[K12OSN] Linux boxes can't get to internet

"Terrell Prudé Jr." microman at cmosnetworks.com
Fri Apr 13 14:54:18 UTC 2007

Sudev Barar wrote:
> On 13/04/07, rowens at ptd.net <rowens at ptd.net> wrote:
>> I switched DHCP services from my Active Directory domain controller
>> to my LTSP
>> box (still using Windows DNS).  Now my standalone Linux boxes can't
>> access the
>> internet or Windows network shares.  All the Windows boxes work fine,
>> and the
>> thin clients work fine.  Any ideas what I screwed up?
> most likely you need to set ip_forward = 1 in /etc/sysctl.conf (I am
> on debian system right now and this may be slightly different in
> RH?Fedora box) You will need to restart networking after editing this.

Here's the general way to do it with any Linux-based system, be it
Slackware, Red Hat, *ubuntu, whatever:

  echo 1 > /proc/sys/net/ipv4/ip_forward

This assumes that your standalone Linux boxes are on the LTSP client
subnet.  You will also have to turn on IP masquerading, which should
already be on by default, I believe.


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