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No IP from WAN interface

My ISP recently had a problem where the main fibre connection was cut and the internet was down for two days since this has returned I have cycled my ISP router from standard to modem mode and my USFF Machine running ESX with a VM for Sophos XG no longer picks up an IP via DHCP on the WAN interface.

This previously used to happen when I'd deploy a fresh VM for Sophos and I'd have to keep redeploying a fresh image until it worked.

No matter how many times I power cycle and wait I still can't get an IP from the router in modem mode from an unchanged/fresh install.

Is there any tricks/special rules/commands I'm overlooking to force this to occur?

My current configuration is: Modem mode router -> single interface to ESX host (WAN) -> second interface from ESX host to gigabite switch (LAN)

These are in seperate port groups and correctly mapped in ESX and botha ctive in Sophos:



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  • In the past I had an ISP that only would give me a public IP-address on a device that they have registered the MAC-address of.

    So when I would need to exchange the router, I would either need to spoof the WAN MAC-address or have the ISP register the new MAC-address before I would get a valid public IP-address. Maybe the same is true for your ISP.

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