Have a branch office with UTM 120 (limited ports) and need to access a subnet of security devices. UTM Internal eth0 is connected to port 24 of Linksys SRW224GP switch. If I understand Sophos guide for VLANs, I need to convert Eth0 from a standard ethernet interface to a VLAN ethernet interface. Then the internal LAN must not use default VLAN 1 untagged. So I make the Internal subnet VLAN 100. Then add another VLAN interface on Eth0 and make it VLAN 200. My security devices are connected to a separate swith that uplinks to the Linksys on port 5, So I create VLAN 100 and VLAN 200 on the Linksys, and make port 5 a member of VLAN 200 and the remaining ports a member of VLAN 100. Port 24 is made a Trunk type port and a member of both 100 and 200? It seems that when I did this I could get to the security devices but could no longer get to the lan devices.
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