求助 lvs-nat 无法访问real-server 问题

lvs01:
eth0:10.78.60.6
eth1:10.78.104.2
web01:
eth0:10.78.60.1
gw : 10.78.60.6

iptables和selinux已关闭

# cat /proc/sys/net/ipv4/ip_forward
1

#ipvsadm -ln
-> RemoteAddressort Forward Weight ActiveConn InActConn
TCP 10.78.104.2:80 rr
-> 10.78.60.1:80 Route 1 0 0

# ipvsadm -lnc
IPVS connection entries
pro expire state source virtual destination
TCP 00:09 SYN_RECV 10.78.104.3:37018 10.78.104.2:80 10.78.60.1:80

# wget http://10.78.104.2/index.html
--2013-05-13 14:09:42-- http://10.78.104.2/index.html
Connecting to 10.78.104.2:80... failed: Connection refused.

#tcpdump eth1
15:29:09.142659 IP cl01.44365 > 221.228.255.1.domain: 38822+ AAAA? mirror.bit.edu.cn. (35)
15:29:09.412887 IP 10.78.104.3.45564 > 228.0.0.4.45564: UDP, length 69
15:29:09.914868 IP 10.78.104.3.45564 > 228.0.0.4.45564: UDP, length 69
15:29:10.416855 IP 10.78.104.3.45564 > 228.0.0.4.45564: UDP, length 69
15:29:10.918845 IP 10.78.104.3.45564 > 228.0.0.4.45564: UDP, length 69
15:29:11.420837 IP 10.78.104.3.45564 > 228.0.0.4.45564: UDP, length 69
15:29:11.922835 IP 10.78.104.3.45564 > 228.0.0.4.45564: UDP, length 69
15:29:12.424811 IP 10.78.104.3.45564 > 228.0.0.4.45564: UDP, length 69
15:29:12.926799 IP 10.78.104.3.45564 > 228.0.0.4.45564: UDP, length 69
15:29:13.428797 IP 10.78.104.3.45564 > 228.0.0.4.45564: UDP, length 69
15:29:13.659401 IP 10.78.105.253 > 224.0.0.1: igmp query v2

10.78.104.3 是lvs02的eth1 ，lvs01和lvs02的ha都关闭了