pfsense firewall rules tutorial

/network found in a text file# The text file must has one IP address or network per line################################################################## change the following path/filename to match yoursIp_list_file=/path/to/ip.txt################################################################## Don ' t change anything below unless is a smarty pant!#################################################################Iptables_bin=/sbin/iptables# Get The IP address/network from the file and ignore a

the size of a package exceeds the maximum TCP segment length (MSs (maximum segment size) or MTU (maximum transmission unit), the only way to send this package to the destination is to split the package. Because packet sharding is normal, it can be used for malicious attacks.Because the first part of a fragmented package contains a packet header, if the package fragment function is not available, the package filter cannot detect the additional package fragment. Typical attacks typical attacks in

Basic Application Tutorial of Iptables firewall on Linux1. Install iptables firewall If you do not install iptables , you need to install it first CentOS execution: Yum Install IptablesDebian/ubuntu Execution:Apt-get Install Iptables2. Clear existing iptables rulesIptables-fIptables-xIptables–z3, open the specified portThe-a and -I parameters are added to the en

Reproduced in: http://www.cnblogs.com/vipsoft/archive/2012/05/02/2478847.htmlOpen port: Opens "Windows Firewall" in Control Panel, click "Advanced Settings" on the leftRight-click Inbound rules and choose New Rule from the shortcut menuSelect port in the rule type to create and click the Next buttonEnter the port number you want to turn on, such as "11901" click "Next"Select "Allow Connection" and click "Ne

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,

, 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 th

PHP development cannot violate security rules to filter user input. As the most basic precaution, you need to pay attention to your external submissions and make the first security mechanism to handle the firewall. Rule 1: never trust external data or enter Web application security as the most basic precaution. you need to pay attention to your external submission and make the first security mechanism to pr

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 informatio