Since systemd exposes the hostname "_gateway" (ie. `ping _gateway`) on systemd 
OSes, does this pose any security risk if any website decides to use that 
hostname to access your router?

On appVMs this apparently can't be an issue, because _gateway points to a 10. 
IP class, in fact, it point to sys-firewall's IP (assuming sys-firewall is the 
net VM set for that appVM in its settings).

On a vanilla Linux though, it seems that websites could access the router by 
using the _gateway hostname. Does anyone know if this can be done? It'd be 
kinda lame if so... and I can only imagine the attacks that could be performed.

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