Author Topic: IP Forward IPv4 public IPs  (Read 1203 times)

brodock

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IP Forward IPv4 public IPs
« on: March 07, 2013, 03:23:23 pm »
Hello,

I've used for many years pfsense as our firewall and public gateway. We have a bunch of public IPs (class C /27) that are enough for all the machines outsite the firewall, and we want that every machine be given one of that public IPs and work transparently without any kind of NAT or port forwarding. I understand that many here uses NAT because they have less public IPs than they really need.

Here is my current setup:

eth0 : xxx.xxx.xxx.129 static (LAN - 255.255.255.224, plugged on the same switch that the other machines are plugged in)
eth1 : xxx.xxx.yyy.137 static (WAN - 255.255.255.248)
eth1 gateway: xxx.xxx.yyy.142

dhcp is configured to provide a subset of our external ips and every machine is able to connect to the internet without any problem, BUT they are under NAT, from what I have observed.

every machine behind the gateway shows as their public ip, the "xxx.xxx.yyy.137" configured as the WAN ip. Is there any thing I have to configure to disable this "nat" behavior?

It worked "just fine" with pfsense.