nginx首次安装远程无法访问

因为是问题、花时间、所以进行记录一番

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（一）安装环境：虚拟机centos7系统

对于nginx在linux下的安装卸载是装了又卸，卸了又装。远程访问就是访问不了，周五的时候能访问，到后面又不能访问了。其实这里可以有些方法的。

（二）验证nginx是否安装成功

首先根据这篇文章进行安装，使用源的方式安装：

centos7安装nginx

（三）本地机器测试nginx是否能正常启动

所谓的本地机器，就是你安装了nginx软件的那一台机器，输入命令：

curl http://192.168.241.129/

这里的ip地址为你本机的ip地址

然后会有结果：

[root@localhost nginx-1.12.1]# curl http://192.168.241.129/







Welcome to nginx!
If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.

For online documentation and support please refer to
nginx.org.

Commercial support is available at
nginx.com.

Thank you for using nginx.


[root@localhost nginx-1.12.1]# 

以上验证了本地是已经安装成功的了，

但是我们远程访问的时候就是访问不了，一直说拒绝访问，那就是可能真的跟端口，防火墙有关了。

（四）防火墙、端口开启设置

打开80端口：
（1）

vi /etc/sysconfig/iptables

（2）

-A INPUT -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT

如图：

image.png

image.png

（五）远程访问：

image.png

（六）以下是整个成功安装的过程：

[root@localhost nginx-1.12.1]# ip addr
1: lo:  mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: ens33:  mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:ac:77:31 brd ff:ff:ff:ff:ff:ff
    inet 192.168.241.129/24 brd 192.168.241.255 scope global dynamic ens33
       valid_lft 1732sec preferred_lft 1732sec
    inet6 fe80::5afb:ed05:b1f5:5d3a/64 scope link 
       valid_lft forever preferred_lft forever
[root@localhost nginx-1.12.1]# systemctl start firewalld.servic
Failed to start firewalld.servic.service: Unit not found.
[root@localhost nginx-1.12.1]# curl http://192.168.241.129/







Welcome to nginx!
If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.

For online documentation and support please refer to
nginx.org.

Commercial support is available at
nginx.com.

Thank you for using nginx.


[root@localhost nginx-1.12.1]# vi /etc/sysconfig/iptables
[root@localhost nginx-1.12.1]# cd /etc/sysconfig/iptables
bash: cd: /etc/sysconfig/iptables: No such file or directory
[root@localhost nginx-1.12.1]# netstat -anop | grep 80
tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN      2226/nginx: master   off (0.00/0/0)
unix  2      [ ACC ]     STREAM     LISTENING     13780    1/systemd            /run/lvm/lvmpolld.socket
unix  3      [ ]         STREAM     CONNECTED     14680    496/systemd-journal  /run/systemd/journal/stdout
unix  2      [ ]         DGRAM                    104613   48094/su             
unix  3      [ ]         STREAM     CONNECTED     20180    1278/master          
unix  2      [ ]         DGRAM                    19137    1280/qmgr            
[root@localhost nginx-1.12.1]# netstat -anop | grep 80
tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN      2226/nginx: master   off (0.00/0/0)
unix  2      [ ACC ]     STREAM     LISTENING     13780    1/systemd            /run/lvm/lvmpolld.socket
unix  3      [ ]         STREAM     CONNECTED     14680    496/systemd-journal  /run/systemd/journal/stdout
unix  2      [ ]         DGRAM                    104613   48094/su             
unix  3      [ ]         STREAM     CONNECTED     20180    1278/master          
unix  2      [ ]         DGRAM                    19137    1280/qmgr            
[root@localhost nginx-1.12.1]# curl http://192.168.241.129/







Welcome to nginx!
If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.

For online documentation and support please refer to
nginx.org.

Commercial support is available at
nginx.com.

Thank you for using nginx.


[root@localhost nginx-1.12.1]# sudo yum install iptables-services 
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirror.lzu.edu.cn
 * extras: mirrors.cn99.com
 * updates: mirrors.cn99.com
Resolving Dependencies
--> Running transaction check
---> Package iptables-services.x86_64 0:1.4.21-24.1.el7_5 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

================================================================================================================
 Package                        Arch                Version                          Repository            Size
================================================================================================================
Installing:
 iptables-services              x86_64              1.4.21-24.1.el7_5                updates               51 k

Transaction Summary
================================================================================================================
Install  1 Package

Total download size: 51 k
Installed size: 25 k
Is this ok [y/d/N]: y
Downloading packages:
iptables-services-1.4.21-24.1.el7_5.x86_64.rpm                                           |  51 kB  00:00:00     
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : iptables-services-1.4.21-24.1.el7_5.x86_64                                                   1/1 
  Verifying  : iptables-services-1.4.21-24.1.el7_5.x86_64                                                   1/1 

Installed:
  iptables-services.x86_64 0:1.4.21-24.1.el7_5                                                                  

Complete!
[root@localhost nginx-1.12.1]# vi /etc/sysconfig/iptables 
[root@localhost nginx-1.12.1]# systemctl stop firewalld
[root@localhost nginx-1.12.1]# systemctl stop iptalbes
Failed to stop iptalbes.service: Unit iptalbes.service not loaded.
[root@localhost nginx-1.12.1]# vi /etc/selinux/config 
[root@localhost nginx-1.12.1]# curl http://192.168.241.129/







Welcome to nginx!
If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.

For online documentation and support please refer to
nginx.org.

Commercial support is available at
nginx.com.

Thank you for using nginx.


[root@localhost nginx-1.12.1]# 

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