我有一个在Debian服务器上运行的MySQL实例，可以毫无问题地本地连接到它。但是，我无法远程连接到它。当我从命令行尝试此操作时，出现以下错误：

ERROR 2003 (HY000): Can't connect to MySQL server on '<server-ip>' (110)

我已将用户添加为mysql，分别为“ user’@’*’和’user’@’localhost”。该服务器中的skip-
networking设置为false，并且my.cnf中注释了绑定地址。我还尝试使用以下命令在iptables中打开端口3306：

/sbin/iptables -A INPUT -i eth0 -p tcp --destination-port 3306 -j ACCEPT

这是我所有的iptable防火墙规则的清单，我使用iptables -L检索了这些规则：

Chain INPUT (policy DROP)
target     prot opt source               destination         
ACCEPT     all  --  anywhere             anywhere            
REJECT     tcp  --  anywhere             anywhere            tcp dpt:auth reject-with icmp-port-unreachable 
ACCEPT     icmp --  anywhere             anywhere            icmp type 8 code 0 state NEW,RELATED,ESTABLISHED,UNTRACKED 
ACCEPT     all  --  anywhere             anywhere            state RELATED,ESTABLISHED 
ACCEPT     tcp  --  anywhere             anywhere            tcp spts:1024:65535 dpt:ftp state NEW 
ACCEPT     tcp  --  anywhere             anywhere            tcp spts:1024:65535 dpt:ssh state NEW 
ACCEPT     tcp  --  anywhere             anywhere            tcp spts:1024:65535 dpt:www state NEW 
ACCEPT     tcp  --  <my-server>          anywhere            tcp spts:1024:65535 dpt:mysql state NEW 
ACCEPT     tcp  --  anywhere             anywhere            tcp dpts:49152:65534 state NEW 
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:mysql 
LOG        all  --  anywhere             anywhere            limit: avg 5/min burst 5 LOG level debug prefix `iptables denied: ' 
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:mysql 
LOG        tcp  --  anywhere             anywhere            tcp dpt:mysql LOG level debug

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination

有谁知道我应该从这里去哪里？