Re: NAT FTP Clients and Linux-2.6 on Load-Balancer

To: " users mailing list." <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: NAT FTP Clients and Linux-2.6 on Load-Balancer
From: Donald J Giuliano <guido@xxxxxxxxxxxxxxxxxxxxx>
Date: Tue, 30 Aug 2005 18:05:09 +0000
Actually, to clarify, it is only active FTP that fails on the new 
load-balancers.  Passive FTP works fine.  It should also be noted that 
active FTP has no trouble whatsoever on the current machines running 


On Tue, 2005-08-30 at 17:30 +0000, Donald J Giuliano wrote:
> Hi,
> I'm currently working to migrate two linux-2.4/keepalived IPVS 
> load-balancers to new machine running linux-2.6/keepalived.  
> Everything works perfectly on the old setup, but on the new machines 
> the load-balanced FTP fails when the client is behind a NAT 
> firewall.  I'm running the Antefacto ipvs-nfct patch on both the 2.4.26 
> and 2.6.12 configuration so that the LBs can also function as 
> firewalls.  I have made no changes to the iptables configuration, 
> other than removing some superfluous rules filtering "unclean" packets, 
> which aren't supported in 2.6 anyway.  All the same IPVS kernel modules 
> are loaded on both machines.  The keepalived configurations are 
> identical.  Any idea what would cause this problem?  

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