Multiple Interfaces on LAN DHCP table?



  • I think I'm having a brain cramp that's not allowing me to visualize this.

    I have usually setup pfsense boxes with each interface being a different subnet (each having its own purpose, etc.).

    I'd like to add a quad NIC to a machine that you can just plug an ethernet cable into any of the 4 interfaces and it pulls an IP from the LAN DHCP server. Does that make sense?

    Almost like a retail/linksys router where you just turn on DHCP server and you can plug cables into any interface and it'll work.

    Sorry for such a basic question - have always used each interface as a seperate subnet and a switch attached to each interface to handle that traffic.



  • @pf2.0nyc:

    I'd like to add a quad NIC to a machine that you can just plug an ethernet cable into any of the 4 interfaces and it pulls an IP from the LAN DHCP server. Does that make sense?

    Almost like a retail/linksys router where you just turn on DHCP server and you can plug cables into any interface and it'll work.

    If you want to have a pfSense acting as a router, just configure DCHP server and then bridge all interfaces you want to 'share' lan.

    BUT you will need crossover lan cables to link machines to firewall on this scenario.



  • @marcelloc:

    If you want to have a pfSense acting as a router, just configure DCHP server and then bridge all interfaces you want to 'share' lan.

    But, for security reasons, you might not want to allow "casually connected" computers access to all your LAN systems.

    @marcelloc:

    BUT you will need crossover lan cables to link machines to firewall on this scenario.

    Quite a number of modern NICs have auto polarity sensing so don't require cross over cables when connecting two computers together. You MIGHT require crossover cables.



  • So I just bridge interfaces with the LAN and that's it?

    The NICs I'm running are all Intel Pro 1000 PT Quad NICs that will be bridged to a LAN interface (also an Intel Pro 1000 PT).



  • Yes.  :)
    Just dont forget that pfsense 2 needs a wan interface.

    You can have it only with wan, but not only with lan.



  • thx so much for the help! I really appreciate it!



  • OK I have 2x PCI-X slots filled with dual Intel Pro 1000 MT Quad NICs and I have 3x PCI-e (various x16, x8, etc.) filled with Intel Pro 1000 PT Quad cards.

    I bridged over 12 interfaces on the MT and PT cards so I could try and keep everything contained to one box - and CPU usage spiked to over 48% (from 3%) and memory usage spiked to over 22% (from 2%) (2x Xeon x5060 @ 3.2ghz 4threads per CPU and 4GB ddr2 @ 667mhz).

    The thing shut down - thermal halt on CPU.

    What did I do wrong? This isn't climate controlled but temps in the room are 69-70* F and humidity is acceptable.



  • @pf2.0nyc:

    temps in the room are 69-70* F and humidity is acceptable.

    That's nice but the significant temperature is the one in the CPU die. Perhaps you don't have enough air flow through your box, maybe the CPU heatsink is too small etc.

    There has been some discussion recently (in the hardware forum if I recall correctly) about use of the coretemp kernel module to monitor CPU temperatures. You might find some useful ideas in that discussion.


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