Hi everyone
I’m fighting with a network issue, where my synology nas doesn’t accept any connection from outside it’s subnet.
So, here’s my setup:
Unifi Infrastructure with three separated subnets:
xxx.xxx.2.0/24
- no vlan - pool with all “safe” devices (notebooks, mobiles, servers etc.)xxx.xxx.83.0/24
- vlan 83 - here are all the IoT devices, including nvidia shield, multiple chromecast music devices etc.)xxx.xxx.20.0/20
- vlan 20 - quarantined guest wlanxxx.xxx.2.42 and 43
my I got a new NAS and i designated my old DS214play (running DSM 7.1.1-42962 Update 6) as a Mediaserver that gets to live in the IoT net:
xxx.xxx.2.50
to xxx.xxx.83.50
The Firewall on the NAS is not activated
Issue:
What I tried:
unifi firewall logs
--> requests get sent from the nas and answers from the other devicelogs of other devices (DNS, NetCat etc.)
--> they receive the requests outside of the subnet, and return their anser but the NAS seems to block/ignore any incoming packages.What I didn’t try:
"Network Interface" > "LAN" > "Enable VLAN(802.1Q)"
since, as far as I understand, the Unifi VLAN implementation terminates the VLAN tag at the port of the switch (and all other devices work without specifying it locally)I’m completely stuck how to solve the issue, so I have moved the NAS back to the default net, but some use cases are not working properly that way, so I’d really like to move it to the IoT subnet. Does anybody have (has?) any hints or knows of some obscure settings which need to be updated? I’d be really grateful for any pointers.
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It’s normal for a switch to strip a vlan tag when it sends a packet out, so that the endpoint doesn’t have to support vlans. Don’t worry about that. As far as the endpoint is concerned, it’s just normal subnetting.
When it’s on the other vlan, can you even ping it? When you check the packet capture, can you see the ping and response? Where does it get dropped?
okay that’s what I thought
if I try to ping it it doesn’t answer, the unifi logs do show that the packages have been forwarded to the subnet. If I use netcat to open a port on the other device it receives the connection request, but the NAS doesn’t recognize it. Maybe I have to do some Wiresharking on a mirror port to see what exactly comes back, hoped I could get around it