iptables只允许指定ip地址访问指定端口 首先,清除所有预设置 其次,设置只允许指定ip地址访问指定端口上面这两条,请注意--dport为目标端口,当数据从外部进入服务器为目标端口;反之,数据从服务器出去则为数据源端口,使用 --sport同理,-s是指定源地址,-d是指定目标地址。 然后,关闭所有的端口最后,保存当前规则 这种ip...
"iptables -t filter -A INPUT -p tcp --dport 22 -s 172.25.254.83 -j ACCEPT"。往filter表中添加规则,不允许172.25.254.83通过ssh远程连接。这个操作是临时修改,只重启iptables服务,又会恢复最开始的样子。 也可以不加"-t"参数,即"iptables -A INPUT -p tcp --dport 22 -s 172.25.254.83 -j ACCEPT...
If you are using a VPN client on this host to create the second interface, don't forget to alsoallow connections to the VPN server, otherwise your local ip10.147.18.192won't be reachable anymore. You'll need to at least allow outbound and inbound traffic to/from the VPN server on inter...
sudo iptables -A INPUT -p tcp --dport 80 -j ACCEPT # -A INPUT: 追加到 INPUT链 # -p tcp: 指定协议为 TCP # --dport 80: 指定目标端口为80 # -j ACCEPT: 接受数据包 阻止来自指定IP的流量 sudo iptables -A INPUT -s 192.168.1.100 -j DROP # -s 192.168.1.100: 指定源IP地址 允许来自...
iptables-t nat-APOSTROUTING-d192.168.1.11-p tcp--dport88-jSNAT--to-source122.9.3.47:88#-j:值为SNAT需要静态指定修改后的值,值为MASQUERADE表示动态修改源地址为出口网卡地址 #--to-source:将数据包的源地址转换成指定值 # 整条命令解释:将发给192.168.1.11:88的数据包,其源地址改为122.9.3.47 ...
By defaulting to the accept rule, you can then use iptables to deny specific IP addresses or port numbers, while continuing to accept all other connections. We’ll get to those commands in a minute. If you would rather deny all connections and manually specify which ones you want to allow...
The third and fourth ways allow the specification of a group of IP addresses, such as `199.95.207.0/24? or `199.95.207.0/255.255.255.0?. These both specify any IP address from 199.95.207.0 to 199.95.207.255 inclusive; the digits after the `/ tell which parts of the IP address are signif...
allow related incoming iptables -I INPUT 1 -m state --state ESTABLISHED,RELATED -j ACCEPT ### # programs and stuff (add a line for each service you want to allow) # SSH on local network iptables -A INPUT -s $CLASS_A -p tcp --destination-port 22 -j ACCEPT # apache server (on a...
This becomes useful if there is a program that wants to gain an outbound connection to a specific address, but you don't want to allow the connection. In this specific example Windows uses this IP incorrectly as a broadcast address (search Google for more info). While viewing your router ...
iptables 是 Linux 防火墙工作在用户空间的管理工具,是 netfilter/iptablesIP 信息包过滤系统是一部分,用来设置、维护和检查 Linux 内核的 IP 数据包过滤规则。 iptables:基于命令行的防火墙策略管理工具 iptables属于OSI七层模型中数据链路层的服务,可以根据流量的源地址、目的地址、传输协议、服务类型等信息进行匹配,一旦...