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Groups > linux.debian.user > #185860

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

From Pascal Hambourg <pascal@plouf.fr.eu.org>
Newsgroups linux.debian.user
Subject Re: DHCP server that itself gets an IP address by DHCP
Date 2017-08-24 22:30 +0200
Message-ID <ui6Vj-2MH-3@gated-at.bofh.it> (permalink)
References <uhWMh-4E5-7@gated-at.bofh.it>
Organization linux.* mail to news gateway

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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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Thread

Re: DHCP server that itself gets an IP address by DHCP Reco <recoverym4n@gmail.com> - 2017-08-24 11:40 +0200
  threading, was Re: DHCP server that itself gets an IP address by DHCP David Wright <deblis@lionunicorn.co.uk> - 2017-08-24 15:30 +0200
    Re: threading, was Re: DHCP server that itself gets an IP address  by DHCP Reco <recoverym4n@gmail.com> - 2017-08-24 17:10 +0200
  Re: DHCP server that itself gets an IP address by DHCP Pascal Hambourg <pascal@plouf.fr.eu.org> - 2017-08-24 22:30 +0200
    Re: DHCP server that itself gets an IP address by DHCP Greg Wooledge <wooledg@eeg.ccf.org> - 2017-08-24 22:40 +0200
      Re: DHCP server that itself gets an IP address by DHCP Mark Fletcher <mark27q1@gmail.com> - 2017-08-25 00:40 +0200
        Re: DHCP server that itself gets an IP address by DHCP Greg Wooledge <wooledg@eeg.ccf.org> - 2017-08-25 14:20 +0200
          Re: DHCP server that itself gets an IP address by DHCP Mark Fletcher <mark27q1@gmail.com> - 2017-08-25 15:20 +0200
            Re: DHCP server that itself gets an IP address by DHCP Greg Wooledge <wooledg@eeg.ccf.org> - 2017-08-25 16:00 +0200
    Re: DHCP server that itself gets an IP address by DHCP Reco <recoverym4n@gmail.com> - 2017-08-24 22:40 +0200
      Re: DHCP server that itself gets an IP address by DHCP Mark Fletcher <mark27q1@gmail.com> - 2017-08-25 00:30 +0200
        Re: DHCP server that itself gets an IP address by DHCP Reco <recoverym4n@gmail.com> - 2017-08-25 10:20 +0200
        Re: DHCP server that itself gets an IP address by DHCP Greg Wooledge <wooledg@eeg.ccf.org> - 2017-08-25 14:20 +0200

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