Multiple IP to one MAC

voytec

How can I assign multiple IPs to single MAC address in DHCP?

podilarius

I don't know if that is possible. Are you going to be assigning it to a different subnet? In *nux you can create a virtual interface and have it setup for dhcp. You should be able to assign based on that. I don't know about windows os. unless you are setting a reservation, it is just going to get a different address in the same network and no do any real good.

voytec

now I've double NAT 1:1

router on FreeBSD (natd, ipfw):
WAN: publicIP /24 with "IP Alias" publicIP_1, publicIP_2, publicIP_3
LAN: static_DHCP with StaticARP 10.10.0.0/24
NAT 1:1: publicIP_1 <-> 10.10.0.100,
publicIP_2 <-> 10.10.0.101,
publicIP_3 <-> 10.10.0.102

and in LAN network pfSense box:
WAN IP from DHCP: 10.10.0.100 with "IP Alias" 10.10.0.101, 10.10.0.102
local_LAN: 192.168.0.1/24
NAT 1:1: 10.10.0.101 <-> 192.168.0.10,
10.10.0.102 <-> 192.168.0.20

in local_LAN:
Server1 IP: 192.168.0.10
Server2 IP: 192.168.0.20

and working efect:
publicIP_1 <-> 10.10.0.100 (pfsense b0x)
publicIP_2 <-> 192.168.0.10 (Serwer_1)
publicIP_3 <-> 192.168.0.20 (Serwer_1)

I must change FreeBSD router to pfSense and I do not know how to do this configuration.

I know that this DHCP configuration does nosense but is associated with StaticARP.

podilarius

Basically it will work the same way freebsd router. You will create WAN address and then assign either IP alias or CARP to WAN IPs. Then you will use the 1:1 NAT to point publicip_1 to privateip_1. Then you will create all the rules associated with that. Are you looking to get rid of the double NAT or are you replacing the router with a different pfsense machine? What is your current dhcp config?

voytec

@podilarius:

Are you looking to get rid of the double NAT or are you replacing the router with a different pfsense machine? What is your current dhcp config?

How to configure pfsense routers for this
87.92.15.10 <–> 192.168.0.10
87.92.15.20 <--> 192.168.0.20

the problem is: staticARP works only with staticDHCP, but I can't add two identical MACs for 10.10.0.100, 10.10.0.101, 10.10.0.102

net.jpg_thumb

wallabybob

@voytec:

How to configure pfsense routers for this
87.92.15.10 <–> 192.168.0.10
87.92.15.20 <--> 192.168.0.20

On pfSense 1 create 1:1 NAT (Firewall -> NAT, 1:1 tab) on the WAN interface: 87.92.15.10 –> 192.168.0.10 and 87.92.15.20 --> 192.168.0.20 and add a static route to 192.168.0.0/24 with gateway 10.10.0.100. You will also need to disable NAT on pfSense2.

podilarius

I don't know about IP Alias, but if you used CARP instead, the MAC Addresses will be slightly different. Are you hard assigning the addresses even though they are in DHCP reservations?