ASA-5520 Transparent Mode with NAT

Unanswered Question
Jul 8th, 2008
User Badges:


I have seen that starting with sw version 8.0 it is possible to configure NAT with a firewall in transparent mode.

I have an scenario where the upstream router (internet gateway) is performing NAT. Due to this reason sometimes the router processing rises over 90% and starts refusing connections of my users. The firewall is placed between the router and the Core LAN Switch and I have to used in transparent mode (long history). The question is: Have anybody used this feature in transparent mode? Does it work just like in routed mode? that means using PAT whenever the IP address from the pool are exhausted?

Many thanks for your help.

  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
purohit_810 Tue, 07/08/2008 - 15:47
User Badges:
  • Silver, 250 points or more

Yes, It works perfectly fine. You may create multible NAT table also, 8.0 also supports EIGRP routing prtocol that is adjectly same working normal eigrp works in to router and switch.

Still you can't crate subinterfaces but that you can accomplish by creating VLAN.

Let me know if any more questins.


Dharmesh Purohit


This Discussion