What are the typical Ip addresses for NAT?

[ECIT-2]

Hi all;

I recently re-installed my os x and re-installed fusion. I think by default, the NAT was set and I recieved an IP address of 172.16.182.2. The gateway was simliar.

Just for piece of mind, is this typical for vm nat? (like 192.168.1.1 for home routers?) I tried searching for it, but either I turn up nothing or ambigous corelations which would concern me.

TIA

EC

[WoodyZ]

It all depend on which OEM's Router you're talking about however they all should conform to RFC 1918 so have a look at: RFC 1918: Address Allocation for Private Internets

As long as the Subnets being used for the Virtual Networks conforms to RFC 1918 and are not the same Subnet that the Host itself is on then you have nothing to be concerned about. Also if you want to modify the IPAddress of the Subnets being used then have a look at:

Forgot to mention the Linksys for an example uses 192.168.1.0 as the default IP Address Subnet in its Consumer version Routers while D-Link uses 192.168.0.0 and I've seen other OEM's the use 10.x.x.x or 172.16.x.x IP Addresses however they all should conform to RFC 1918.

Message was edited by: WoodyZ

[ECIT-2]

Ok, so the 172.16.x.x IP is a typical, internal lan ip vs. someone else's IP address via the internet? I'm not an networking expert, but from the looks of your link that what I seeing. I just wanted to make sure this was Fusion default ip scheme for its software NAT. I never saw the 172.16.x.x before and was wondering where it was coming from. I switched it to bridged networking and saw my familiar linksys ip (192.168.x.x).

EC

[WoodyZ · Accepted solution]

Ok, so the 172.16.x.x IP is a typical, internal lan ip vs. someone else's IP address via the internet? I'm not an networking expert, but from the looks of your link that what I seeing. I just wanted to make sure this was Fusion default ip scheme for its software NAT. I never saw the 172.16.x.x before and was wondering where it was coming from. I switched it to bridged networking and saw my familiar linksys ip (192.168.x.x).

Yes as the RFC states...

3. Private Address Space

The Internet Assigned Numbers Authority (IANA) has reserved the

following three blocks of the IP address space for private internets:

10.0.0.0 - 10.255.255.255 (10/8 prefix)

172.16.0.0 - 172.31.255.255 (172.16/12 prefix)

192.168.0.0 - 192.168.255.255 (192.168/16 prefix)

Anything in these ranges is Private and can be used internally.

[ECIT-2]

Indeed, Thank you.