topic Re: Gateway cannot be reached through port G0/0 named "outside&qu in Network Security

Gateway cannot be reached through port G0/0 named "outside"

Moiky — Tue, 19 Dec 2023 09:09:50 GMT

Hi,

I am setting up FTDv. I already have internet access (can ping 8.8.8.8 and tools.cisco.com). But on my FDM, it says
"Gateway cannot be reached through port GigabitEthernet0/0 named "outside".

have to cover Public IP for security.

Re: Gateway cannot be reached through port G0/0 named "outside&qu

MHM Cisco World — Tue, 19 Dec 2023 09:23:49 GMT

This message appear when mgmt interface config without GW.

Remember the mgmt and data Routing table is separate' so mgmt need gw and link to any data interface or direct to internet.

MHM

Re: Gateway cannot be reached through port G0/0 named "outside&qu

Moiky — Tue, 19 Dec 2023 09:40:28 GMT

There's already a GW for the management interface..

Re: Gateway cannot be reached through port G0/0 named "outside&qu

Moiky — Tue, 19 Dec 2023 09:42:17 GMT

Also, do i need to set the management interface to a different subnet? since it belongs to the Subnet of my inside network.

Re: Gateway cannot be reached through port G0/0 named "outside&qu

MHM Cisco World — Tue, 19 Dec 2023 09:44:51 GMT

so there is GW 192.168.45.1 inside interface.
and this inside interface is correct config and dont use DHCP server.
last point is ping form this interface to 8.8.8.8 and check if you get response or not.

MHM

Re: Gateway cannot be reached through port G0/0 named "outside&qu

MHM Cisco World — Tue, 19 Dec 2023 09:46:45 GMT

sorry you use .45.0/24 only for mgmt or it use for other Data client ?

Re: Gateway cannot be reached through port G0/0 named "outside&qu

Moiky — Tue, 19 Dec 2023 09:49:10 GMT

I used .45.0/24 on both. (mgmt and data/inside)

Re: Gateway cannot be reached through port G0/0 named "outside&qu

MHM Cisco World — Tue, 19 Dec 2023 09:51:04 GMT

Yes I know that this inside interface you config it as GW for your Mgmt interface,
my Q are you use .45.0/24 in other data interface or only on this data interface (GW of mgmt)?

Re: Gateway cannot be reached through port G0/0 named "outside&qu

Moiky — Tue, 19 Dec 2023 09:53:14 GMT

Yes only on this data interface

Re: Gateway cannot be reached through port G0/0 named "outside&qu

MHM Cisco World — Tue, 19 Dec 2023 09:56:20 GMT

then no problem check ping from this interface to 8.8.8.8
I think you need NAT to make it access Internet and message disappear.
MHM

Re: Gateway cannot be reached through port G0/0 named "outside&qu

Moiky — Tue, 19 Dec 2023 09:58:13 GMT

This is how my NAT configuration looks like..

Re: Gateway cannot be reached through port G0/0 named "outside&qu

MHM Cisco World — Tue, 19 Dec 2023 10:13:22 GMT

there is default route and your NAT is correct
still are you select

use data interface as the gateway
this option must appear in management interface page
if not directly appear check advanced tab
MHM

Re: Gateway cannot be reached through port G0/0 named "outside&qu

paul driver — Tue, 19 Dec 2023 10:23:30 GMT

Hello
I assume 192.168.45.45/24 is your internal lan subnet?
If so why do you have a default-gateway applied to it , You already have a default route <route outside 0.0.0.0 0.0.0.0 x.x.x.x >

Re: Gateway cannot be reached through port G0/0 named "outside&qu

Moiky — Wed, 20 Dec 2023 03:07:49 GMT

I tried pinging from Inside going to 8.8.8.8 and was unsuccessful.

Re: Gateway cannot be reached through port G0/0 named "outside&qu

Moiky — Wed, 20 Dec 2023 03:09:09 GMT

I also have GW on the Management interface..

Re: Gateway cannot be reached through port G0/0 named "outside&qu

Moiky — Wed, 20 Dec 2023 03:10:17 GMT

Re: Gateway cannot be reached through port G0/0 named "outside&qu

Moiky — Wed, 20 Dec 2023 03:11:42 GMT

I have no default gateway applied to my internal lan subnet.. only on the managemend interface which i'm unable to remove.