diff --git a/udp2raw---wireguard-example-configurations.md b/udp2raw---wireguard-example-configurations.md
index e713dc3..5d662fc 100644
--- a/udp2raw---wireguard-example-configurations.md
+++ b/udp2raw---wireguard-example-configurations.md
@@ -1,3 +1,18 @@
 [udp2raw+ wireguard example 1](https://github.com/wangyu-/udp2raw/discussions/494)
 
-[udp2raw+ wireguard example 2](https://github.com/wangyu-/udp2raw/issues/466)
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+[udp2raw+ wireguard example 2](https://github.com/wangyu-/udp2raw/issues/466)
+
+### Additional Note
+
+If you wang to redirect 0.0.0.0/0 via VPN, it's very important to add a route exception (on client side) so that the VPN won't hijack udp2raw's traffic. 
+
+(Since your VPN traffic goes throught udp2raw, if your VPN hijacks udp2raw's traffic then there will be a traffic loop and your udp2raw will lost connection.)
+
+
+The route exception could be done by:
+
+```
+ip route add ${YOUR_SERVER_IP} via  ${YOUR_GATEWAY_IP}
+```
+
+If you don't know how to find YOUR_GATEWAY_IP, you can find an example in https://github.com/wangyu-/UDPspeeder/wiki/UDPspeeder-openvpn-config-guide
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