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In short, no this is not possible. To cross VLANs, you need a layer 3 device (L3 switch or a router). I'm going to assume that you have no control over the ISP CPE and say that you will need to acquire some additional equipment before making this setup work.


You didn't provide an OS for the server machine, so I'm going to make several assumptions here. You can use iptables for this on Linux servers (i.e. configure the server to act as a router). First, you need to enable IP routing on the server machine: sysctl -w net.ipv4.conf.all.forwarding=1 Let's assume the vlans are both connected to the server on eth1 ...


You're using /24 on one switch and /28 on the other. That means thinks is in the same subnet, it is not. You'll need to route between the networks.

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