I have a multihomed system running Windows 2008 Server Enterprise, and I'm trying to share an Internet connection on a USB wifi adapter with the other networks attached to the system.
To that end, I have installed DHCP, DNS and Routing and Remote Access services. DHCP and DNS are working well, but NAT is the problem.
In this location:
Network Polic and Access Services
Routing and Remote Access
IPv4
NAT
I have added all my internal network interfaces as private interfaces (the wifi adapter didn't show up in the list), and when I try to "New Interface...", to add the USB wifi adapter as a public interface, I just get this dialog box:
---------------------------
Routing and Remote Access
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No new router interfaces are available for addition.
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OK
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For example, netsh routing ip nat show global outputs this data:
netsh routing ip nat>show interface
NAT Local Wired Configuration
---------------------------
Mode : Private Interface
NAT Local Wireless Configuration
---------------------------
Mode : Private Interface
NAT Internal Configuration
---------------------------
Mode : Private Interface
And netsh routing ip show interface shows this data:
netsh routing ip>show interface
State Type Interface
---------- ----------- ---------------------------------------------
Enabled Dedicated {6EABF40E-36FA-4AEA-9524-E967F73E0348}
Enabled Dedicated Local Wired
Enabled Dedicated Local Wireless
Enabled Internal Internal
Enabled Loop Back Loopback
(I am wondering if the GUID-named adapter is the wifi adapter.)
Here's the output of ipconfig /all for the relevant wifi adapter:
Wireless LAN adapter Inet:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Belkin Wireless G USB Network Adapter #2
Physical Address. . . . . . . . . : 00-17-3F-8F-76-75
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::cd31:4169:aead:c138%13(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.100.1(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.100.254
DNS Servers . . . . . . . . . . . : 192.168.100.1
NetBIOS over Tcpip. . . . . . . . : Enabled
(It's #2 because I unplugged it and re-added it back at some time in the past.)
I'm posting this question from the server and the USB wifi interface is the only way it can get out, so it's certainly working. I just can't figure out how to make NAT know about it.
