config->base_url;// !! IMPROVE ME what about subdomains?
 	gallery_tab_dir(i);
 	gallery_tab_url(i);
 }
diff --git a/plugins/thread/createthread.cpp b/plugins/thread/createthread.cpp
index bc99c01..8600aae 100755
--- a/plugins/thread/createthread.cpp
+++ b/plugins/thread/createthread.cpp
@@ -56,7 +56,7 @@ void CreateThread::SendNotify(const Item & item)
 	notify_msg.code           = WINIX_NOTIFY_CODE_ADD;
 	notify_msg.template_index = thread_info->template_index;
 	notify_msg.dir_link       = config->url_proto;
-	notify_msg.dir_link      += config->base_url;
+	notify_msg.dir_link      += config->base_url;// !! IMPROVE ME what about subdomains?
 	system->dirs.MakePath(item.parent_id, notify_msg.dir_link, false);
 	notify_msg.item_link      = notify_msg.dir_link;
 	notify_msg.item_link     += item.url;
diff --git a/plugins/thread/reply.cpp b/plugins/thread/reply.cpp
index 9d01b01..98a15b4 100755
--- a/plugins/thread/reply.cpp
+++ b/plugins/thread/reply.cpp
@@ -62,7 +62,7 @@ void Reply::SendNotify(const Item & item)
 	notify_msg.code           = WINIX_NOTIFY_CODE_REPLY;
 	notify_msg.template_index = thread_info->template_index;
 	notify_msg.dir_link       = config->url_proto;
-	notify_msg.dir_link      += config->base_url;
+	notify_msg.dir_link      += config->base_url;// !! IMPROVE ME what about subdomains?
 	system->dirs.MakePath(item.parent_id, notify_msg.dir_link, false);
 	notify_msg.item_link      = notify_msg.dir_link;
 	notify_msg.item_link     += item.url;
diff --git a/plugins/ticket/createticket.cpp b/plugins/ticket/createticket.cpp
index f3c4627..0d574fc 100755
--- a/plugins/ticket/createticket.cpp
+++ b/plugins/ticket/createticket.cpp
@@ -62,7 +62,7 @@ void CreateTicket::AddTicket(Ticket & ticket, Item & item)
 		notify_msg.code           = WINIX_NOTIFY_CODE_ADD;
 		notify_msg.template_index = ticket_info->template_index;
 		notify_msg.dir_link       = config->url_proto;
-		notify_msg.dir_link      += config->base_url;
+		notify_msg.dir_link      += config->base_url;// !! IMPROVE ME what about subdomains?
 		system->dirs.MakePath(item.parent_id, notify_msg.dir_link, false);
 		notify_msg.item_link      = notify_msg.dir_link;
 		notify_msg.item_link     += item.url;
diff --git a/plugins/ticket/editticket.cpp b/plugins/ticket/editticket.cpp
index 2d7ce42..cc6220b 100755
--- a/plugins/ticket/editticket.cpp
+++ b/plugins/ticket/editticket.cpp
@@ -67,7 +67,7 @@ void EditTicket::ChangeTicket(Ticket & ticket, Item & item)
 		notify_msg.code           = WINIX_NOTIFY_CODE_EDIT;
 		notify_msg.template_index = ticket_info->template_index;
 		notify_msg.dir_link       = config->url_proto;
-		notify_msg.dir_link      += config->base_url;
+		notify_msg.dir_link      += config->base_url;// !! IMPROVE ME what about subdomains?
 		system->dirs.MakePath(item.parent_id, notify_msg.dir_link, false);
 		notify_msg.item_link      = notify_msg.dir_link;
 		notify_msg.item_link     += item.url;
diff --git a/templates/dir.cpp b/templates/dir.cpp
index 2ddebc1..ff859d5 100755
--- a/templates/dir.cpp
+++ b/templates/dir.cpp
@@ -275,6 +275,10 @@ void dir_tab_url(Info & i)
 void dir_tab_link(Info & i)
 {
 	doc_proto(i);
+
+	if( !cur->request->subdomain.empty() )
+		i.out << cur->request->subdomain << '.';
+
 	i.out << config->base_url;
 	
 	for(size_t a = 0 ; a <= dir_index && a < cur->request->dir_tab.size() ; ++a)
diff --git a/templates/doc.cpp b/templates/doc.cpp
index 3983644..0834f52 100755
--- a/templates/doc.cpp
+++ b/templates/doc.cpp
@@ -75,6 +75,10 @@ void doc_proto_common(Info & i)
 void doc_base_url(Info & i)
 {
 	doc_proto(i);
+
+	if( !cur->request->subdomain.empty() )
+		i.out << cur->request->subdomain << '.';
+
 	i.out << config->base_url;
 }
 
diff --git a/templates/item.cpp b/templates/item.cpp
index 44a22c3..15c8748 100755
--- a/templates/item.cpp
+++ b/templates/item.cpp
@@ -165,6 +165,10 @@ void item_url_is(Info & i)
 void item_link(Info & i)
 {
 	doc_proto(i);
+
+	if( !cur->request->subdomain.empty() )
+		i.out << cur->request->subdomain << '.';
+
 	i.out << config->base_url;
 	item_dir(i);
 	item_url(i);
@@ -500,6 +504,10 @@ void item_tab_link(Info & i)
 	if( item_index < cur->request->item_tab.size() )
 	{
 		doc_proto(i);
+		
+		if( !cur->request->subdomain.empty() )
+			i.out << cur->request->subdomain << '.';
+
 		i.out << config->base_url;
 		item_tab_dir(i);
 		item_tab_url(i);
diff --git a/templates/login.cpp b/templates/login.cpp
index d68dd29..cea0417 100755
--- a/templates/login.cpp
+++ b/templates/login.cpp
@@ -22,6 +22,9 @@ void login_path(Info & i)
 	else
 		i.out << config->url_proto;
 
+	if( !cur->request->subdomain.empty() )
+		i.out << cur->request->subdomain << '.';
+
 	i.out << config->base_url;
 
 	if( system->HasReadExecAccessToPath(cur->request->dir_tab) )