DHCP Broadcasts not seen by radiusd

Alan DeKok aland at deployingradius.com
Wed Jun 18 13:18:03 UTC 2025


On Jun 18, 2025, at 9:16 AM, Hermann.Lauer at uni-heidelberg.de wrote:
>>  If you set 'broadcast = yes' in the configuration, it will accept broadcast packets.
> 
> Which is set, but seems not to show up in the -X debug output.

  Yeah, that's one of the few things which isn't.  We'll take a look at fishing that.

>>  That flag sets a socket option which tells the kernel to forward broadcast packets to FreeRADIUS.
> 
> Found my error:
> ipv4addr = 0.0.0.0
> or
> ipaddr = 0.0.0.0
> needs to be set to recieve non subnet broadcasts.

  Ah yes, that makes sense.  If the socket is only listening on one subject, it won't receive broadcasts to 255.255.255.255

  Alan DeKok.



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