freeware firewall

Introduction and technical features of the latest smart firewalls Firewalls have been widely accepted by users and are becoming a major network security device. Firewalls delineate a range of protection and assume that the firewall is the only exit, and then the firewall decides whether to release or block incoming packets. The traditional firewall has a major th

1. Introduction Firewall technology is an applied security technology based on modern communication network technology and information security technology, which is more and more used in the interconnection environment of private network and public network, especially for Internet network. The rapid development of the Internet, so that the firewall products in a short span of a few years, and soon formed a

to commercial or civil network services. Although Linux is an operating system with a high security factor, as a dynamic and evolving operating system, it still inevitably has such problems. In addition, there are many Linux releases and frequent upgrades. there are still many defects in the market, and Linux applications without security patches are applied to network servers, linux users and managers have varying proficiency in actual operation and management experience, so there are still so

I believe that the computer will know that there is a firewall function, then what is the firewall? What does it do? Today we will unveil the mystery of the firewall. Firewalls are usually used for the following purposes: restricting access to the internal network, filtering out unsafe services and illegal users, preventing intruders from approaching

Windows bulk Add firewall exception port Copy Code code as follows: echo off Cls Set var=30000 Set end=30010 : Continue set/a var+=1 echo Add Port%var% netsh firewall add portopening TCP%var% ftp_data_%var% If%var% LSS%end% Goto Continue Echo Complete Pause The following article features, if the order can be manually added, can also be batch processing VBS JS, su

1.netscreen firewall can make ha? So far NetScreen-100 above models can be done ha,netscreen-50 in the new OS version may also be able to do ha. Does 2.Netscreen support load balancing? At which end? Yes, both trust and DMZ support load balancing. 3.netscreen Firewall support does not support PPPoE dialing? The low-end products of the NetScreen firewall supp

The functionality of Microsoft's Windows Server 2003 firewall is so shabby that many system administrators see it as a chicken, and it has always been a simple, inbound-only, host-based State firewall. And as Windows Server 2008 gets closer to us, its built-in firewall capabilities are dramatically improved. Let's take a look at how this new advanced

With the development of the international interconnection Network, some enterprises have established their own intranet and connected with the Internet through a dedicated line. In order to ensure the security of intranet, it is necessary to use dedicated firewall computer to prevent illegal intrusion. The router firewall can only be used as a filter and cannot hide the internal network structure from the i

Is your firewall reliable? Rogue software and Trojans have begun to "Retreat" from the kernel under the "suppression" of various firewalls and anti-virus software ", the traditional method of checking the relationship between locally opened ports and processes does not apply to illegal network access, and the personal firewall has become an essential software for installation. Currently, the mainstream pers

For the general small and medium-sized enterprises, if you want to security management of the enterprise network, do not have to spend high money to buy professional firewall settings, directly with the operating system itself with the firewall function can meet the general enterprise application, today we come together to explore Windows Server 2008 R2 the powerful features of the system

Linux under the Firewall (firewall) from the birth to the present, the firewall has experienced four stages of development: the first stage: the firewall based on the router, the second stage of the user Firewall tool sets; Phase III: A