Trên centos 7 bạn có thể mở một port cho firewall với cấu trúc lệnh sau:
firewall-cmd –permanent –add-port=PORT/NAME
Ví dụ mở port 80/tcp cho web ta dùng lệnh sau:
firewall-cmd –permanent –add-port=80/tcp
Sau đó reload lại firewall là được:
firewall-cmd –reload
Tham khảo một số port khác:
[root@mail ~]# firewall-cmd –permanent –add-port=161/udp
[root@mail ~]# firewall-cmd –permanent –add-port=25/tcp
[root@mail ~]# firewall-cmd –permanent –add-port=2220/tcp
[root@mail ~]# firewall-cmd –permanent –add-port=80/tcp
[root@mail ~]# firewall-cmd –permanent –add-port=110/tcp
[root@mail ~]# firewall-cmd –permanent –add-port=143/tcp
[root@mail ~]# firewall-cmd –permanent –add-port=389/tcp
[root@mail ~]# firewall-cmd –permanent –add-port=443/tcp
[root@mail ~]# firewall-cmd –permanent –add-port=587/tcp
[root@mail ~]# firewall-cmd –permanent –add-port=465/tcp
[root@mail ~]# firewall-cmd –permanent –add-port=993/tcp
[root@mail ~]# firewall-cmd –permanent –add-port=995/tcp
[root@mail ~]# firewall-cmd –permanent –add-port=7071/tcp
[root@mail ~]# firewall-cmd –permanent –add-port=7780/tcp