diff --git a/vpn.sh b/vpn.sh
index 402b967..f6066d2 100755
--- a/vpn.sh
+++ b/vpn.sh
@@ -27,6 +27,9 @@ set_up_routes() {
 
     gateway=$(ip route get 10.10.0.21 | grep via | awk '{print $3}')
 
+    ip route replace 10.5.1.0/24 via $gateway # for LNS
+    ip route replace 10.10.0.0/24 via $gateway # for DNS
+
     case "$ip" in
         10.189.*)
             ;;
@@ -34,8 +37,25 @@ set_up_routes() {
             ;;
         *)
             # 内网静态路由
-            ip route delete 10.0.0.0/8 > /dev/null
-            ip route add  10.0.0.0/8 via $gateway
+            # See also: #18 (thanks Hexcles Ma)
+	    ip route replace 10.0.0.0/8 via $gateway
+
+            # Some classroom computers (especially East 6,7)
+	    ip route replace 58.196.192.0/19 via $gateway
+	    ip route replace 58.196.224.0/20 via $gateway
+	    ip route replace 58.200.100.0/24 via $gateway
+
+            # The public CERNET IP of most ZJU servers, which can be reached directly in the Intranet.
+            # Most of them do have a 10.* IP, but sometimes school DNS just returns the public ones.
+	    ip route replace 210.32.0.0/20 via $gateway
+	    ip route replace 210.32.128.0/19 via $gateway
+	    ip route replace 210.32.160.0/21 via $gateway
+	    ip route replace 210.32.168.0/22 via $gateway
+	    ip route replace 210.32.172.0/23 via $gateway
+	    ip route replace 210.32.176.0/20 via $gateway
+
+            # 玉泉和我们 vpn 后的 ip
+	    ip route replace 222.205.0.0/17 via $gateway
             ;;
     esac