DMZ INTERFACE not working

Hi Cedric Parent2,

Thank you for reaching out to the Community! 

Did you configure Alias IP with /32 subnet mask? If not, can you try to change that and see if that helps? 

Thanks,

Yes my alias is 27.54.117.39 | 255.255.255.0

Hi,

that is a /24 mask, not a /32 which is 255.255.255.255

Ian

Yes Sorry just One IP disponible 

Hi Cedric Parent2,

One limitation is that the Alias IP/Network is different from the original IP address assigned to the interface. 

Limitation: Traffic from an alias network has to be masqueraded to reach other internal networks. Otherwise, the firewall will drop these packets as "Invalid Packets."

Reference: Sophos XG Firewall: How to configure an IP Alias.

Did you notice traffic being dropped on the firewall?

Thanks,