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I have two networks, 172.16.4.0/22 and 172.16.16.0/22. There are two firewalls/GW

GW1: 172.16.4.1 & Internet 
GW2: 172 16.4.2 & 172.16.16.1

Behind GW2 are some spezial computer. I don´t like to use NAT on GW2, so each computer which likes to communicate with the 172.16.16.0/22 needs a route. I do this already on some Windows machines and this works fine: Ständige Routen:

Netzwerkadresse Netzmaske Gatewayadresse Metrik 172.16.16.0 255.255.252.0 172.16.4.2 1

Actually i try to ping from a windows machine 172.16.19.5 a Qnap 172.16.4.10.

I added the following routes to qnap:

Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 172.16.4.1 0.0.0.0 UG 0 0 0 eth0 127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo 172.16.4.0 0.0.0.0 255.255.252.0 U 0 0 0 eth0 172.16.16.0 172.16.4.2 255.255.252.0 UG 0 0 0 eth0

  1. From Qnap 172.16.4.10 i can ping the Windows machine 172.16.19.5
  2. From the windows machine 172.16.19.5 i can´t ping the qnap 172.16.4.10
  3. If i enable NAT on gw2 all works fine

I can´t see my problem. Is there a mistake in adding the route to the qnap?

I already checkt the firewall log, there is nothing blocking. On a windows machine the ping is no problem.

leon
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1 Answers1

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which NAS you used ? may need to check the tutorial about NVS: Network Virtual Switch

https://www.qnap.com/en/how-to/tutorial/article/how-to-use-and-set-up-your-network-virtual-switch

and0421
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