linux下netstat -an看到的列表中IP是空的，这是什么意思？

[llzhe]

如题：
tcp6 0 0 [::]:10053 [::]:* LISTEN
tcp6 0 0 [::]:9094 [::]:* LISTEN
tcp6 0 0 [::]:xinetd [::]:* LISTEN
tcp6 0 0 [::]:7051 [::]:* LISTEN
tcp6 0 0 [::]:7053 [::]:* LISTEN
tcp6 0 0 [::]:7054 [::]:* LISTEN
tcp6 0 0 [::]:50000 [::]:* LISTEN
tcp6 0 0 [::]:8054 [::]:* LISTEN
tcp6 0 0 [::]:9050 [::]:* LISTEN
tcp6 0 0 [::]:9051 [::]:* LISTEN
tcp6 0 0 [::]:9053 [::]:* LISTEN
tcp6 0 0 [::]:zabbix-trapper [::]:* LISTEN
tcp6 0 0 [::]:9092 [::]:* LISTEN

[X-i-n]

LISTEN状态，这不是一条存在的连接，只是一个侦听，表示系统在这些端口上等待客户端来连接

[llzhe]

但是我在别的机器上去telnet 这个ip 的50000端口时，telnet不通啊。

[X-i-n]

检查两个地方，一个是网络通不通，一个是端口开没开。 先检查客户端到这个IP之间，是不是可达，再到iptables或者firewalld检查一下，有没有把端口放行。

[X-i-n]

还有selinux

[llzhe]

两台机器的ip肯定时可达的，因为两台机器在远程登陆， 端口应该也是放行的，所有端口都没有限制。

[llzhe]

iptables 执行如下： root@iZ2zef1hubdcrpqe132hx4Z:~# iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy DROP) target prot opt source destination DOCKER-USER all -- anywhere anywhere DOCKER-ISOLATION all -- anywhere anywhere ACCEPT all -- anywhere anywhere ctstate RELATED,ESTABLISHED DOCKER all -- anywhere anywhere ACCEPT all -- anywhere anywhere ACCEPT all -- anywhere anywhere ACCEPT all -- anywhere anywhere ctstate RELATED,ESTABLISHED DOCKER all -- anywhere anywhere ACCEPT all -- anywhere anywhere ACCEPT all -- anywhere anywhere ACCEPT all -- anywhere anywhere ctstate RELATED,ESTABLISHED DOCKER all -- anywhere anywhere ACCEPT all -- anywhere anywhere ACCEPT all -- anywhere anywhere Chain OUTPUT (policy ACCEPT) target prot opt source destination Chain DOCKER (3 references) target prot opt source destination ACCEPT tcp -- anywhere 192.168.32.2 tcp dpt:7054 ACCEPT tcp -- anywhere 192.168.32.3 tcp dpt:7053 ACCEPT tcp -- anywhere 192.168.32.3 tcp dpt:7051 ACCEPT tcp -- anywhere 192.168.32.4 tcp dpt:7054 ACCEPT tcp -- anywhere 192.168.32.5 tcp dpt:7053 ACCEPT tcp -- anywhere 192.168.32.5 tcp dpt:7051 ACCEPT tcp -- anywhere 192.168.32.7 tcp dpt:7053 ACCEPT tcp -- anywhere 192.168.32.7 tcp dpt:7051 ACCEPT tcp -- anywhere 192.168.32.11 tcp dpt:9092 ACCEPT tcp -- anywhere 192.168.32.12 tcp dpt:9092 ACCEPT tcp -- anywhere 192.168.32.13 tcp dpt:9092 ACCEPT tcp -- anywhere 192.168.32.16 tcp dpt:7050 Chain DOCKER-ISOLATION (1 references) target prot opt source destination DROP all -- anywhere anywhere DROP all -- anywhere anywhere DROP all -- anywhere anywhere DROP all -- anywhere anywhere DROP all -- anywhere anywhere DROP all -- anywhere anywhere RETURN all -- anywhere anywhere Chain DOCKER-USER (1 references) target prot opt source destination RETURN all -- anywhere anywhere