topic Re: Management Interface x Data Interfaces in Network Security

Management Interface x Data Interfaces

Otvforte — Tue, 08 Jul 2025 18:36:04 GMT

Hello,

I understood that connections to the FTD itself, cannot be filtered using FDM ACE only.

So, I'm looking for the right option where I can ensure that the connections to manage FTD (web/ssh) are disable and not exposed to the internet (default).

Cisco documentation mentions these two options, but I couldn't understand exactly the difference: Management Interface and Management Data.

Thank you

Re: Management Interface x Data Interfaces

Rob Ingram — Tue, 08 Jul 2025 18:40:10 GMT

@Otvforte the management interface is optional (you don't need to use it), is dedicated for management purposes, usually connected to the internal LAN.

The data interfaces are the inside, outside or dmz etc, typically you would not enable mgmt services (ssh, https) on the outside or dmz interfaces. If you do enable management services on the outside interface, restrict this to known hosts.

Re: Management Interface x Data Interfaces

MHM Cisco World — Tue, 08 Jul 2025 18:45:26 GMT

https://www.cisco.com/c/en/us/support/docs/security/secure-firewall-threat-defense/222872-configure-management-access-for-ssh-and.html

this guide for SSH/HTTP access to FTD

mgmt interface use for FMC and FDM
data interface use mostly for FDM

MHM

Re: Management Interface x Data Interfaces

Otvforte — Tue, 08 Jul 2025 18:55:27 GMT

I see, so Management Access / Management Interface option is about that one exclusive for management purposes:

Thank you for this clarification

Re: Management Interface x Data Interfaces

MHM Cisco World — Tue, 08 Jul 2025 18:56:17 GMT

Correct
you access FTD via mgmt interface so select it to harden your FTD

MHM

Re: Management Interface x Data Interfaces

Rob Ingram — Tue, 08 Jul 2025 18:53:36 GMT

@Otvforte not quite. the "Management Access" section relates to the management and data interfaces. You would select the correct tab - "Management Interface" or "Data Interface", then configured required access on the specific interface.

https://www.cisco.com/c/en/us/td/docs/security/firepower/770/fdm/fptd-fdm-config-guide-770/fptd-fdm-system.html#concept_6FFA959431C84299B9EDCF19160266AD

Re: Management Interface x Data Interfaces

Otvforte — Tue, 08 Jul 2025 18:58:27 GMT

My mistake, I wrote Management Access / Management Access, it should be Management Access / Management Interface. Thank you.

Re: Management Interface x Data Interfaces

MHM Cisco World — Tue, 08 Jul 2025 19:13:02 GMT

https://youtu.be/-bS8-iwhyMc?si=XvP9m93AuJVMDoa4

This how we can mgmt ftd from data interface instead of mgmt interface.

But I must mention it local mgmt fdm so I dont prefer you use data interface at all.

Use for local mgmt mgmt interface.

Anyway this for your info

BUT cor FMC data interface is better

MHM