Access Error for External Website as Pool Member in Single NIC LTM in GCP

hi All,

just deployed a single NIC LTM in GCP (Google Cloud), where there is just an internal vlan.

create node device which is external website (said the website https://www.yahoo.com), where configured SNAT (Auto-map) in the Virtual Server.

when accessing the Virtual Server IP, it returns the error page of Yahoo:

"Yahoo! Will be right back...Thank you for your patience.

Our engineers are working quickly to resolve the issue. "

Any clue? thx.

Sam Fok