Router: DNS lookup on physical SSID not on virtual SSID

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zedii

December 05, 2016 08:28

I'm forcing use of OpenDNS from my router to connected devices using prerouting in my iptables. Is it possible to change the DNS server for a virtual interface (with its own unique SSID) but still use Open DNS on the physical interface on the same router?

Alternately, can I allow a particular device(s) to use a separate DNS server while enforcing DNS on all other devices connected to the router? I'm running dd-wrt on an Archer T7.

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  zedii December 05, 2016 08:30

  I'm using this nat command<

  iptables -t nat -A PREROUTING -i br0 -p udp --dport 53 -j DNAT --to $(nvram get lan_ipaddr)
  iptables -t nat -A PREROUTING -i br0 -p tcp --dport 53 -j DNAT --to $(nvram get lan_ipaddr)

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  mattwilson9090 December 05, 2016 09:20

  It's certainly possible to do this, but I have no idea if it's possible with DD-WRT.

  You should ask this in a DD-WRT forum, since you are asking about routing and DNS questions that are not at all specific to OpenDNS.

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  zedii December 05, 2016 14:01

  True. Here's the documentation on how to do it: http://www.dd-wrt.com/wiki/index.php/Multiple_WLANs

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