Inter VLAN Communication is not working


I am using Sophos XG115 as the firewall and i do have a layer 3 switch (Unifi 8 port POE 60W switch)  which leverages VLANS created & tagged at XG115. 

Users in different VLANs want to connect to devices (e.g. Network Printer and Network Attached Storage device [TerraMaster]) located in another VLAN. 

i have created a firewall rule which enables the communication between VLANS. I have also created DHCP records for each VLANs at XG115. 

I am able to PING to the gateway addresses of each VLAN. Unfortunately, the trace route keeps on failing at the gateway address of LAN network port at XG11 5when trying to reach to devices in different VLANs. 

Can someone help me in steps on what we should be adding or enabling to allow users in different VLANs to access the NAS and Printer?

Please note that users are on stand-alone Windows 10 devices. There is no active directory or LDAP integrations (i mean there is no Windows server). 

Below is a diagram of the network. An early response is highly appreciated. 

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[edited by: emmosophos at 4:39 PM (GMT -7) on 2 Sep 2021]
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  • Hi Ian

    After deleting and recreating the VLAN and Rule, i am now able to access the NAS by using the UNC path. I am not sure what was the issue which prevent access from the previous arrangements. 

    The firewall rule is same as screenshot displaying 40toLAN where Source LAN, ANY and then Destination LAN with ANY. As soon as I change ANY to specific VLANs, then i am unable to communicate with the NAS. 

    I don't want some VLANs to access NAS, hence need to find a way to prevent such VLANs accessing NAS. How do i achieve that?

  • You need to setup firewall rules LAN "VLAN Network" LAN any allow log. I suspect you are changing the ANY to the VLAN interface IP address rather than the VLAN IP network range.


    V18.5.x - e3-1225v5 6gb ram with 4 ports - 20w. 
    If a post solves your question use the 'This helped me' link.
  • Can you please give me an example to get a better understanding of your guidance? 

  • VLAN interface VLAN network


    V18.5.x - e3-1225v5 6gb ram with 4 ports - 20w. 
    If a post solves your question use the 'This helped me' link.
  • Hi Ian

    Quick update to you.

    I was able to use this method and restrict access by unwanted devices. Thanks for your guidance. 

    At the moment i am using any for services but i want to restrict that to ports require for NAS (such as 445). I have tried with 445 and 137 as SMB ports, but no success. 

    The firewall at the NAS is disabled.