FortiGate IPsec VPN tunnel up nhưng không ping được LAN remote: kiểm tra từ đâu?
VPN tunnel đã up, Phase 1 / Phase 2 nhìn có vẻ ổn nhưng LAN bên này vẫn không ping được LAN bên kia? Bài viết này hướng dẫn cách kiểm tra từ Phase 2 Selector, route, firewall policy, NAT, route ngược đến debug flow.
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