linux centos ssh命令行中，测试远程ipv6的连通性方法，iptables？ 关闭系统ip6tables防火墙

小樱

安装telnet测试工具

1. yum -y install telnet

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测试命令

1. telnet 2001:19f0:6801:d75:5400:1ff:fea5:1eaa

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返回报错
[root@test ~]# telnet 2001:19f0:6801:d75:5400:1ff:fea5:1eaa
Trying 2001:19f0:6801:d75:5400:1ff:fea5:1eaa...
telnet: connect to address 2001:19f0:6801:d75:5400:1ff:fea5:1eaa: Permission denied


看起报错，感觉是这vps服务器有问题。


将所有ip6tables以序号标记显示，执行：

1. ip6tables -L -n --line-numbers

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后来了解到，由于centos系统有两个防火墙，把ipv6防火墙关闭即可

1. service ip6tables stop
   
2. chkconfig ip6tables off

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应该恢复正常，在次测试，确定已经正常工作。
[root@test ~]# telnet 2001:19f0:6801:d75:5400:1ff:fea5:1eaa
Trying 2001:19f0:6801:d75:5400:1ff:fea5:1eaa...
telnet: connect to address 2001:19f0:6801:d75:5400:1ff:fea5:1eaa: Connection refused
[root@test ~]#