Httpd Port

查看 httpd 服務的狀態，enabled (開機啟動)，Active:failed (啟動失敗)。從狀態說明，查到原因是無法啟動在 82 port。

[root@kvm8 ~]# systemctl status httpd.service
× httpd.service - The Apache HTTP Server
     Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; preset: disabled)
     Active: failed (Result: exit-code) since Thu 2025-10-09 13:36:57 CST; 21min ago
 Invocation: 9032bd5315bf4dfc99ab9ee27cfd05d2
       Docs: man:httpd.service(8)
    Process: 800 ExecStart=/usr/sbin/httpd $OPTIONS -DFOREGROUND (code=exited, status=1/FAILURE)
   Main PID: 800 (code=exited, status=1/FAILURE)
     Status: "Reading configuration..."
   Mem peak: 7.6M
        CPU: 123ms

Oct 09 13:36:56 kvm8.deyu.wang systemd[1]: Starting httpd.service - 
The Apache HTTP Server...
Oct 09 13:36:56 kvm8.deyu.wang (httpd)[800]: httpd.service: Referenced 
but unset environment variable evaluates to an empty string: OPTIONS
Oct 09 13:36:57 kvm8.deyu.wang httpd[800]: AH00558: httpd: Could not 
reliably determine the server's fully qualified domain name, 
using kvm8.deyu.wang. Set the 'ServerNam>
Oct 09 13:36:57 kvm8.deyu.wang httpd[800]: (13)Permission denied: AH00072: 
make_sock: could not bind to address [::]:82
Oct 09 13:36:57 kvm8.deyu.wang httpd[800]: (13)Permission denied: AH00072: 
make_sock: could not bind to address 0.0.0.0:82
Oct 09 13:36:57 kvm8.deyu.wang httpd[800]: no listening sockets available, 
shutting down
Oct 09 13:36:57 kvm8.deyu.wang httpd[800]: AH00015: Unable to open logs
Oct 09 13:36:57 kvm8.deyu.wang systemd[1]: httpd.service: Main process exited,
code=exited, status=1/FAILURE
Oct 09 13:36:57 kvm8.deyu.wang systemd[1]: httpd.service: Failed with result
'exit-code'.
Oct 09 13:36:57 kvm8.deyu.wang systemd[1]: Failed to start httpd.service -
The Apache HTTP Server.

查詢 http_port_t，82 port 不是 httpd 程序允許訪問的 port。

[root@kvm8 ~]# semanage port --list | grep http
http_cache_port_t              tcp      8080, 8118, 8123, 10001-10010
http_cache_port_t              udp      3130
http_port_t                    tcp      80, 81, 443, 488, 8008, 8009, 8443, 9000
pegasus_http_port_t            tcp      5988
pegasus_https_port_t           tcp      5989

新增 82 為 httpd 服務允許訪問的埠號。

[root@kvm8 ~]# semanage port --add --type http_port_t --proto tcp 82

再查詢 http_port_t，82 port 已經是 httpd 程序允許訪問的 port。

[root@kvm8 ~]# semanage port --list | grep http
http_cache_port_t              tcp      8080, 8118, 8123, 10001-10010
http_cache_port_t              udp      3130
http_port_t                    tcp      82, 80, 81, 443, 488, 8008, 8009, 8443, 9000
pegasus_http_port_t            tcp      5988
pegasus_https_port_t           tcp      5989

再重新啟動 httpd 服務，成功啟動服務。
```
[root@kvm8 ~]# systemctl restart httpd.service
```

再查看 httpd 服務的狀態，enabled (開機啟動)，Active: active (running)。

[root@kvm8 ~]# systemctl status httpd.service
● httpd.service - The Apache HTTP Server
     Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; preset: disabled)
     Active: active (running) since Thu 2025-10-09 14:04:50 CST; 2min 12s ago
 Invocation: 2b1a669432084054ba07537add6dcdc5
       Docs: man:httpd.service(8)
   Main PID: 1617 (httpd)
     Status: "Total requests: 0; Idle/Busy workers 100/0;Requests/sec: 0; Bytes served/sec:   0 B/sec"
      Tasks: 177 (limit: 10692)
     Memory: 13.1M (peak: 13.3M)
        CPU: 607ms
     CGroup: /system.slice/httpd.service
             ├─1617 /usr/sbin/httpd -DFOREGROUND
             ├─1618 /usr/sbin/httpd -DFOREGROUND
             ├─1619 /usr/sbin/httpd -DFOREGROUND
             ├─1621 /usr/sbin/httpd -DFOREGROUND
             └─1632 /usr/sbin/httpd -DFOREGROUND

Oct 09 14:04:50 kvm8.deyu.wang systemd[1]: Starting httpd.service - 
The Apache HTTP Server...
Oct 09 14:04:50 kvm8.deyu.wang (httpd)[1617]: httpd.service: Referenced 
but unset environment variable evaluates to an empty string: OPTIONS
Oct 09 14:04:50 kvm8.deyu.wang httpd[1617]: Server configured, 
listening on: port 82
Oct 09 14:04:50 kvm8.deyu.wang systemd[1]: Started httpd.service - 
The Apache HTTP Server.