3 Replies Latest reply: Jul 6, 2013 1:35 PM by jkridner
jkridner Level 1 Level 1 (0 points)

I'm trying to share my WiFi connection on a Macbook Air to a USB-to-Ethernet adapter. I'm very, very, very frustrated at how Apple seems to have broken this feature that used to work on earlier software releases.  I've tried dozens of different fixes and can't even keep them straight anymore.

 

When I turn on Internet connection sharing, 'ifconfig' gives me:

 

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=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500

          ether 04:0c:ce:db:3f:78

          inet6 fe80::60c:ceff:fedb:3f78%en0 prefixlen 64 scopeid 0x4

          inet 192.168.2.37 netmask 0xffffff00 broadcast 192.168.2.255

          media: autoselect

          status: active

p2p0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 2304

          ether 06:0c:ce:db:3f:78

          media: autoselect

          status: inactive

utun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1380

          inet6 fe80::3590:a853:773c:8914%utun0 prefixlen 64 scopeid 0x6

          inet6 fd0f:571b:bba6:6428:3590:a853:773c:8914 prefixlen 64

en1: flags=863<UP,BROADCAST,SMART,RUNNING,SIMPLEX> mtu 1500

          ether c8:a0:30:af:84:4c

          media: autoselect

          status: active

bridge0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500

          ether ac:de:48:05:fe:97

          Configuration:

                    priority 0 hellotime 0 fwddelay 0 maxage 0

                    ipfilter disabled flags 0x2

 

Looking at other answers, I've tried adding my 'en1' USB Ethernet adapter with 'sudo ifconfig bridge0 addm en1', but it gets rejected:

 

ifconfig: BRDGADD en1: Operation not supported on socket

 

I can add my wifi adapter with 'sudo ifconfig bridge0 addm en0' and I can see it now on the 'bridge0' adapter:

 

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

          ether 04:0c:ce:db:3f:78

          inet6 fe80::60c:ceff:fedb:3f78%en0 prefixlen 64 scopeid 0x4

          inet 192.168.2.37 netmask 0xffffff00 broadcast 192.168.2.255

          media: autoselect

          status: active

p2p0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 2304

          ether 06:0c:ce:db:3f:78

          media: autoselect

          status: inactive

utun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1380

          inet6 fe80::3590:a853:773c:8914%utun0 prefixlen 64 scopeid 0x6

          inet6 fd0f:571b:bba6:6428:3590:a853:773c:8914 prefixlen 64

en1: flags=863<UP,BROADCAST,SMART,RUNNING,SIMPLEX> mtu 1500

          ether c8:a0:30:af:84:4c

          media: autoselect

          status: active

bridge0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500

          ether ac:de:48:44:19:92

          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

 

Doesn't do me a darn bit of good though.  The USB Ethernet connection doesn't respond to any DHCP requests.  If I force an IP address on en1 with 'ifconfig en1 192.168.7.1', I lose connectivity.

 

h56-126:~ jason$ ping 192.168.2.37

PING 192.168.2.37 (192.168.2.37): 56 data bytes

64 bytes from 192.168.2.37: icmp_seq=0 ttl=64 time=0.062 ms

64 bytes from 192.168.2.37: icmp_seq=1 ttl=64 time=0.167 ms

^C

--- 192.168.2.37 ping statistics ---

2 packets transmitted, 2 packets received, 0.0% packet loss

round-trip min/avg/max/stddev = 0.062/0.115/0.167/0.053 ms

h56-126:~ jason$ ping 192.168.2.1

PING 192.168.2.1 (192.168.2.1): 56 data bytes

ping: sendto: No route to host

ping: sendto: No route to host

Request timeout for icmp_seq 0

^C

--- 192.168.2.1 ping statistics ---

2 packets transmitted, 0 packets received, 100.0% packet loss

h56-126:~ jason$ ping 192.168.2.1

PING 192.168.2.1 (192.168.2.1): 56 data bytes

ping: sendto: No route to host

ping: sendto: No route to host

Request timeout for icmp_seq 0

ping: sendto: No route to host

Request timeout for icmp_seq 1

ping: sendto: No route to host

Request timeout for icmp_seq 2

^C

--- 192.168.2.1 ping statistics ---

4 packets transmitted, 0 packets received, 100.0% packet loss

h56-126:~ jason$ route -n get default

   route to: default

destination: default

       mask: default

    gateway: 192.168.2.1

  interface: en0

      flags: <UP,GATEWAY,DONE,STATIC,PRCLONING>

recvpipe  sendpipe  ssthresh  rtt,msec    rttvar  hopcount      mtu     expire

       0         0         0         0         0         0      1500         0

h56-126:~ jason$ 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

          ether 04:0c:ce:db:3f:78

          inet6 fe80::60c:ceff:fedb:3f78%en0 prefixlen 64 scopeid 0x4

          inet 192.168.2.37 netmask 0xffffff00 broadcast 192.168.2.255

          media: autoselect

          status: active

p2p0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 2304

          ether 06:0c:ce:db:3f:78

          media: autoselect

          status: inactive

utun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1380

          inet6 fe80::3590:a853:773c:8914%utun0 prefixlen 64 scopeid 0x6

          inet6 fd0f:571b:bba6:6428:3590:a853:773c:8914 prefixlen 64

en1: flags=863<UP,BROADCAST,SMART,RUNNING,SIMPLEX> mtu 1500

          ether c8:a0:30:af:84:4c

          inet 192.168.7.1 netmask 0xffffff00 broadcast 192.168.7.255

          media: autoselect

          status: active

bridge0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500

          ether ac:de:48:05:fe:97

          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

h56-126:~ jason$

 

I'm at my wit's end.


MacBook Air, OS X Mountain Lion (10.8.4)