diff --git a/AddressBook.cpp b/AddressBook.cpp
index 1c2f3e24..6570e172 100644
--- a/AddressBook.cpp
+++ b/AddressBook.cpp
@@ -229,11 +229,7 @@ namespace client
 			delete m_Storage;
 			m_Storage = nullptr;
 		}
-		if (m_DefaultSubscription)
-		{	
-			delete m_DefaultSubscription;
-			m_DefaultSubscription = nullptr;
-		}	
+		m_DefaultSubscription = nullptr;	
 		for (auto it: m_Subscriptions)
 			delete it;
 		m_Subscriptions.clear ();	
@@ -327,19 +323,6 @@ namespace client
 			LoadHostsFromStream (f);
 			m_IsLoaded = true;
 		}
-		else
-		{
-			// if not found download it from http://i2p-projekt.i2p/hosts.txt 
-			LogPrint (eLogInfo, "Addressbook: hosts.txt not found, trying to download it from default subscription.");
-			if (!m_IsDownloading)
-			{
-				m_IsDownloading = true;
-				if (!m_DefaultSubscription)
-					m_DefaultSubscription = new AddressBookSubscription (*this, DEFAULT_SUBSCRIPTION_ADDRESS);
-				m_DefaultSubscription->CheckSubscription ();
-			}
-		}	
-		
 	}
 
 	void AddressBook::LoadHostsFromStream (std::istream& f)
@@ -406,6 +389,11 @@ namespace client
 	void AddressBook::DownloadComplete (bool success)
 	{
 		m_IsDownloading = false;
+		if (success && m_DefaultSubscription)
+		{	
+			m_DefaultSubscription.reset (nullptr);
+			m_IsLoaded = true;
+		}	
 		if (m_SubscriptionsUpdateTimer)
 		{
 			m_SubscriptionsUpdateTimer->expires_from_now (boost::posix_time::minutes(
@@ -418,8 +406,8 @@ namespace client
 	void AddressBook::StartSubscriptions ()
 	{
 		LoadSubscriptions ();
-		if (!m_Subscriptions.size ()) return;	
-
+		if (m_IsLoaded && m_Subscriptions.empty ()) return;
+		
 		auto dest = i2p::client::context.GetSharedLocalDestination ();
 		if (dest)
 		{
@@ -444,12 +432,24 @@ namespace client
 		{
 			auto dest = i2p::client::context.GetSharedLocalDestination ();
 			if (!dest) return;
-			if (m_IsLoaded && !m_IsDownloading && dest->IsReady () && !m_Subscriptions.empty ())
+			if (!m_IsDownloading && dest->IsReady ())
 			{
-				// pick random subscription
-				auto ind = rand () % m_Subscriptions.size();	
-				m_IsDownloading = true;	
-				m_Subscriptions[ind]->CheckSubscription ();		
+				if (!m_IsLoaded)
+				{
+					// download it from http://i2p-projekt.i2p/hosts.txt 
+					LogPrint (eLogInfo, "Addressbook: trying to download it from default subscription.");
+					if (!m_DefaultSubscription)
+						m_DefaultSubscription.reset (new AddressBookSubscription (*this, DEFAULT_SUBSCRIPTION_ADDRESS));
+					m_IsDownloading = true;	
+					m_DefaultSubscription->CheckSubscription ();
+				}	
+				else if (!m_Subscriptions.empty ())
+				{	
+					// pick random subscription
+					auto ind = rand () % m_Subscriptions.size();	
+					m_IsDownloading = true;	
+					m_Subscriptions[ind]->CheckSubscription ();
+				}	
 			}
 			else
 			{
diff --git a/AddressBook.h b/AddressBook.h
index b50b9d9b..f5f5270e 100644
--- a/AddressBook.h
+++ b/AddressBook.h
@@ -78,7 +78,7 @@ namespace client
 			AddressBookStorage * m_Storage;
 			volatile bool m_IsLoaded, m_IsDownloading;
 			std::vector<AddressBookSubscription *> m_Subscriptions;
-			AddressBookSubscription * m_DefaultSubscription; // in case if we don't know any addresses yet
+			std::unique_ptr<AddressBookSubscription> m_DefaultSubscription; // in case if we don't know any addresses yet
 			boost::asio::deadline_timer * m_SubscriptionsUpdateTimer;
 	};
 
diff --git a/NetDb.cpp b/NetDb.cpp
index 6376f44e..9f0e4312 100644
--- a/NetDb.cpp
+++ b/NetDb.cpp
@@ -375,6 +375,14 @@ namespace data
 							total--;
 						}	
 					}
+					else if (total > 2500)
+					{
+						if (ts > it.second->GetTimestamp () + 12*3600*1000LL) // 12 hours
+						{	
+							it.second->SetUnreachable (true);
+							total--;
+						}	
+					}	
 					else if (total > 300)
 					{
 						if (ts > it.second->GetTimestamp () + 30*3600*1000LL) // 30 hours
diff --git a/docs/build_notes_unix.md b/docs/build_notes_unix.md
index 882a8ece..292849a7 100644
--- a/docs/build_notes_unix.md
+++ b/docs/build_notes_unix.md
@@ -23,6 +23,13 @@ After successfull build i2pd could be installed with:
 ```bash
 make install
 ```
+or you can just use 'make' once you have all dependacies (boost and openssl) installed 
+
+```bash
+git clone https://github.com/PurpleI2P/i2pd.git
+cd i2pd
+make
+```
 
 Debian/Ubuntu
 -------------