topic Two public external addresses need to talk to one another in Network Security

Two public external addresses need to talk to one another

Shawn Thomas — Tue, 12 Mar 2019 01:17:09 GMT

I have two external address that need to talk to each other.

I know this does NOT require a VPN tunnel to do so and NAT is not needed either.

I need to enable access on the outside interface for a public ip>

(public IP that lives on my ASA <------------------------- > needs to talk to another public ip that lives on the outside of my network)

Any help or suggestions would be appreciated!

Two public external addresses need to talk to one another

Julio Carvajal — Wed, 20 Mar 2013 22:45:52 GMT

Hello Shawn,

So basically a user that is outside the ASA but on the same subnet than the ASA outside interface wants to communicate with a public address that is being used by an internal address via NAT, Rigth?

Two public external addresses need to talk to one another

Shawn Thomas — Wed, 20 Mar 2013 22:48:41 GMT

Well Host B which is not on my network needs to talk to Host A which is on my network.

Both have public ip addresses.

Two public external addresses need to talk to one another

Julio Carvajal — Wed, 20 Mar 2013 23:13:32 GMT

Hello,

Then it should not reach the ASA at all as it's on the outside interface.

Internal subnet -----ASA----Outside subnet------Switch----ISP Modem-------------- Internet-----Other PC

Outside PC

Communication does not need to flow to the ASA if the ISP modem router or whatever device it's there has the right mac address assignment for Outside PC Ip address,

Clear enough? let me know

Regards

Two public external addresses need to talk to one another

Shawn Thomas — Mon, 01 Apr 2013 16:52:42 GMT

Figured it out... I added both external ips via an permit acl to the outside interface.

Thanks for replying.

Two public external addresses need to talk to one another

Julio Carvajal — Mon, 01 Apr 2013 17:14:50 GMT

Hello,

Sure, my pleasure,

Please mark the question as answered so future users can learn from this