Kermit67

First, The wan port of the Sonicwall works fine with another Internet router provider in DHCP mode. Using this mode with the Starlink kit (DHCP mode for Sonicwall WAN interface) i don't obtain any IP adress (even in 100.79.X.X like a pc client...) but link is up on this interface. I don't find wath type of IP range (public or private ?) 100.79.0.0 range is. Maybe the Sonicwall don't wants that range of IP adress.

The first time we had connected Starlink routeur in "passthrought mode" behind our Sonicwall firewall, access to Internet works fine. The Sonicwall ip interface was 192.168.100.100 with 192.168.100.1 (Starlink router) as gateway and the Sonicwall made the NAT for all clients coming from Lan interface. But after a power problem we replace the Starlink kit. And now with the same configuration we can't access to internet from the Sonicwall. But Sonicwall can "ping" the 192.168.100.1 ip of the Starlink routeur. If we connect a client computer directly to Starlink ethernet adaptater in place of Sonicwall, the pc client get an IP in 100.79.XX.XX (mask 255.192.0.0) with 100.64.0.1 as gateway and Internet works fine. I don't understand why the interface of the Sonicwall can't get a DHCP adress from the Starlink routeur but a pc client can get it... Thanks for your help