DHCP scope,

[greg whynott]

Hi,

Is it possible to have the pfSence fw provide DHCP services to a network
which lives one hop beyond the pfsence's INSIDE directly connected network?
On the router i configured an ip-helper address, i then went to configure
the pfsecne's DHCP service but it is complaining about the network not
matching that of the network which the INSIDE interface is within. is
there a way around that? (is it ok to edit files manually without breaking
things)..


OUTSIDE==[pfS-FW]==[router]==[network requiring DHCP]


i've already brought up a DHCP server elsewhere, but thought i'd ask about
this anyway. having scopes which don't match an interface connected to the
DHCP server(pfsence) doesn't seem like an uncommon thing, i just wanted to
make sure i wasn't missing a config option somewhere, and ask...

thanks!

greg

[Jochem de Waal]

Hi Greg,



On your router you should configure a DHCP helper address (IP of your
pfSense box) for DHCP relaying.



Cheers,



Jochem



________________________________

Van: greg whynott [mailto:greg.whynott-***@public.gmane.org]
Verzonden: maandag 29 augustus 2011 22:05
Aan: support-***@public.gmane.org
Onderwerp: [pfSense Support] DHCP scope,



Hi,

Is it possible to have the pfSence fw provide DHCP services to a network
which lives one hop beyond the pfsence's INSIDE directly connected
network? On the router i configured an ip-helper address, i then went
to configure the pfsecne's DHCP service but it is complaining about the
network not matching that of the network which the INSIDE interface is
within. is there a way around that? (is it ok to edit files manually
without breaking things)..


OUTSIDE==[pfS-FW]==[router]==[network requiring DHCP]


i've already brought up a DHCP server elsewhere, but thought i'd ask
about this anyway. having scopes which don't match an interface
connected to the DHCP server(pfsence) doesn't seem like an uncommon
thing, i just wanted to make sure i wasn't missing a config option
somewhere, and ask...

thanks!

greg

[greg whynott]

Thanks Jochem, but as mentioned in the post, I did that. its the multi
scope thing i was wondering about.

greg

**
Hi Greg,****
** **
On your router you should configure a DHCP helper address (IP of your
pfSense box) for DHCP relaying.****
** **
Cheers,****
** **
Jochem****
** **
------------------------------
*Verzonden:* maandag 29 augustus 2011 22:05
*Onderwerp:* [pfSense Support] DHCP scope,****
** **
Hi,
Is it possible to have the pfSence fw provide DHCP services to a network
which lives one hop beyond the pfsence's INSIDE directly connected network?
On the router i configured an ip-helper address, i then went to configure
the pfsecne's DHCP service but it is complaining about the network not
matching that of the network which the INSIDE interface is within. is
there a way around that? (is it ok to edit files manually without breaking
things)..
OUTSIDE==[pfS-FW]==[router]==[network requiring DHCP]
i've already brought up a DHCP server elsewhere, but thought i'd ask about
this anyway. having scopes which don't match an interface connected to the
DHCP server(pfsence) doesn't seem like an uncommon thing, i just wanted to
make sure i wasn't missing a config option somewhere, and ask...
thanks!
greg
****

[Chris Buechler]

Post by greg whynott
Hi,
Is it possible to have the pfSence fw provide DHCP services to a network
which lives one hop beyond the pfsence's INSIDE directly connected network?
  On the router i configured an ip-helper address,  i then went to configure
the pfsecne's DHCP service but it is complaining about the network not
matching that of the network which the INSIDE interface is within.    is
there a way around that? (is it ok to edit files manually without breaking
things)..
OUTSIDE==[pfS-FW]==[router]==[network requiring DHCP]
i've already brought up a DHCP server elsewhere,  but thought i'd ask about
this anyway.   having scopes which don't match an interface connected to the
DHCP server(pfsence) doesn't seem like an uncommon thing,   i just wanted to
make sure i wasn't missing a config option somewhere,  and ask...

Not possible. Not uncommon to have deployments like that, but first
I've heard of anyone with a network like that wanting to run DHCP on
the firewall, generally those networks have a DHCP server in place
elsewhere.

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[greg whynott]

Thanks Chris. this is for an internal 'sandbox' environment for
employees with another firewall before the internet. I've set up many DHCP
servers on unix with multiple scopes, guess i figured it could be done here
since its a unix router.

anyway, so i have my answer, thanks much!

greg




On Mon, Aug 29, 2011 at 6:28 PM, Chris Buechler

Post by Chris Buechler
Not possible. Not uncommon to have deployments like that, but first
I've heard of anyone with a network like that wanting to run DHCP on
the firewall, generally those networks have a DHCP server in place
elsewhere.
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