Take the 2-minute tour ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

I use macmini to compile mac version of my program, I use ssh and vnc from linux, but problem is that I can only get either internet via wifi(en1) or local connection via ethernet(en0). if I do enable ethernet (en0) connection the internet is no longer working, although the wifi(en1) interface is still active. I suspect it is a routing problem. I have been trying for hours using route delete and route add 0.0.0.0 ..., netstat -na etc, but since I lack some knowledge my attempts lack consistency. I need both, lan for vnc and wifi for internet. VNC is slow over wifi and internet is required as well for some reasons.

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
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        options=b<RXCSUM,TXCSUM,VLAN_HWTAGGING>
        ether a8:20:66:36:21:ea
        inet6 fe80::aa20:66ff:fe36:21ea%en0 prefixlen 64 scopeid 0x4
        inet 192.168.1.101 netmask 0xffffff00 broadcast 192.168.1.255
        media: autoselect (100baseTX <full-duplex,flow-control>)
        status: active
en1: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        ether 88:53:95:2a:a2:89
        inet6 fe80::8a53:95ff:fe2a:a289%en1 prefixlen 64 scopeid 0x5
        inet 192.168.88.140 netmask 0xffffff00 broadcast 192.168.88.255
        media: autoselect
        status: active

Thank you very much!

share|improve this question

1 Answer 1

I shall try to guess at what the problem might be... As I'm probably going to state incorrect assumptions, please correct me, and I'll try again with the new information.

I assume both interfaces are being configured via DHCP. In that case, both your eth0 interface and your eth1 interface are receiving a 'gw' ip from their respective DHCP servers. Since the eth0 interface does not have a route to the Internet (a valid gw), whenever it is enabled, your connection to the Internet is dropping.

To make your Wi-Fi interface take precedence over the LAN interface, go into System Preferences..Network, and look for the gear icon in the lower left. Pull it down and select 'Set Service Order'. A new window will pop up. Drag Wi-Fi so that it's above Ethernet (or drag Ethernet so that it's below Wi-Fi), click OK to dismiss the service order window, then Apply in the main network window. This ought to give Wi-Fi a preferred status over your Ethernet connection.

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.