telnet: Unable to connect to remote host: No route to host处理过程

启动程序一直报错，端口不通。

# telnet 10.25.116.201 58100
Trying 10.25.116.201...
telnet: connect to address 10.25.116.201: No route to host
telnet: Unable to connect to remote host: No route to host

检查10.25.116.201端口状态：
[root@seven-201 logs]# netstat -an | grep 58100
tcp 0 0 :::58100 :::* LISTEN

检查iptables在运行，停止后即可正常连接，但是这台服务器没做过加固操作。
[root@seven-201 logs]# iptables-save
# Generated by iptables-save v1.4.7 on Fri Aug 7 16:22:06 2015
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [2334:758809]
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited

最后发现是这条REJECT 作怪，删除后即可。