Your NAT firewall is blocking active FTP.
On 8/30/05, Donald J Giuliano <guido@xxxxxxxxxxxxxxxxxxxxx> wrote:
> 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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