linux打开端口

客户那边有台服务器同一个局域网中都无法访问，排除lamp环境问题，发现时服务器中的防火墙没有开启80端口。于是去网上搜索了一下，在脚本之家看到一种添加代码的方法

代码如下	复制代码
vi /etc/sysconfig/iptables -A INPUT -m state –state NEW -m tcp -p tcp –dport 80 -j ACCEPT（允许80端口通过防火墙）  -A INPUT -m state –state NEW -m tcp -p tcp –dport 3306 -j ACCEPT（允许3306端口通过防火墙）

按照这种方法测试，发现重启防火墙的时候，回报这两行错误。

[root@localhost ~]# /etc/init.d/iptables restart 
iptables：清除防火墙规则：                                 [确定]
iptables：将链设置为政策 ACCEPT：filter                    [确定]
iptables：正在卸载模块：                                   [确定]
iptables：应用防火墙规则：Bad argument `–-state'
Error occurred at line: 11
Try `iptables-restore -h' or 'iptables-restore --help' for more information.
                                                           [失败]

发现这种方法并不好使，于是尝试另外一种，通过命令去添加端口的方法。

代码如下	复制代码
[root@centos httpd]# /sbin/iptables -I INPUT -p tcp --dport 80 -j ACCEPT [root@centos httpd]# /etc/rc.d/init.d/iptables save [root@centos httpd]# /etc/init.d/iptables restart

这样就搞定了，查看效果

代码如下	复制代码
[root@centos httpd]# /etc/init.d/iptables status

Linux下启动apache报错：80端口已占用解决办法

apache启动报错(98)Address already in use: make_sock: could not bind to address [::]:80
# /etc/init.d/httpd start
Starting httpd: (98)Address already in use: make_sock: could not bind to address [::]:80
(98)Address already in use: make_sock: could not bind to address 0.0.0.0:80
no listening sockets available, shutting down
Unable to open logs
[FAILED]

代码如下

复制代码

1.netstat -lnp|grep 80 tcp        0      0 192.168.180.68:61027        0.0.0.0:*                   LISTEN      6289/oproxyd         tcp        0      0 :::80                       :::*                        LISTEN      846/httpd            tcp        0      0 ::ffff:192.168.180.68:7001 :::*                        LISTEN      32015/java          找到pid 846 #ps 846 查看 #kill -9 846 杀掉 #./apachectl start

启动成功

*****************************************************************************
处理办法:

代码如下

复制代码

# ps -aux | grep http Warning: bad syntax, perhaps a bogus '-'? See /usr/share/doc/procps-3.2.7/FAQ root     12079 0.0 0.0 61164   720 pts/1    S+   16:06   0:00 grep http # ps -aux | grep apache Warning: bad syntax, perhaps a bogus '-'? See /usr/share/doc/procps-3.2.7/FAQ apache   10820 0.0 0.0   2044   600 ?        Ss   Jan01   0:04 bash root     12081 0.0 0.0 61160   716 pts/1    S+   16:06   0:00 grep apache # kill -9 10820 # /etc/init.d/httpd start Starting httpd:                                            [ OK ] # /etc/init.d/httpd restart Stopping httpd:                                            [ OK ]