I'm dealing with a networking issue where I have two VLANs: VLAN 53 (my server VLAN at 192.168.153.0/24) and VLAN 54 (my workstation VLAN at 192.168.154.0/24). Right now, I have two TrueNAS devices on VLAN 54 that I want to move to VLAN 53. I can access them perfectly fine from either VLAN when they're on VLAN 54. However, after moving them to VLAN 53, I can access them from devices on VLAN 53, but not from those on VLAN 54. Access to other servers on VLAN 53 from VLAN 54 works without issues, so it seems isolated to the TrueNAS devices. I've checked their switch port configurations, and everything looks good there. I've also looked at the ACLs for both VLANs and don't see any restrictions that should be blocking access. I've tried accessing the TrueNAS devices through their IP addresses directly to eliminate any DNS issues. Has anyone run into something similar or have any pointers on what I might be missing?
3 Answers
Make sure to check the TrueNAS web UI from VLAN 53. Sometimes there are settings under SMB or HTTP services that specify allowed networks. If the TrueNAS system has a list of permitted networks, you might need to update it when moving devices between VLANs. Also, verify any firewall settings on the TrueNAS device that could be restricting access based on the VLAN configuration.
It sounds like the problem might be on the switch configuration side. Double-check that the trunk ports are set up correctly to allow traffic from both VLANs. If your port is only allowing tagged VLAN 54 traffic, it could explain why it's blocking access to devices on VLAN 53. You may want to replicate the configurations of other ports that are working correctly as a reference.
The issue could stem from your native VLAN configuration. Your interface setup might be stripping tags for VLAN 54 traffic, causing a conflict. Take a closer look at how the native VLAN settings are applied and consider isolating traffic on access ports unless absolutely necessary to have trunk ports.
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