Tomcat实现session复制再开启iptables后，session无法复制

Question

Tomcat实现session复制再开启iptables后，session无法复制

Tomcat实现session复制再开启iptables后，session无法复制

<Membership className="org.apache.catalina.tribes.membership.McastService"
address="228.0.0.1"
port="45564"
frequency="500"
dropTime="3000"/>
<Receiver className="org.apache.catalina.tribes.transport.nio.NioReceiver"
address="192.168.1.20"
port="4001"
autoBind="100"
selectorTimeout="5000"
maxThreads="6"/>

iptables开启了4001与45564的TCP与UDP端口，可是只要一开始防火墙再启动tomcat就无法实现session复制功能，难道还有别的端口要开启么？