我已经禁用了selinux /etc/sysconfig/selinux：
SELINUX=disabled\n重新启动并禁用这两个firewalld服务iptables。
# sestatus\nSELinux status: disabled\n\n# systemctl status firewalld\n\xe2\x97\x8f firewalld.service - firewalld - dynamic firewall daemon\n Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)\n Active: inactive (dead)\n Docs: man:firewalld(1)\n\n# systemctl status iptables\n\xe2\x97\x8f iptables.service - IPv4 firewall with iptables\n Loaded: loaded (/usr/lib/systemd/system/iptables.service; disabled; vendor preset: disabled)\n Active: inactive (dead) \n\n# ufw status\nStatus: inactive\n我仍然无法使用特定端口访问服务器：
\n\n# nc -v 10.0.12.3 8887\nnc: connect to 10.0.12.3 port 8887 (tcp) failed: Connection refused\n我可以 …