[Tfug] Problems with local DNS using DD-WRT and dnsmasq
Jon
bigj at voipmogul.net
Sat Sep 27 09:55:22 MST 2014
Did you look at the dd-wrt wiki? I swear I saw how to do this on there
just last week.
On September 27, 2014 9:19:47 AM Zack Breckenridge <zbrdge at gmail.com> wrote:
> Just a stab in the dark:
>
> Try changing the line:
>
> local=/merseine.nu/
>
> To:
>
> domain=merseine.nu,192.168.1.0/24,local
>
> Then uncomment your host-record lines and comment out your ptr-record
> lines. And see what happens. Sorry if you've already tried this..
>
> Also, can you tell us what version of of dnsmasq is shipped with this
> dd-wrt firmware?
>
> Zack B.
> On Sep 26, 2014 9:06 PM, "John Gruenenfelder" <jetpackjohn at gmail.com> wrote:
>
> > TFUG,
> >
> > Hello again. I'm having some annoying problems with my current
> > installation
> > of DD-WRT when trying to set up local DNS resolution. So far, I've asked
> > first in the DD-WRT forum with no reply and then posted on StackExchange
> > (superuser forum) again with no reply. I hope somebody here is
> > knowledgeable
> > about DD-WRT and dnsmasq in particular.
> >
> > I can work around the problem on most of my machines by putting the correct
> > entries in the /etc/hosts file, but that's not really an option for other
> > machines like Android phones. The other big issue is portability
> > (physical,
> > that is). When an Android phone or a laptop is connected through the LAN,
> > it
> > needs to resolve the hostnames to internal IP addresses, but when it is
> > connecting from the Internet (to the one host accessible that way) the same
> > hostname needs to resolve to the external IP. You can do this with local
> > DNS
> > resolution but not so much with static /etc/hosts entries.
> >
> > Anyway, here is my original forum posting with all the config info. I
> > really
> > hope somebody here has some ideas because, so far, the Internet has been a
> > big
> > let down on this issue... :( Thanks!
> >
> > ----------------------------------------
> >
> > I just upgraded my ASUS RT-AC56U router to a newer DD-WRT, build 23940.
> > This
> > is the latest as provided by the website's router database even though it
> > is
> > from April 22, 2014. If a newer release contains a fix for the following
> > DNS
> > issues, I would install it, but I don't want to make that jump unless I
> > know
> > for sure that I need a newer build (that is, I'm trying to avoid beta
> > builds).
> >
> > My configuration is simple enough, but I am having trouble getting my full
> > DNS
> > configuration working. My network setup:
> >
> > Using subnet 192.168.1.0
> > Router at 192.168.1.1
> > Two machines with static IPs: 192.168.1.2 and .3
> > One static DHCP lease at: 192.168.1.5
> > All other wired and wifi clients are DHCP
> >
> > Using just the settings available in the admin GUI, with most everything
> > set
> > at the defaults, I get no local DNS resolution at all. DNS for the wider
> > Internet does work. After searching around the Net and on both Stack
> > Exchange
> > and DD-WRT forums, I did find some helpful config advice. I have the
> > following
> > in the "Additional DNSMasq Options" box:
> >
> > #####
> > # Additional dnsmasq config options
> > #####
> >
> > local=/merseine.nu/
> > expand-hosts
> > domain-needed
> >
> > ### DNS records - merseine.nu home network ###
> > #host-record=moongate.merseine.nu,moongate,192.168.1.1
> > #host-record=swordfish.merseine.nu,swordfish,192.168.1.2
> > #host-record=bebop.merseine.nu,bebop,192.168.1.3
> >
> > ### DNS records (reverse lookup) - merseine.nu home network ###
> > ptr-record=1.1.168.192.in-addr.arpa,moongate.merseine.nu
> > ptr-record=2.1.168.192.in-addr.arpa,swordfish.merseine.nu
> > ptr-record=3.1.168.192.in-addr.arpa,bebop.merseine.nu
> >
> > ### static DHCP records ###
> > dhcp-host=e8:03:9a:38:e4:90,192.168.1.5,redtail.merseine.nu,infinite
> >
> > With this setup, remote DNS functions, but I can do local resolution only
> > on
> > the "redtail" hostname. Notice that the host-record lines are commented
> > out. If I uncomment them, DNSMasq no longer starts on the router and
> > therefore
> > all DNS is broken.
> >
> > If it helps, the remaining DNS/DNSMasq related settings in the GUI are:
> >
> > Basic setup -> DHCP settings:
> >
> > Use DNSMasq for DHCP: checked
> > Use DNSMasq for DNS: checked
> > DHCP-Authoritative: checked
> >
> >
> > Services -> DHCP server:
> >
> > Used domain: LAN & WLAN
> > LAN domain: merseine.nu
> >
> >
> > Services -> DNSMasq:
> >
> > DNSMasq: cheked
> > Local DNS: checked
> > No DNS rebind: checked
> >
> > What am I doing wrong here? Is 'dhcp-host' the wrong option to use? From
> > the
> > manual, it should add A, AAAA, and PTR records, and I think that is what I
> > want it to do. I believe the manual also said that 'host-record' lines
> > would
> > also create all of the necessary records, but, as stated above, using them
> > appears to create an invalid configuration which then prevents dnsmasq from
> > even starting.
> >
> > It seems like much of this would be simpler if I could just add these
> > items to
> > /etc/hosts on the router, but you cannot do that from the admin GUI, and I
> > think if I edit that file on the router it will be overwritten (probably
> > on a
> > reboot).
> >
> > Everything else that I use dd-wrt for is functioning properly. I don't make
> > much use of many of the more advanced features, so most of them are
> > disabled.
> >
> >
> > --
> > --John Gruenenfelder Systems Manager, MKS Imaging Technology, LLC.
> > Try Weasel Reader for PalmOS -- http://weaselreader.org
> > "This is the most fun I've had without being drenched in the blood
> > of my enemies!"
> > --Sam of Sam & Max
> >
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>
>
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