前提：已經配置好靜態IP
以防萬一，先安裝好iptables服務（不管你裝沒裝，先執行，免得後面添亂）
[root@localhost ~]# yum install iptables-services
[root@localhost ~]# systemctl mask firewalld.service
[root@localhost ~]# systemctl enable iptables.service
[root@localhost ~]# systemctl enable ip6tables.service
進入iptables配置80端口，因爲nginx默認是由80端口訪問
[root@localhost ~]# vim /etc/sysconfig/iptables
這是配置信息：
Generated by iptables-save v1.4.21 on Fri May 12 21:28:29 2017
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [6:696]
-A INPUT -m state –state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -p tcp -m state –state NEW -m tcp –dport 22 -j ACCEPT
-A INPUT -p tcp -m state –state NEW -m tcp –dport 21 -j ACCEPT（我給vsftpd配置的端口）
-A INPUT -p tcp -m state –state NEW -m tcp –dport 80 -j ACCEPT（給nginx配置的端口，原樣輸入就行了）
-A INPUT -p tcp -m state –state NEW -m tcp –dport 30000:30999 -j ACCEPT
-A INPUT -j REJECT –reject-with icmp-host-prohibited
-A FORWARD -j REJECT –reject-with icmp-host-prohibited
COMMIT
Completed on Fri May 12 21:28:29 2017
然後:wq，保存退出就行了
重啓iptables，配置才生效
[root@localhost ~]# systemctl restart iptables.service
開啓防火牆，不管你開沒有，再開一遍：
[root@localhost ~]# systemctl start firewalld
開啓http訪問
[root@localhost ~]# firewall-cmd –permanent –add-service=http
加入80端口
[root@localhost ~]# firewall-cmd –permanent –zone=trusted –add-port=80/tcp
啓動nginx！！！！（重點來了！！！）
centOS7的nginx啓動與其他的有區別！！！注意：我是裝的nginx1.80，在centOS6.X系列中，是通過
cd /usr/local/nginx/sbin/
./nginx
這兩條命令啓動的。
在Ubuntu中是通過/etc/nginx…..,你會發現你的centOS7裏面，etc下面根本就沒有nginx這個folder！
在centOS7中你會發現這行不通，我們應該這麼啓動：
[root@localhost ~]# /usr/local/nginx/sbin/nginx
如果發現：
nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
nginx: [emerg] still could not bind()
說明80端口被佔用，殺掉這個進程：
[root@localhost ~]# killall -9 nginx
再次啓動nginx：
[root@localhost ~]# /usr/local/nginx/sbin/nginx
查看是否啓動：
[root@localhost ~]# ps aux|grep nginx
輸出：
root 7110 0.0 0.0 24348 752 ? Ss 22:32 0:00 nginx: master process /usr/local/nginx/sbin/nginx
nobody 7111 0.0 0.0 26860 1508 ? S 22:32 0:00 nginx: worker process
root 7114 0.0 0.0 112664 968 pts/0 S+ 22:33 0:00 grep –color=auto nginx
啓動成功！
訪問nginx
在瀏覽器地址欄輸入你的Linux虛擬機的靜態ip，會跳轉到nginx的歡迎頁面。
原文鏈接：原文鏈接