I have a Mac mini running 10.8.2. It connects to the internet over Wi-Fi and everything seems to work. I want to make this Wi-Fi available to another computer connecting to the mini's Ethernet.
My Wi-Fi router is at 10.0.0.1
.
I have experimented with a bunch of static and dynamic settings. This is what I have currently:
mini
Static IP: 192.168.2.1
Netmask: 255.255.255.0
Router: 10.0.0.1
Internet Sharing is set to go from Wi-Fi to Ethernet. In this configuration:
- The mini will serve DHCP address over Ethernet.
- The mini will provide DNS resolution over Ethernet.
- The mini will NOT route packets for external hosts.
- The connected computer can
ping
orssh
to the mini. - The connected computer can resolve DNS.
- The connected computer cannot
ping
the router, Google, or any other external computers.
Here is a small dump of hopefully useful things from the command line:
boots@eiji:~$ ps ax | egrep '(bootp|natp)'
52502 ?? S 0:00.01 bootpd -d -P
52503 ?? S 0:29.94 natpmpd -d -y bridge0 en1
53729 s001 S+ 0:00.00 egrep (bootp|natp)
boots@eiji:~$ ifconfig
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
options=3<RXCSUM,TXCSUM>
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1
inet 127.0.0.1 netmask 0xff000000
inet6 ::1 prefixlen 128
gif0: flags=8010<POINTOPOINT,MULTICAST> mtu 1280
stf0: flags=0<> mtu 1280
en0: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
options=2b<RXCSUM,TXCSUM,VLAN_HWTAGGING,TSO4>
ether 3c:07:54:58:2f:9c
media: autoselect (none)
status: inactive
en1: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
ether 68:a8:6d:58:06:e7
inet6 fe80::6aa8:6dff:fe58:6e7%en1 prefixlen 64 scopeid 0x5
inet 10.0.0.145 netmask 0xffffff00 broadcast 10.0.0.255
media: autoselect
status: active
p2p0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 2304
ether 0a:a8:6d:58:06:e7
media: autoselect
status: inactive
fw0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
lladdr a4:b1:97:ff:fe:d9:44:ca
media: autoselect <full-duplex>
status: inactive
bridge0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
ether ac:de:48:65:39:32
inet 192.168.2.1 netmask 0xffffff00 broadcast 192.168.2.255
Configuration:
priority 0 hellotime 0 fwddelay 0 maxage 0
ipfilter disabled flags 0x2
member: en0 flags=3<LEARNING,DISCOVER>
port 4 priority 0 path cost 0
Best Answer
Matt's answer is actually not a solution but just a workaround. NAT in 10.8.2 is not working because of a bug in pf configuration files. You can find the solution here: http://support.apple.com/kb/TS4418?viewlocale=en_US&locale=en_US