<div>
Ok, thanks for the info. However, I got few more quesitons. Can packet filtering be considered as an IDS system? If not, can it be configured into one? What is the difference in the way they filter? Which one is more reliable?
</div>


Ok, thanks for the info. However, I got few more quesitons. Can packet filtering be considered as an IDS system? If not, can it be configured into one? What is the difference in the way they filter? Which one is more reliable?

<div>
thanks for the detailed explanations.
</div>


<div>
<div class="content wysiwyg-content">
Hello Experts, <br />
<br />
I am kinda confused with some terms. Please clarify the following:<br />
<br />
stateless packet filtering VS stateful packet filtering<br />
<br />
and <br />
<br />
NAT VS PAT<br />
<br />
Thanks for all your help<br />

</div>
</div>


Hello Experts, 

I am kinda confused with some terms. Please clarify the following:

stateless packet filtering VS stateful packet filtering

and 

NAT VS PAT

Thanks for all your help


Network Security

Software firewalls, also known as host-based firewalls, provide a layer of software on one host that controls network traffic in and out of that single machine. Most operating systems now include firewall software, but many available software firewalls include central distribution, antivirus systems and disaster recovery.

Software Firewalls

Security is the protection of information systems from theft or damage to the hardware, the software, and the information on them, as well as from disruption or misdirection of the services they provide. The main goal of security is protecting assets, and an asset is anything of value and worthy of protection.  Information Security is a discipline of protecting information assets from threats through safeguards to achieve the objectives of confidentiality, integrity, and availability or CIA for short. On the other hand, disclosure, alteration, and disruption (DAD) compromise the security objectives.

Security

Cisco PIX is a dedicated hardware firewall appliance; the Cisco Adaptive Security Appliance (ASA) is a firewall and anti-malware security appliance that provides unified threat management and protection the PIX does not. Other Cisco devices and systems include routers, switches, storage networking, wireless and the software and hardware for PIX Firewall Manager (PFM), PIX Device Manager (PDM) and Adaptive Security Device Manager (ASDM).