[CentOS] Addressing outgoing connections to a specific interface

Dotan Cohen dotancohen at gmail.com
Sat Nov 6 13:29:59 EDT 2010


On Sat, Nov 6, 2010 at 19:10, John R Pierce <pierce at hogranch.com> wrote:
> that temporary route will break his internet access, since 192.168.0.1
> is ALSO his internet gateway on the W-LAN side.
>
> there's no way around this. if you can readdress one or the other LAN,
> then this would just work all the time.
>

This is on the Internet-connected interface:
wlan0     Link encap:Ethernet  HWaddr 00:18:de:98:c7:34
          inet addr:192.168.0.26  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::218:deff:fe98:c734/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:114879 errors:0 dropped:0 overruns:0 frame:0
          TX packets:78945 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:104017653 (104.0 MB)  TX bytes:11292782 (11.2 MB)


And this is on the LAN-connected interface:
eth0      Link encap:Ethernet  HWaddr 00:15:c5:c8:13:d1
          inet addr:192.168.0.101  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::215:c5ff:fec8:13d1/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1921474 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8322288 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:146445850 (146.4 MB)  TX bytes:3479224403 (3.4 GB)
          Interrupt:17

I'm not booted into CentOS at the moment (I just rebooted to Ubuntu
because my Thunderbird mail is there) but I can reboot if there is any
other info that might be relevant. I'm really surprised that it is
this difficult (I don't yet believe impossible!) and just assumed that
I'm doing things wrong. As the saying goes, if in Linux it is getting
difficult, then you are probably doing it wrong! Surely I am not the
first person who is connected to two separate LANs and needs to access
addresses on both of them.

-- 
Dotan Cohen

http://gibberish.co.il
http://what-is-what.com


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