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Dynamic DSL PIX Configuration

Posted on 2004-08-05
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Last Modified: 2013-11-16
Hello,

I have a remote office using a DSL provider that only offers dynamic ip configuration and not static.

I would like to put a pix 506e in this office.  Is it possible to configure the pix using dynamic dsl and if so where can I find a configuration example?

Or, must I find an ISP that provides a static ip range?

Thank you
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Question by:jimm123
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grblades earned 200 total points
ID: 11729072
Hi jimm123,
Yes you can use it with DSL. I have a configuration example on my website.
http://www.gbnetwork.co.uk/networking/ciscopixhomedsl.html
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by:jimm123
ID: 11729344
grblades,

Thank you.  I actually found your document earlier.  I do have some questions.

With this type of setup is it still possible to build vpn tunnels between this pix and a pix in another office?

Also, when using dyndns is it possible to assign a dns name to the dynamically assigned ip address issued by the isp to the pix?
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by:grblades
ID: 11729419
Yes you can still configure a VPN tunnel between two pix's BUT because you have to configure the IP address of the peer PIX you have to reconfigure the PIX every time the other PIX changes its IP address.

Yes you can. Most dyndns clients will discover the IP address the PIX has by contacting a webserver which then tells them what IP address they connected via.
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by:jimm123
ID: 11729602
Sounds complicated.  I am going to find a static ip solution.  That appeasr to be the most optimal option.
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by:grblades
ID: 11730269
Another alternative is if the remote office has a dynamic IP address and you wont ever need to establish a VPN to them (they always establish it from their end) then you could configure their PIX as a easyvpn client.

Here is an example:-
http://www.cisco.com/en/US/products/hw/vpndevc/ps2030/products_configuration_example09186a008019e6d7.shtml
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