Networking Question

[Matt Graham]

On 2019-12-07 14:20, kitepilot at kitepilot.com wrote:
> Mark Phillips writes:
>> dd-wrt router (ASUS RT_N16) would do this. I then
>> noticed that the firmware was over 2 years old, so I thought, I 
>> should
>> upgrade the firmware. Long story short, I may have bricked my router.
>> My question is, can I run the wifi on SUBNET (192.168.25.x) and my 
>> wired
>> connection on another SUBNET
> You *HAVE* to configure different subnets in each interface or you'll
> have a chaos.

Not necessarily.  I have a bog-standard Netgear consumer grade 
wireless/wired gateway.  It serves up addresses in 192.168.2.0/24 to 
wired and wireless clients.  The option for having a separate subnet for 
(whatever) is called "guest network" in this, consult your man page for 
dd-wrt for what that's called there.

My device is probably doing something funky involving bridging in its 
guts so that it allows 192.168.2.1 to be accessible over wired and 
wireless interfaces.  I think I turned on both wired and wireless 
networking on my laptop at some point, and it didn't break everything.  
I'll have to wait a few hours to try that out again though.  This is 
*not* recommended, but it should not be the horrible failure you got in 
the 2000s if you had 2 wired Ethernet devices on the same machine in the 
same subnet.  ICBW though.

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