RE: [CentOS] /etc/sysctl.conf edit not permanent

2008-05-29 Thread Joseph L. Casale
>I expect that you will see "net.ipv4.ip_forward = 1"
>
>Please confirm.
>
>Barry

You were right, thanks for the info.
jlc
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RE: [CentOS] /etc/sysctl.conf edit not permanent

2008-05-28 Thread Barry Brimer

Hi,
I added the following to /etc/sysctl.conf:
net.ipv4.ip_forward = 1
sysctl -p does not show any errors.

So after a #service network restart, I see this:
Shutting down interface eth0:  [  OK  ]
Shutting down loopback interface:  [  OK  ]
Disabling IPv4 packet forwarding:  net.ipv4.ip_forward = 0
[  OK  ]
Bringing up loopback interface:  [  OK  ]
Bringing up interface eth0:  [  OK  ]
Bringing up interface eth1:
Determining IP information for eth1... done.

But a sysctl -p shows the right info after? Is this behavior normal?


I have seen the same thing.  I think what is happening is that when you 
restart networking, it disables packet forwarding.  When you start it, it 
will re-enable.  After you start the network type:

"/sbin/sysctl net.ipv4.ip_forward"

I expect that you will see "net.ipv4.ip_forward = 1"

Please confirm.

Barry
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Re: [CentOS] /etc/sysctl.conf edit not permanent

2008-05-28 Thread John R Pierce

Joseph L. Casale wrote:

What exactly did you add to /etc/sysctl.conf?

Do you have any errors when you run "sysctl -p" on the command line as root?

Filipe



Hi,
I added the following to /etc/sysctl.conf:
net.ipv4.ip_forward = 1
sysctl -p does not show any errors.

So after a #service network restart, I see this:
Shutting down interface eth0:  [  OK  ]
Shutting down loopback interface:  [  OK  ]
Disabling IPv4 packet forwarding:  net.ipv4.ip_forward = 0
[  OK  ]
Bringing up loopback interface:  [  OK  ]
Bringing up interface eth0:  [  OK  ]
Bringing up interface eth1:
Determining IP information for eth1... done.

But a sysctl -p shows the right info after? Is this behavior normal?
  


sysctl -p  reads the /etc/sysctl.conf file and sets whatever options are 
in there, so if you run that, its just putting back what you've said in 
sysctl.conf
It looks like ip_forward is being reset by /etc/init.d/network when you 
pass argument STOP or RESTART (with the network STOPPED, how can there 
be forwarding?)
it does look like /etc/init.d/network START reruns any sysctl.conf 
settings, so its probably turning it back on when the network is 
(re)started if you're setting it in there.




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RE: [CentOS] /etc/sysctl.conf edit not permanent

2008-05-28 Thread Joseph L. Casale
>What exactly did you add to /etc/sysctl.conf?
>
>Do you have any errors when you run "sysctl -p" on the command line as root?
>
>Filipe

Hi,
I added the following to /etc/sysctl.conf:
net.ipv4.ip_forward = 1
sysctl -p does not show any errors.

So after a #service network restart, I see this:
Shutting down interface eth0:  [  OK  ]
Shutting down loopback interface:  [  OK  ]
Disabling IPv4 packet forwarding:  net.ipv4.ip_forward = 0
[  OK  ]
Bringing up loopback interface:  [  OK  ]
Bringing up interface eth0:  [  OK  ]
Bringing up interface eth1:
Determining IP information for eth1... done.

But a sysctl -p shows the right info after? Is this behavior normal?

Thanks!
jlc
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Re: [CentOS] /etc/sysctl.conf edit not permanent

2008-05-28 Thread Filipe Brandenburger
On Wed, May 28, 2008 at 10:39 AM, Joseph L. Casale
<[EMAIL PROTECTED]> wrote:
> I have edited ip forwarding in /etc/sysctl.conf yet when I issue a
> #service network restart I see it get set back to 0.
> Why is that?

What exactly did you add to /etc/sysctl.conf?

Do you have any errors when you run "sysctl -p" on the command line as root?

Filipe
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Re: [CentOS] /etc/sysctl.conf edit not permanent

2008-05-28 Thread John R Pierce

Joseph L. Casale wrote:

I have edited ip forwarding in /etc/sysctl.conf yet when I issue a
#service network restart I see it get set back to 0.
Why is that?
  


I believe that gets set/reset in /etc/sysctl/network* somewhere


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