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Cisco ASA 5505; how to change DHCP to static ip on outside interface?

Last Modified: 2012-05-12
Hi Experts,

I'm encountering an issue on my test Cisco ASA 5505 and would like to 'hear' you opinion.

My ASA is using DHCP (client) on the outside interface and is DHCP server on the inside. I want to change the outside DHCP to static IP. But when I change that, there is no network traffic possible between the computers and the internet.

What I've done:
- In ADSM (version 6.4, ASA version 8.4) I changed the outside IP in the "interfaces" pane.
- In "DHCP Server" settings I added the DNS servers of my ISP to the list.
- Added the same DNS servers in the "DNS Client" pane.
- Saved it to RAM of the ASA (not the flash memory)

After doing this the computers connected to the ASA (Macs) can't access the internet. When I give the ASA the reload command, things work fine again, but that's with DHCP on the outside interface, not static.

So, what am I doing wrong? Do I need to add a static route? If so, how do I do that?

I found in this answer in the Knowledgebase, but the solution there doesn't work in my case

Yes, I'm a bit of a newbie with these devices... but I hope you like the points ;-)
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