How to open the port in the server

 If you want to open an incoming TCP port, type the following in the SSH as root user:

# iptables -I INPUT -p tcp --dport 12345 --syn -j ACCEPT

# service iptables save

 If you want to open an incoming UDP port, type the following in the SSH as root user:

# iptables -I INPUT -p udp --dport 12345 -j ACCEPT

# service iptables save