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Re: DHCP server that itself gets an IP address by DHCP



Le 24/08/2017 à 11:30, Reco a écrit :

Somewhat hackish, but straightforward way to achieve this is to redirect
DNS requests from your LAN to correct DNS. Something like this should do
the trick:

Not so straightforward because you still need to get the ISP's DNS and update the iptables rules whenever the DNS change.

iptables -t nat -A OUTPUT -i <LAN Port> -p udp --dport 53 \
-j DNAT --to-destination <ISP DNS>:53

iptables -t nat -A OUTPUT -i <LAN Port> -p tcp --dport 53 \
-j DNAT --to-destination <ISP DNS>:53

You mean "-A PREROUTING".


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