Freeradius DHCP and "Failed adding ARP entry: Failed to add entry in ARP cache: Operation not permitted (1)"

[Alan DeKok]

On Aug 2, 2021, at 3:57 PM, CpServiceSPb <cpservicespb at gmail.com> wrote:
> 
> I may be wrong.
> But I detected that the issue appears for udp 0 0.0.0.0:67 only.
> If there is udp unicast_IP:67 (for example udp 192.168.0.254:67 - packets
> receiving from relays) , there is no such issue.

  Yes... if the address is unicast, then ARP works.

  FreeRADIUS could create DHCP packets itself and send them.  But that also requires opening a "raw" socket.  So it will still need special permissions.

  Alan DeKok.