rsync: failed to connect to x.x.x.x: No route to host

原因：防火墙设置

解决办法：打开873端口

#iptables -I INPUT -p tcp -m state –state NEW -m tcp –dport 873 -j ACCEPT
#iptables -I INPUT -p udp -m state –state NEW -m udp –dport 873 -j ACCEPT