iptables 开启3306端口

[root@mysqld ~]# mysql -uroot -h 192.168.1.35 -p
Enter password:
ERROR 1130 (HY000): Host '192.168.1.66' is not allowed to connect to this MySQL server

下表可见3306端口没打开:

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[root@v01-svn-test-server online]# service iptables status
Table: filter
Chain INPUT (policy ACCEPT)
num  target     prot opt source               destination        
1    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:22
2    ACCEPT     all  --  127.0.0.1            127.0.0.1          
3    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:80
 
Chain FORWARD (policy ACCEPT)
num  target     prot opt source               destination        
 
Chain OUTPUT (policy ACCEPT)
num  target     prot opt source               destination        
1    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp spt:22 state ESTABLISHED
2    ACCEPT     all  --  127.0.0.1            0.0.0.0/0          
3    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp spt:80 state ESTABLISHED

 

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[root@v01-svn-test-server online]# iptables -A INPUT -p tcp -s 192.168.1.66 --dport 3306 -j ACCEPT
[root@v01-svn-test-server online]# service iptables status
Table: filter
Chain INPUT (policy ACCEPT)
num  target     prot opt source               destination        
1    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:22
2    ACCEPT     all  --  127.0.0.1            127.0.0.1          
3    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:80
4    ACCEPT     tcp  --  192.168.1.66         0.0.0.0/0           tcp dpt:3306
 
Chain FORWARD (policy ACCEPT)
num  target     prot opt source               destination        
 
Chain OUTPUT (policy ACCEPT)
num  target     prot opt source               destination        
1    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp spt:22 state ESTABLISHED
2    ACCEPT     all  --  127.0.0.1            0.0.0.0/0          
3    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp spt:80 state ESTABLISHED

 建个远程账户：

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mysql> select user,host,password from user;
+------+-----------+-------------------------------------------+
| user | host      | password                                  |
+------+-----------+-------------------------------------------+
| root | localhost | *23AE809DDACAF96AF0FD78ED04B6A265E05AA257 |
+------+-----------+-------------------------------------------+
1 row in set (0.06 sec)

 

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mysql> grant select on *.* to "select_user"@"%" identified by "123";
Query OK, 0 rows affected (0.10 sec)

 

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mysql> select user,host,password from user;
+-------------+-----------+-------------------------------------------+
| user        | host      | password                                  |
+-------------+-----------+-------------------------------------------+
| root        | localhost | *23AE809DDACAF96AF0FD78ED04B6A265E05AA257 |
| select_user | %         | *23AE809DDACAF96AF0FD78ED04B6A265E05AA257 |
+-------------+-----------+-------------------------------------------+
2 rows in set (0.00 sec)

 成功连入远程连入mysql服务器:

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[root@mysqld ~]# mysql -uselect_user -h192.168.1.35 -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 13
Server version: 5.5.40-log MySQL Community Server (GPL)
 
Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.
 
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
 
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
 
mysql>

 关掉3306端口，再次测试:

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[root@v01-svn-test-server online]# iptables -D INPUT -p tcp -s 192.168.1.66 --dport 3306 -j ACCEPT
[root@v01-svn-test-server online]# service iptables status
Table: filter
Chain INPUT (policy ACCEPT)
num  target     prot opt source               destination        
1    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:22
2    ACCEPT     all  --  127.0.0.1            127.0.0.1          
3    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:80
 
Chain FORWARD (policy ACCEPT)
num  target     prot opt source               destination        
 
Chain OUTPUT (policy ACCEPT)
num  target     prot opt source               destination        
1    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp spt:22 state ESTABLISHED
2    ACCEPT     all  --  127.0.0.1            0.0.0.0/0          
3    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp spt:80 state ESTABLISHED

 

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[root@v01-svn-test-server online]# iptables -P INPUT DROP
[root@v01-svn-test-server online]# iptables -P OUTPUT DROP
[root@v01-svn-test-server online]# iptables -P FORWARD DROP
[root@v01-svn-test-server online]# service iptables status
Table: filter
Chain INPUT (policy DROP)
num  target     prot opt source               destination        
1    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:22
2    ACCEPT     all  --  127.0.0.1            127.0.0.1          
3    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:80
 
Chain FORWARD (policy DROP)
num  target     prot opt source               destination        
 
Chain OUTPUT (policy DROP)
num  target     prot opt source               destination        
1    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp spt:22 state ESTABLISHED
2    ACCEPT     all  --  127.0.0.1            0.0.0.0/0          
3    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp spt:80 state ESTABLISHED

 

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[root@mysqld ~]# mysql -uselect_user -h192.168.1.35 -p
Enter password:
 
#卡主无法链接

 重新开启3306端口:

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[root@v01-svn-test-server online]# service iptables status
Table: filter
Chain INPUT (policy DROP)
num  target     prot opt source               destination        
1    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:3306
2    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:22
3    ACCEPT     all  --  127.0.0.1            127.0.0.1          
4    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:80
 
Chain FORWARD (policy DROP)
num  target     prot opt source               destination        
 
Chain OUTPUT (policy DROP)
num  target     prot opt source               destination        
1    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp spt:3306
2    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp spt:22 state ESTABLISHED
3    ACCEPT     all  --  127.0.0.1            0.0.0.0/0          
4    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp spt:80 state ESTABLISHED
 
[root@v01-svn-test-server online]# cat /etc/sysconfig/ip
ip6tables         ip6tables.old     iptables-config   iptables.save    
ip6tables-config  iptables          iptables.old     
[root@v01-svn-test-server online]# cat /etc/sysconfig/iptables
# Generated by iptables-save v1.4.7 on Wed Jun  1 22:15:41 2016
*filter
:INPUT DROP [24:3081]
:FORWARD DROP [0:0]
:OUTPUT DROP [0:0]
-A INPUT -p tcp -m tcp --dport 3306 -j ACCEPT
-A OUTPUT -p tcp -m tcp --sport 3306 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 22 -j ACCEPT
-A INPUT -s 127.0.0.1/32 -d 127.0.0.1/32 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 80 -j ACCEPT
-A OUTPUT -p tcp -m tcp --sport 22 -m state --state ESTABLISHED -j ACCEPT
-A OUTPUT -s 127.0.0.1/32 -j ACCEPT
-A OUTPUT -p tcp -m tcp --sport 80 -m state --state ESTABLISHED -j ACCEPT
COMMIT
# Completed on Wed Jun  1 22:15:41 2016

 

posted @ 2022-02-20 08:20  疏桐  阅读(937)  评论(0)  编辑  收藏  举报
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