iptables 转发端口错误 - 没有该名称的链/目标/匹配

iptables 转发端口错误 - 没有该名称的链/目标/匹配

我正在尝试在我的 Ubuntu 12.04 LTS 服务器上配置 iptables 以将端口 443 转发到 8443。

但是当我运行这个命令时:

sudo iptables -A PREROUTING -p tcp --dport 443 -j REDIRECT --to-ports 8443

我收到以下错误:

iptables: No chain/target/match by that name.

我的 iptables 当前配置:

$ sudo iptables -L

Chain INPUT (policy ACCEPT)
target     prot opt source               destination         
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:https
DROP       tcp  --  anywhere             anywhere             tcp dpt:http

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination 

我遗漏了什么或者做错了什么?

答案1

因为PREROUTING链属于NAT表,而不是FILTER表本身。如果您没有通过-t选项明确提及任何表,则FILTER假定为。

因此,您需要提及表类型-t nat

sudo iptables -t nat -A PREROUTING -p tcp --dport 443 -j REDIRECT --to-ports 8443

请注意,MANGLERAW表也有PREROUTING链,但由于您仅重定向端口,因此您大概正在寻找NAT表。

答案2

PREROUTING 链仅适用于 nat、mangle 和 raw 表。iptables
假定过滤表,因此您必须指定其中一个,例如。iptables -t nat ...

答案3

当我运行 docker 命令时,我收到类似的错误

docker run -d -p 8084:8080 knockdata/zeppelin-highcharts


d9c5d34f500d621585470b0e70b915395fcb6b3437859e0f610dbb58d51faf25
docker: Error response from daemon: driver failed programming external connectivity on endpoint elegant_jang  
(7ca0f5ad689f5443ce7533f66b4a86c34d2dbd9d076bac4812288dd3f6a76698):  
iptables failed: iptables --wait -t nat -A DOCKER -p tcp -d 0/0 --dport 8084 -j DNAT --to-destination 172.17.0.2:8080 
! -i docker0: iptables: No chain/target/match by that name.
(exit status 1).

我可以通过重新安装 docker-engine 来修复它

apt-get remove docker-engine
apt-get install docker-engine

答案4

您可以安装(配置服务器安全和防火墙)并使用以下设置。

nano /etc/csf/csf.conf
SYNFLOOD = "" => SYNFLOOD = "1"
CONNLIMIT = "" => CONNLIMIT = "80;75,443;75,21;50”
PORTFLOOD = "" => PORTFLOOD = "80;tcp;5;250"
SYSLOG = “0” => SYSLOG = "1"
DOCKER = “0” => DOCKER = "1"

nano /etc/csf/csfpost.sh

#!/bin/sh

echo "[DOCKER] Setting up FW rules."

iptables -N DOCKER

iptables -t nat -N DOCKER

iptables -t nat -A PREROUTING -m addrtype --dst-type LOCAL -j DOCKER

iptables -t nat -A OUTPUT ! -d 127.0.0.0/8 -m addrtype --dst-type LOCAL -j DOCKER

# Masquerade outbound connections from containers
iptables -t nat -A POSTROUTING -s 172.17.0.0/16 ! -o docker0 -j MASQUERADE

# Accept established connections to the docker containers
iptables -t filter -N DOCKER
iptables -t filter -A FORWARD -o docker0 -j DOCKER
iptables -t filter -A FORWARD -o docker0 -m conntrack --ctstate RELATED,ESTABLISHED -j 
ACCEPT

# Allow docker containers to communicate with themselves & outside world
iptables -t filter -A FORWARD -i docker0 ! -o docker0 -j ACCEPT
iptables -t filter -A FORWARD -i docker0 -o docker0 -j ACCEPT

echo "[DOCKER] Done."

注意:此配置还可以防止您遭受基本的 DDOS 攻击。

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