I would need to restrict the access to configuration utility GUI on only one VLAN, how is this done? I don't want to restrict the access based on the source IP, but just to have the port 443 listening only on the VLAN that is used for O&M purposes. The software version is 11.6.0.
You can configure this with Port Lockdown settings on the self-IPs - for all other VLANs, set port lockdown to Allow None
On the one VLAN you want access, set Port Lockdown to Allow Default or Allow Custom