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List:       freeradius-users
Subject:    Re: How do I point a client to a unicast DHCP server?
From:       Alan DeKok <aland () deployingradius ! com>
Date:       2021-11-11 13:17:45
Message-ID: 5AD528C4-F5AF-4707-B796-B04A7F688264 () deployingradius ! com
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On Nov 11, 2021, at 5:50 AM, Selahattin CILEK <selahattin_cilek@hotmail.com> wrote:
> 
> I am using FreeRADIUS 3.0.23 to deliver services on pfSense 2.5.2 ( FreeBSD 12.2).
> 
> Because of some rogue users, I have to issue each device a static IP address. I \
> know I can do this thanks to the *dhcp_sqlippool* mod, but reading the *dhcp* site \
> provided by the default install, I ran into this sentence: 
> FreeBSD does *not* support binding sockets to interfaces. ...
> 
> 
> I know a solution is suggested in the same paragraph, but I will do that only as a \
> last resort. 
> 
> I went ahead and added *dhcp* to *sites-enabled* anyway and then ran FreeRADIUS in \
> debug mode (radiusd -X). It was a success:

  That's good.

> So I see I can still use the DHCP functionality, but with a caveat: I must somehow \
> get the client to ask for an IP address directly from the router's LAN IP address. 
> So my question is: Can I somehow get the clients to use unicast DHCP? In other \
> words, is there some sort of RADIUS attribute I can inject into the authentication \
> reply so that it will know where to get its IP from?

  You configure the switch to act as a DHCP gateway.  It will take all DHCP packets \
from the client, and unicast them to the DHCP servers IP address.

  See your switch configuration for how to do this.

  Alan DeKok.


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