iptables 开启3306端口

[[email protected] ~]# 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:

[[email protected] 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

[[email protected] online]# iptables -A INPUT -p tcp -s 192.168.1.66 --dport 3306 -j ACCEPT
[[email protected] 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：

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

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

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:

[[email protected] ~]# 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:

[[email protected] online]# iptables -D INPUT -p tcp -s 192.168.1.66 --dport 3306 -j ACCEPT
[[email protected] 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

[[email protected] online]# iptables -P INPUT DROP
[[email protected] online]# iptables -P OUTPUT DROP
[[email protected] online]# iptables -P FORWARD DROP
[[email protected] 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

[[email protected] ~]# mysql -uselect_user -h192.168.1.35 -p
Enter password: 

#卡主无法链接

重新开启3306端口:

[[email protected] 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 

[[email protected] online]# cat /etc/sysconfig/ip
ip6tables         ip6tables.old     iptables-config   iptables.save
ip6tables-config  iptables          iptables.old
[[email protected] 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

时间： 2024-11-10 07:52:31

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