I am hosting special HTTP and HTTPS services on the ports 8006 and 8007 respectively. 我分别在端口8006和8007上托管特殊的HTTP和HTTPS服务。 I use iptables to "activate" the server; 我用iptables来“激活”服务器; ie to route the incoming HTTP and HTTPS ports: 即路由传入的HTTP和HTTPS端口:
iptables -A INPUT -i eth0 -p tcp --dport 80 -j ACCEPT
iptables -A INPUT -i eth0 -p tcp --dport 443 -j ACCEPT
iptables -A INPUT -i eth0 -p tcp --dport 8006 -j ACCEPT
iptables -A INPUT -i eth0 -p tcp --dport 8007 -j ACCEPT
iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 8006
iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 443 -j REDIRECT --to-port 8007
iptables -A OUTPUT -t nat -d 127.0.0.1 -p tcp --dport 80 -j REDIRECT --to-ports 8006
iptables -A OUTPUT -t nat -d 127.0.0.1 -p tcp --dport 443 -j REDIRECT --to-ports 8007
This works like a charm. 这就像一个魅力。 However I would like to create another script that disables my server again; 但是,我想创建另一个脚本,再次禁用我的服务器; ie restore iptables to the state it was in before running the lines above. 即在运行上面的行之前将iptables恢复到它所处的状态。 However I am having a hard time figuring out the syntax to remove these rules. 但是,我很难找出删除这些规则的语法。 The only thing that seems to work is a complete flush: 似乎唯一有效的是完全冲洗:
iptables -F
iptables -X
iptables -t nat -F
iptables -t nat -X
iptables -t mangle -F
iptables -t mangle -X
iptables -P INPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -P OUTPUT ACCEPT
But that will also delete other iptables rules which is undesired. 但这也将删除其他不受欢迎的iptables规则。
#1楼
参考:https://stackoom.com/question/gmoH/如何从iptables中删除特定规则
#2楼
Execute the same commands but replace the "-A" with "-D". 执行相同的命令,但将“-A”替换为“-D”。 For example: 例如:
iptables -A ...
becomes 变
iptables -D ...
#3楼
You may also use the rule's number ( --line-numbers ): 您也可以使用规则的编号( - line-numbers ):
iptables -L INPUT --line-numbers
Example output : 示例输出:
Chain INPUT (policy ACCEPT)
num target prot opt source destination
1 ACCEPT udp -- anywhere anywhere udp dpt:domain
2 ACCEPT tcp -- anywhere anywhere tcp dpt:domain
3 ACCEPT udp -- anywhere anywhere udp dpt:bootps
4 ACCEPT tcp -- anywhere anywhere tcp dpt:bootps
So if you would like to delete second rule : 所以,如果你想删除第二条规则:
iptables -D INPUT 2
Update 更新
If you use(d) a specific table (eg nat), you have to add it to the delete command (thx to @ThorSummoner for the comment) 如果你使用(d)一个特定的表(例如nat),你必须将它添加到删除命令(thx到@ThorSummoner的评论)
sudo iptables -t nat -D PREROUTING 1
#4楼
The best solution that works for me without any problems looks this way: 对我来说没有任何问题的最佳解决方案就是这样的:
1. Add temporary rule with some comment: 1.添加一些评论的临时规则:
comment=$(cat /proc/sys/kernel/random/uuid | sed 's/\-//g')
iptables -A ..... -m comment --comment "${comment}" -j REQUIRED_ACTION
2. When the rule added and you wish to remove it (or everything with this comment), do: 2.当规则添加并且您希望删除它(或带有此注释的所有内容)时,请执行以下操作:
iptables-save | grep -v "${comment}" | iptables-restore
So, you'll 100% delete all rules that match the $comment and leave other lines untouched. 因此,您将100%删除与$ comment匹配的所有规则,并保持其他行不变。 This solution works for last 2 months with about 100 changes of rules per day - no issues.Hope, it helps 这个解决方案在过去的2个月里工作,每天约100次规则变更 - 没有问题。希望,这有帮助
#5楼
First list all iptables rules with this command: 首先使用以下命令列出所有iptables规则:
iptables -S
it lists like: 它列出如下:
-A XYZ -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
Then copy the desired line, and just replace -A
with -D
to delete that: 然后复制所需的行,只需将-A
替换为-D
即可删除:
iptables -D XYZ -p ...
#6楼
Use -D
command, this is how man
page explains it: 使用-D
命令,这是man
页解释它的方式:
-D, --delete chain rule-specification
-D, --delete chain rulenum
Delete one or more rules from the selected chain.
There are two versions of this command:
the rule can be specified as a number in the chain (starting at 1 for the first rule) or a rule to match.
Do realize this command, like all other command( -A
, -I
) works on certain table. 像所有其他命令( -A
, -I
)一样在某些表上实现此命令。 If you'are not working on the default table( filter
table), use -t TABLENAME
to specify that target table. 如果您没有使用默认表( filter
表),请使用-t TABLENAME
指定该目标表。
Delete a rule to match 删除要匹配的规则
iptables -D INPUT -i eth0 -p tcp --dport 443 -j ACCEPT
Note: This only deletes the first rule matched. 注意:这仅删除匹配的第一个规则。 If you have many rules matched(this can happen in iptables), run this several times. 如果您有许多匹配的规则(这可能发生在iptables中),请多次运行。
Delete a rule specified as a number 删除指定为数字的规则
iptables -D INPUT 2
Other than counting the number you can list the line-number with --line-number
parameter, for example: 除了计算数字,您可以使用--line-number
参数列出行--line-number
,例如:
iptables -t nat -nL --line-number