No internet - DHCP

Forum|Forum|1 year ago
April 26, 2025
2 replies
706 views

Hi,

This query is related to DHCP.

I configured the DHCP lease time to 7 days, and everything is functioning correctly overall. However, a few users encountered an issue where they received an IP from DHCP but were unable to access the internet. Releasing and renewing the IP resolved the problem.

Upon investigation, I discovered a known issue (Bug ID: 1069208) in v7.4.7 related to DHCP.

Bug ID: 1069208 indicates that if a DHCP offer contains padding while using a DHCP relay, the relay removes the padding before forwarding the packet.

Please confirm whether this bug is related to the issue we are facing.

#fortigate

FortiGate

funkylicious

SuperUser

hi,

it maybe the case that you hit that bug, if your FGT acts as a relay and not the server itself that assigns ip to users.

how is the issue manifesting? do they get a valid ip/dns/gateway ? does ping towards 8.8.8.8 work or is it more a dns issue where they cannot resolve hostname into an ip ?

have you done any tshoot while this is happening or can you reproduce the issue ?

"jack of all trades, master of none"