diff --git a/config.ini b/config.ini
index 598120417..06708ed2d 100644
--- a/config.ini
+++ b/config.ini
@@ -192,7 +192,7 @@ net.inet.tcp.recvbuf_max=16777216
 net.inet.tcp.sendbuf_auto=1
 net.inet.tcp.recvbuf_auto=1
 net.inet.tcp.sendbuf_inc=16384
-net.inet.tcp.recvbuf_inc=524288
+#net.inet.tcp.recvbuf_inc=524288
 net.inet.tcp.sack.enable=1
 net.inet.tcp.blackhole=1
 net.inet.tcp.msl=2000
@@ -201,3 +201,6 @@ net.inet.tcp.delayed_ack=0
 net.inet.udp.blackhole=1
 net.inet.ip.redirect=0
 net.inet.ip.forwarding=0
+
+#set default stacks:freebsd, rack or bbr
+net.inet.tcp.functions_default=bbr