Cisco Firewall/VPN recomendation

Hi, my companies ISP manages all packets that are sent in/out of our network using a router and firewall which they have configured and manage themselves.

We have decided to manage all our packets ourselves, so that our ISP sends all packets to us and we decide what happens to them.

I have been looking at some cisco products.
What we are mainly concerned about is security and we need VPN.

1. Would a Cisco PIX Firewall do the job.
2. Do i need a router (Im pretty sure I do)
3. Can I configure VPN using the PIX firewall or do I configure this in a router only.
4. Are the Cisco Routers with built-in firewalls anygood eg CISCO1720-VPN-M/K9.

Any other suggestions that may be helpfull would greatly be appreciated.

Apologies for the amount of points for this question, it should have more. I have the max that I have left :)

Thanks in advance
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anil_uAsked:
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chicagoanConnect With a Mentor Commented:
>1. Would a Cisco PIX Firewall do the job.
Undoubtedly, although a log analysis tool would be a crucial component.

>2. Do i need a router (Im pretty sure I do)
I'm pretty sure you do, too.

>3. Can I configure VPN using the PIX firewall or do I configure this in a router only.
Yes, the PIX would be preferable asb a VPN endpoint for clients; a fix site-to-site via your router would be OK though.

>4. Are the Cisco Routers with built-in firewalls anygood eg CISCO1720-VPN-M/K9.
It's better than nothing, routers are good at packet filtering, firewalls are better at statefull inspection - a combination is optimal.
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anil_uAuthor Commented:
hi chicagoan, thanks for your extremly quick responce :)

regarding question 4, I have seen the word stateful used when looking up these cisco product, what exactly does that mean?  configurable maybe
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anil_uAuthor Commented:
Thanks found it on the net

Incase anyone else is interested

Stateful inspection firewalls determine whether packets can get through the firewall based on the protocol, port, and source and destination addresses. For every request that is allowed by the strategy, stateful inspection firewalls open up a limited time window to allow response packets, but ONLY from the same host. Also, by maintaining information about previous packets, stateful inspection firewalls can quickly verify that packets meet the criteria for authorized traffic. This makes them inherently fast.
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