diff --git a/config.corka b/config.corka
index b0ad3a2..279eb79 100644
--- a/config.corka
+++ b/config.corka
@@ -1,6 +1,6 @@
 #
 # Automatically generated file; DO NOT EDIT.
-# Linux/x86 3.17.7-backbone-r1 Kernel Configuration
+# Linux/x86 3.17.7-backbone-r2 Kernel Configuration
 #
 CONFIG_64BIT=y
 CONFIG_X86_64=y
@@ -1251,7 +1251,7 @@ CONFIG_NET_CORE=y
 # CONFIG_NETCONSOLE is not set
 # CONFIG_NETPOLL is not set
 # CONFIG_NET_POLL_CONTROLLER is not set
-# CONFIG_TUN is not set
+CONFIG_TUN=m
 # CONFIG_VETH is not set
 # CONFIG_NLMON is not set
 # CONFIG_ARCNET is not set
diff --git a/config.nickolay-842 b/config.nickolay-842
index c26490e..3e0b15c 100644
--- a/config.nickolay-842
+++ b/config.nickolay-842
@@ -1,6 +1,6 @@
 #
 # Automatically generated file; DO NOT EDIT.
-# Linux/x86 3.17.7-backbone-r1 Kernel Configuration
+# Linux/x86 3.17.7-backbone-r2 Kernel Configuration
 #
 CONFIG_64BIT=y
 CONFIG_X86_64=y
@@ -1223,7 +1223,7 @@ CONFIG_NET_CORE=y
 # CONFIG_NETCONSOLE is not set
 # CONFIG_NETPOLL is not set
 # CONFIG_NET_POLL_CONTROLLER is not set
-# CONFIG_TUN is not set
+CONFIG_TUN=m
 # CONFIG_VETH is not set
 # CONFIG_NLMON is not set
 # CONFIG_ARCNET is not set
diff --git a/config.np350v b/config.np350v
index a3b2ad1..09518af 100644
--- a/config.np350v
+++ b/config.np350v
@@ -1,6 +1,6 @@
 #
 # Automatically generated file; DO NOT EDIT.
-# Linux/x86 3.17.7-backbone-r1 Kernel Configuration
+# Linux/x86 3.17.7-backbone-r2 Kernel Configuration
 #
 CONFIG_64BIT=y
 CONFIG_X86_64=y
@@ -1262,7 +1262,7 @@ CONFIG_NET_CORE=y
 # CONFIG_NETCONSOLE is not set
 # CONFIG_NETPOLL is not set
 # CONFIG_NET_POLL_CONTROLLER is not set
-# CONFIG_TUN is not set
+CONFIG_TUN=m
 # CONFIG_VETH is not set
 # CONFIG_NLMON is not set
 # CONFIG_ARCNET is not set