虚拟机No route to host

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今天在虚拟机上部署了一个socket服务，使用python socket模组进行端口连接时一直报错，

>>> import socket
>>> s=socket.socket()
>>> s.connect(('192.168.137.141',9988))
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib64/python2.7/socket.py", line 224, in meth
    return getattr(self._sock,name)(*args)
socket.error: [Errno 113] No route to host
>>> 

通过netstat -anp 9988 查看确定服务已经启动，而且ping也能ping通说明网络没问题

[root@localhost nlpplat]# netstat -anp|grep 9988
tcp6       0      0 :::9988                 :::*                    LISTEN      33758/java

[root@localhost ~]# telnet 192.168.137.141 9988
Trying 192.168.137.141…
telnet: connect to address 192.168.137.141: No route to host

最终定位为防火墙问题

把防火墙关掉就行了

systemctl status firewalld
systemctl stop firewalld

或者把对应的端口放开

firewall-cmd --zone=public --add-port=9988/tcp --permanent

firewall-cmd --reload