cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
3570
Views
0
Helpful
4
Replies

FTD second IP Address

elopraha1
Level 1
Level 1

I am configuring Cisco FTD 1100. Need to use three IP addresses on outside interface. Is there nay way how to do that?

Thank You

Jaromir

1 Accepted Solution

Accepted Solutions

Then you would only need to NAT the second public IP to the SMTP server.  If the second public IP is not in the same subnet as your FTD outside interface then you need to make sure that your ISP is routing that IP / subnet towards your FTD, then NAT will take care of the rest.  The interface needs to be configured to perform proxy ARP, but this is enabled by default. So, unless you have made changes to this you should be all good to just configure NAT.

In addition you will need to configure access control policy rules to allow traffic to the SMTP server on port tcp/25.

--
Please remember to select a correct answer and rate helpful posts

View solution in original post

4 Replies 4

What will you be using the IPs for?  NAT is one option

--
Please remember to select a correct answer and rate helpful posts

I will use it for SMTP server.

 

Then you would only need to NAT the second public IP to the SMTP server.  If the second public IP is not in the same subnet as your FTD outside interface then you need to make sure that your ISP is routing that IP / subnet towards your FTD, then NAT will take care of the rest.  The interface needs to be configured to perform proxy ARP, but this is enabled by default. So, unless you have made changes to this you should be all good to just configure NAT.

In addition you will need to configure access control policy rules to allow traffic to the SMTP server on port tcp/25.

--
Please remember to select a correct answer and rate helpful posts

Thank You 
it Works. Nat has to be Auto NAT .

Jaromir

Getting Started

Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community:

Review Cisco Networking products for a $25 gift card