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Re: 'Hidden' questions

To: Kelly Corbin <kcorbin@xxxxxxxxxxxxxx>
Subject: Re: 'Hidden' questions
Cc: <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
From: Julian Anastasov <ja@xxxxxx>
Date: Wed, 10 Oct 2001 22:55:32 +0000 (GMT)
        Hello,

On Wed, 10 Oct 2001, Kelly Corbin wrote:

> I'm trying to setup a LVS cluster using ipvs, heartbeat and ldirectord
> with a LVS-Tun architecture.  I'm not using the configure scripts, but I
> am consulting them for setup reference.  Here is my question:
> in the rc.lvs_tun script generated, the interface hiding seems to be
> done twice.  First like this:
>
> $ECHO 1 > /proc/sys/net/ipv4/conf/all/hidden

        It is required to enable the feature:

http://www.linuxvirtualserver.org/~julian/hidden.txt

> Then this:
>
> $ECHO 1 > /proc/sys/net/ipv4/conf/${SHORT_DEV}/hidden
>
>
> I understand the second line, but wouldn't the first one make the entire
> machine invisible (i.e. never responding to any ARP requests on any
> interface and could never be connected to)?  Won't the RIP not be
> accessible?
>
> I've read about the whole ARP problem, but I'm still confused about this
> a little bit.
>
> This is running on Linux realservers, of course, with kernel 2.4.6-xfs
> and the hidden patch.
>
> For my own bootup scripts, do I need the first line?

        Yes

> Thanks for any insight anyone has on this.
>
> Kelly


Regards

--
Julian Anastasov <ja@xxxxxx>



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