NAT can not port 500 and 4500

I am configure VPN on ASA 5520, but I can not NAT port 4500 and 500,

ask the pro help!!!

infomation : IP Wan

topology : ISP (> Peplink 380 -> ASA 5520

IP lan network :

Thanks Best & Regards

We have not reported any issue on port forwarding for UDP port 500 and 4500 for IPsec. Please check is there any firewall rules on Peplink unit that denied those traffic.

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