endian firewall tutorial

Use IPFW before Mac 10.10. Then upgrade to Pfctl. Because the Mac comes with a GUI firewall that can only be released for software and cannot be managed for specific ports inbound and outbound. So using PFCTL can solve this kind of problem.The collection tutorials are as follows:Http://man.linuxde.net/pfctlhttps://my.oschina.net/china008/blog/343049Http://blog.chinaunix.net/uid-20674714-id-90862.htmlhttps://cn2.chionlab.moe/2016/02/01/use-pf-on-osx/Ht

number 8 in input, execute:iptables-d INPUT 86, iptables boot and rule savingCentOS may exist after installing the iptables, Iptables does not boot from the boot, you can execute:Chkconfig--level 345 iptables onAdd it to boot.CentOS can be performed: Service iptables save the rule.It is also important to note that debian/ubuntu on iptables will not save the rules.Need to follow the following steps, so that the network card shutdown is to save iptables rules, start loading iptables rules:Create

, iptables boot and rule savingCentOS may exist after installing the iptables, Iptables does not boot from the boot, you can execute:Chkconfig--level 345 iptables onAdd it to boot.CentOS can be performed: Service iptables save the rule.It is also important to note that debian/ubuntu on iptables will not save the rules.Need to follow the following steps, so that the network card shutdown is to save iptables rules, start loading iptables rules:Create the/etc/network/if-post-down.d/iptables file an

A few days ago the micro-demon tribe was once again subjected to attacks by individual ulterior motives, by the way to recharge their own electricity, a review of the common Linux firewall iptables some of the content, but helpless online many of the tutorials are more cumbersome, in the concise learning purposes, the micro-demon for everyone to eliminate a lot of redundant content, Extract as many of the best part of the written, and common learning,

card shutdown is to save iptables rules, start loading iptables rules:Create the/etc/network/if-post-down.d/iptables file and add the following:#!/bin/bashIptables-save >/etc/iptables.rulesExecute: chmod x/etc/network/if-post-down.d/iptables Add execute permissions.Create the/etc/network/if-pre-up.d/iptables file and add the following:#!/bin/bashIptables-restore Execute: chmod x/etc/network/if-pre-up.d/iptables Add execute permissions.More information on how to use iptables can be performed: Ip