SG300 security problem for the Switch

I think it's a security risk to have a port configured as anything other than access if it's only to be "dumb" connected hosts (printers, workstations, etc.).  So, I usually only assign the VLAN management as the PVID of a trunk port that goes to a server or another switch / virtual machine host and a port configured in the access mode with him VLAN management implemented because its PVID (unidentified), and then a PC can be connected directly to access the web management interface.

My concern is that no matter what VLAN I assign a port to, both when trunk or access, I can connect a PC and navigate to any IP VLAN (*. 254) and press canvas logical interface of the switch.  What a security risk?  How can I configure the switch so that the only way to access the management interface is via a host that is directly connected to a port that has the management VLAN, as is PVID?

That sounds about right. But something can be done about it.

Let's say that there are management VLAN 10. Also, there is a production 5 VLAN - 20, 30, 40, 50, 60. It is a place that allows traffic to pass from one VLAN to the other router.

Someone of VLAN 50 will be able to access the 10 VLAN (VLAN management).

By implementing a firewall on the router we can restrict access to certain hosts or networks to VLAN 10. For example, VLAN 20 is admin VLAN (your computer is connected to this VLAN), so we load the firewall to reject all traffic to VLAN 10 unless it comes from VLAN 20.

At this point, there will be no access to the page web of the switch to anyone else than you.

Tags: Cisco Support

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