A question about Tor and OpenVPN

I launched a test server with Tor and OpenVPN and configured OpenVPN to use Tor. The Tor configuration is as the following:

AutomapHostsOnResolve 1

And Tor service is running:

# netstat -tulpen | grep tor
tcp        0      0 *               LISTEN      0          17809      982/tor             
tcp        0      0*               LISTEN      0          17807      982/tor             
udp        0      0*                           0          17808      982/tor             

I used the following iptables rules:

# export OVPN=tun0
# iptables -A INPUT -i $OVPN -s -m state --state NEW -j ACCEPT
# iptables -t nat -A PREROUTING -i $OVPN -p udp --dport 53 -s -j DNAT --to-destination
# iptables -t nat -A PREROUTING -i $OVPN -p tcp -s -j DNAT --to-destination
# iptables -t nat -A PREROUTING -i $OVPN -p udp -s -j DNAT --to-destination

It works. When a client connects to my server via OpenVPN client, then his\her connection tunneled via Tor.

On the real server, I’m using Tor as a proxy server and its Tor configuration is as the following:

RunAsDaemon 1
DataDirectory /var/lib/tor

As you see, Tor is listening to IP not IP. Could this cause a problem? I mean, Tor must be listening to for OpenVPN to use it?

Thank you.