diff --git a/README.MD b/README.MD
index 6a00245..d8c4937 100644
--- a/README.MD
+++ b/README.MD
@@ -1 +1,3 @@
-# 根域名计划
\ No newline at end of file
+# 根域名计划
+
+## 初衷
diff --git a/indoor.zone b/indoor.zone
new file mode 100644
index 0000000..e7841bb
--- /dev/null
+++ b/indoor.zone
@@ -0,0 +1,28 @@
+fwnet.		    	    600	IN	NS	lemon.ns.fwnet.
+fwnet.	    		    600	IN	NS	cranberry.ns.fwnet.
+lemon.ns.fwnet.		    600	IN	A	10.50.249.53
+cranberry.ns.fwnet.	    600	IN	A	10.50.249.65
+5050net.			    600	IN	NS	lemon.ns.fwnet.
+5050net.		    	600	IN	NS	cranberry.ns.fwnet.
+dprk.			        600	IN	NS	lemon.ns.fwnet.
+dprk.			        600	IN	NS	cranberry.ns.fwnet.
+21.10.in-addr.arpa.     600 IN NS   lemon.ns.fwnet.
+21.10.in-addr.arpa.     600 IN NS   cranberry.ns.fwnet.
+50.10.in-addr.arpa.     600 IN NS   lemon.ns.fwnet.
+50.10.in-addr.arpa.     600 IN NS   cranberry.ns.fwnet.
+88.10.in-addr.arpa.     600 IN NS   lemon.ns.fwnet.
+88.10.in-addr.arpa.     600 IN NS   cranberry.ns.fwnet.
+
+
+dn42.                   600 IN NS   ns1.dn42frns.hi.dn42.
+dn42.                   600 IN NS   ns2.dn42frns.hi.dn42.
+ns1.dn42frns.hi.dn42.   600 IN A    172.23.0.53
+ns2.dn42frns.hi.dn42.   600 IN A    172.20.0.53
+20.172.in-addr.arpa.    600 IN NS   ns1.dn42frns.hi.dn42.
+20.172.in-addr.arpa.    600 IN NS   ns2.dn42frns.hi.dn42.
+21.172.in-addr.arpa.    600 IN NS   ns1.dn42frns.hi.dn42.
+21.172.in-addr.arpa.    600 IN NS   ns2.dn42frns.hi.dn42.
+22.172.in-addr.arpa.    600 IN NS   ns1.dn42frns.hi.dn42.
+22.172.in-addr.arpa.    600 IN NS   ns2.dn42frns.hi.dn42.
+23.172.in-addr.arpa.    600 IN NS   ns1.dn42frns.hi.dn42.
+23.172.in-addr.arpa.    600 IN NS   ns2.dn42frns.hi.dn42.