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Core network to Vlan and back

We have a problem with routing from core network to vlan network and back. I do not understand the error.

To the setup:
Core network: 10.10.0.254 (Gateway Sophos9)
DC & DHCP (W2K12): 10.10.0.1
Vlan 20 : 10.10.20.254 (Gateway Sophos9)
Test PC: IP from DHCP 10.10.0.1, Gateway: 10.10.20.254
Server: eth0 -> Switch TP Link -> Fiber -> HP Switch -> Port 1 Test PC

The test PC gets an IP (10.10.20.100) from DHCP (10.10.0.1) via Vlan 20. This works very well.
I created a test rule on the Sophos9: Core network -> Any -> Vlan 20 network.
A ping from the core network to the Sophos (10.10.20.254) works. A ping from the core network to the test PC (10.10.20.100) does not work. Accessing the test PC via RDP does not work either.
The firewall shows no action in the live log from access via RDP. If I try to access the Vlan 20 gateway via RDP, I see in the live log how the packets are dropped.

What am I missing?
Why can't I access the test PC via RDP?

When I bring the test PC into the core network, access via RDP works.

Thanks
Ciao Thomas

This thread was automatically locked due to age.

0 emmosophos over 3 years ago

Hello Thomas,

Thank you for contacting the Sophos Community.

I would recommend you to use the Packet Capture in the XG to see where the traffic is going when you Ping or try to RDP the Test Computer, also make sure that the Local Firewall of the Computer is disabled while you do the test, if you have physical access to the Test Computer, try to Ping from it to your Core Network.

Regards,

Emmanuel (EmmoSophos)

Technical Team Lead, Global Community Support
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