Unable to access internet

[sarveswaranneela]

Hi,

I am facing an issue with one of my client that we are unable the access the internet once the firewall has been added in the network. Please see the configuration from the below and guide me to the resolution.

Switch Configuration.

interface Vlan50
 description MANAGEMENT
 ip address 192.168.50.254 255.255.255.0
!
interface Vlan51
 description DATA VlAN
 ip address 192.168.51.254 255.255.255.0
!
interface Vlan52
 description VOICE VLAN
 ip address 192.168.52.254 255.255.255.0
!
interface Vlan53
 description VIDEO VLAN
 ip address 192.168.53.254 255.255.255.0
!
interface Vlan54
 description CCTV VLAN
 ip address 192.168.54.254 255.255.255.0

!

ip route 0.0.0.0 0.0.0.0 192.168.51.253

!

Fortigate Firewall configuration.

Internal Network-192.168.51.253/255.255.255.0

Static Route-0.0.0.0 0.0.0.0 192.168.51.254

[Seb Rupik]

Looks to me like your Cisco has a default route to the fortigate, and your forigate has a default route pointing back at the Cisco VLAN51 SVI. Data is going to go round in circles!

What device is upstream of the forigate, a router? You should edit it's default route to point at that. Something on it's 'Outside Network' subnet.

cheers,

Seb.