My system is as below:
Server1: (HTTPD + tomcat1) Server2: (only tomcat2 w/o HTTPD) Apache HTTPD / \ / \ tomcat1 tomcat2
However, I'm not familiar with web programs, so it was difficult and spent a lot of time. (-_-;;) But, I finally succeed in configuring. There was some problems with firewall settings and route configurations. I'd like to share them with you.
1) firewall settings
Check that multicast port is on your UDP open list and the receiver TCP port is also for both machines open! I added below list to iptables.
-A RH-Firewall-1-INPUT -p udp --dport 45564 -d 220.127.116.11 -j ACCEPT -A RH-Firewall-1-INPUT -p tcp --dport 4000 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 4000 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 45564 -j ACCEPT
2) network interface for multicast
# route add -host 18.104.22.168 dev eth0 # netstat -rn Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 22.214.171.124 0.0.0.0 255.255.255.255 UH 0 0 0 eth0 192.168.123.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0 0.0.0.0 192.168.123.254 0.0.0.0 UG 0 0 0 eth0