LVS
lvs-users
Google
 
Web LinuxVirtualServer.org

RE: Is this possible?

To: "'LinuxVirtualServer.org users mailing list.'" <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: RE: Is this possible?
From: "Bishop, Cass" <cbishop@xxxxxxxx>
Date: Fri, 22 Oct 2004 10:40:11 -0500
> 
> Hello,
> 
> > I'm trying to get LVS to work in a different configuration 
> than I normally
> > do and I'm running into some problems.  Here is the setup:
> 
> What kind of problems?

I the connection does not work.

> 
> > Clients
> >     |
> > Hit external address
> > ----------Firewall----------
> > NATS the external address to 172.27.82.4
> 
> So you do a port translation for the VIP. All outgoing 
> traffic from here will be 
> having the srcIP of your firewall unless you use transparent 
> proxying. This 
> might yield severe load imbalance.

I see the client IP and not the firewall IP in my logs when I get hits
through the firewall so I'm guessing it's transparent.

> 
> > Director - IP:172.27.82.3
> >          - VIP:172.27.82.4
> > 
> > ----------Firewall----------
> 
> Is this firewall bridging two collision domains? ITIM: Do, 
> loosly speaking, 
> 172.27.0.0/?? and 172.20.0.0/?? express two different 
> physical networks? 

Yes

> If so, 
> what kind for LVS forwarding method did you choose? 

LVS-NAT

> ("Almost") Only LVS_TUN will 
> work in a network topology like that. You could technically 
> use LVS_NAT, however 
> this would be a rather strange setup. If I may be so impolite 
> as to mention your 
> placing of the second firewall is rather found wanting.

The network guys wanted a DMZ

> 
> > Real Server 1 - IP:172.20.6.12
> > Real Server 2 - IP:172.20.6.13
> > 
> > I normally use LVS in a single network setup so this is new 
> to me.  Am I
> > going about this the wrong way?  Is this even possible  All of the
> > documentation I've looked through doesn't seem to apply to 
> my configuration.
> 
> Check out the documentation on LVS_TUN, if you need to load 
> balance across 
> collision domains, within private addressable IP ranges.
> 
> > CONFIDENTIALITY NOTICE:  The information in this e-mail is 
> privileged and
> > confidential.  Any use, copying or dissemination of any 
> portion of this
> > e-mail by or to anyone other than the intended recipient(s) 
> is unauthorized.
> > If you have received this e-mail in error, please reply to 
> sender and delete
> > it from your system immediately.
> 
> This statement reminds me of a mixture of Moebius and M.C. 
> Escher ... [1]

This is automaticall appended to every email I send by our exchange server.

> 
> [1] http://www.mcescher.com/Gallery/recogn-bmp/LW408.jpg
> 

CONFIDENTIALITY NOTICE:  The information in this e-mail is privileged and
confidential.  Any use, copying or dissemination of any portion of this
e-mail by or to anyone other than the intended recipient(s) is unauthorized.
If you have received this e-mail in error, please reply to sender and delete
it from your system immediately.
<Prev in Thread] Current Thread [Next in Thread>