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New Member

Multiple External IP Addresses

I'm new to the world of cisco. (asa 5510).

I have a rack at a data center that has multiple IP addresses - 254.16.220.1 thru 254.16.220.62 (obviously not the acutal addresses.)

I need to integrate it slowly into my rack, pulling one server behind it at a time.

How do i configure a single ethernet port to respond to multiple ip addresses?

For example - today i would like the external interface to answer to 254.16.220.10 and tomorrow i'd like to add in 254.16.220.15, the the next day 254.16.220.55, and so on.

Suggesstions????

THANKS!

1 REPLY
New Member

Re: Multiple External IP Addresses

You can only assign one IP address per ASA interface. However, you can create static NAT translations to have the firewall ARP for several IPs.

For example you have the interface with IP address 254.16.220.10, you want to NAT the 254.16.220.15 to an inside server with address 10.1.1.15. You can use the static command as follows:

static (inside,outside) 254.16.220.15 10.1.1.15 netmask 255.255.255.255

This will create the static NAT translation and all packets for 254.16.220.15 will be sent to 10.1.1.15 as long as they are permitted on the outside access list. Below you will find the command reference link that has some examples:

http://www.cisco.com/en/US/docs/security/asa/asa72/command/reference/s8_72.html#wp1202525

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