Fallback to apache on director with ldirectord

[Guy Waugh <gwaugh@xxxxxxxxxx>]

Hi folks,

I'm trying to set up a simple fallback server on the LVS director for a 
port 80 apache service, such that if all the real servers for the apache 
service are down, the service will fall back to apache on the director. 
We run an LVS-NAT system with two real servers and about 30 active 
apache virtual hosts.
I have this in my ldirectord.cf file (IPs changed to protect the innocent):

virtual=10.0.0.1:80
        real=192.168.1.1:80 masq
        real=192.168.1.2:80 masq
        fallback=127.0.0.1:80 masq
        quiescent=no
        checktype=connect
        service=none
        scheduler=wlc
        persistent=600
        protocol=tcp

When apache on the real servers is shut down, 'ipvsadm -L' shows that 
the service has fallen back to 127.0.0.1:80 (as do the ldirectord logs), 
but I can't connect to the service - it says 'connection refused'. I'm 
trying to connect from my workstation, and the connection works fine 
when apache on the real servers is up and running.
When the service is in fallback mode, I can telnet to port 80 on 
127.0.0.1 from the director, and a 'GET / HTTP/1.1' with a correct HTTP 
Host: header works, so apache on the director is answering requests to 
127.0.0.1 port 80. The problem seems to be that the LVS code isn't 
handing the connection from my workstation off to 127.0.0.1:80 - it 
doesn't in fact seem to be listening to connections at all.
Anyone have any ideas on what I could try?

PS Director is RHEL3, Ultramonkey 3.

Thanks,
Guy.