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Sophos XG 19.5 WAN DHCP Client Option 61

Hi,

I have been searching the forum. This question has come up many times over the years without an answer. Actually, there is one answer marked as correct stating that DHCP clients never send data to the server. This is obviously incorrect.

I have been going through the options on my XG firewall trying to find a way to set option 61 for the WAN DHCP client (https://datatracker.ietf.org/doc/html/rfc2132#section-9.14). But have not been able to find it.

Does a method exist where I can set option 61 for the firewall WAN DHCP client? If so, how can I do it.

Please don't post references to how the DHCP server works in Sophos XG firewall, because that doesn't help.

Regards,

William



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  • I know nothing about the ISP except that it is Sky (Sky.com). And they use this option for the client hubs to authenticate with their servers. Unfortunately the hubs provided by Sky do not have a modem option, and I want to avoid a double NAT scenario. Searching through the forum, it is easy to see that this question has come up over and over again without an answer.

    As I see it, my options are as follows:

    1) Use Sophos XG as the DHCP client and configure Option 61

    2) Buy a second router that supports Option 61 in the DHCP client and then connect this to my Sophos XG firewall.