On Saturday 29 June 2002 7:21 pm, Tim wrote: > Hi everyone, > > On my firewall box, as mentioned previously, I have > three NICs. On PCI slot 1: video card; PCI slot 2: 1st NIC; PCI slot 3: 2nd > NIC; PCI slot 4: 3rd NIC. Now, eth0 would be the 1st NIC on slot 2 ? Is > this correct ? I need to confirm this in order to know which NIC Iam going > to plug into on the firewall box from the router [location of eth0, eth1, > eth2], the LAN, and the DMZ and also write rules for the different chains.
You'll have to plug in some cables and find out :-) The order in which your NICs get allocated as eth0, eth1, eth2 depends mainly on what chipset they are (the kernel will initialise chipsets in a certain order, so if your NICs have different chipsets this is what will determine which gets called eth0, which eth1 etc), alternatively on what order you load modular drivers (if that's the way you compiled your kernel), but it also depends signiicantly on your motherboard / Bios - generally you will find the NICs get initialised in order from one end of the PCI bus towards the other (but until you try, you don't know which end it starts from), but even this sensible sequencing is not actually guaranteed. I suggest the way to do it is to allocate an address in your LAN range to eth0, and an address in your DMZ range to eth1, ping something on your LAN from the firewall, and then just plug each of the three NICs into your LAN switch in turn. Once you've worked out which is eth0, do the same thing for eth1 (this will almost certainly be the NIC in the middle), and then you know the other one is eth2. Antony.
