FortiGate ICMP ECHO before DHCP Offer

[martyyy]

Hi,

Is it possible to have the Fortigate perform a ICMP-ECHO to a IP Address before it sends a DHCP Offer to a client device. Have had an issue with duplicate IP Addresses on overlapping scopes / ranges that have static IP Addresses configured. This could be resolved with the DHCP server testing to see if the IP address is already in use in advance rather than relying on the client device to perform this function, I.E sending out an arp before accepting the DHCP Offer.

Any help would be much appreciated, thankyou.

[unkolko2]

So I would troubleshoot this backwards, enable dhcp on firewall first even if for one ip on that range and test, if it works then disable and look at forward traffic logs and u might see a block here somewhere if traffic is flowing through the firewall.