MULTIPLE ADDRESSES ON THE EXTERNAL INTERFACE IP
Hi all
We put in place a number of ASAs for use with corporate VPN. When remote users connect using anyconnect they can hairpin on the Internet from Headquarters and must assign a public IP address for this purpose. To avoid people getting the same public address every time they go to the internet, we want to set up a pool of public addresses which will be awarded at random to the user of the VPN. Also, for their incoming connection requests, we have a ddns that solves a unique ip address for incoming connections. So, in summary clients connect to a single IP address on our ASAs, then hairpin at the internet and receive a public IP address from a pool. Look at us a few options to do so, but would appreciate any suggestions as to how best to achieve this goal.
Thank you
Hello
It seems to me that the order of the chosen one NAT IP address of the NAT pool is random. I tested on my home with a pool of public addresses small ASA5505.
I don't know if there is difference between different levels of Software ASA or rather the NAT configuration format. Since the 8.2 (and below) and 8.3 format (and more recent) is completely different.
If we guess you configure NAT pool for VPN Client users connected to the ASA then configurations need you so
Software of 8.3 and above
permit same-security-traffic intra-interface
object-group, network VPN-POOL
Description the user VPN address Pools
object-network 10.10.10.0 255.255.255.128
object-network 10.10.20.0 255.255.255.128
network of the PUBLIC-POOL object
1.1.1.1 range 1.1.1.254
interface of VPN-POOL PUBLIC POOL dynamic NAT (outside, outside) after auto source
8.2 software and below
permit same-security-traffic intra-interface
NAT (outside) 200 10.10.10.0 255.255.255.0
NAT (outside) 200 10.10.20.0 255.255.255.0
Global 1.1.1.1 - 1.1.1.254 200 (outside)
Global 200 (external) interface
I don't know what is the amount of your user, but I guess you don't such a pool of important public addresses for users. The configurations above also contain a dynamic PAT when the NAT pool runs out.
Is that what you're looking for?
Hope this helps
-Jouni
Tags: Cisco Security
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