[Dnsmasq-discuss] DNSmasq forwarding to DNS doesn't works

[Jérémie SYLVAND]

Hello,

I can ping my gateway (the box on the same network) but with a ping to the
DNS server it told me Network is unreachable.
I'm looking for what could make the network unreachable.
Thank you.

Regards,
 ------------------------------
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2011/8/26 Frederick C. Damen <fred at damen.org>

> from the fedoraserver machine try
> ping 89.2.0.1
> traceroute 89.2.0.1
> telnet 89.2.0.1 53
> this should tell you if you at least have conectivity;
> repeat with each upstream dns server IP address.
>
> If your (r)syslog log level is set higher than the log-queries then they
> will not make it to the (r)syslog file.  Try using the
> --log-facility=/tmp/dnsmasq-queries
> Then try ping google.com
>
> Do not put the IP address of you ethx IP addresses in /etc/resolv.conf.
>  Every machine can refer to its self as 127.0.0.1.  dnsmasq is smart
> enough to ignore this address and not use it as an upstream dns server.
>  I have not seen anything stating that dnsmasq will ignore the ethx IP
> address as a upstream dns server.  Besides 127.0.0.1 address should
> always work on the local machine even if your networking is all screwed up.
>
> Fred
>
> On 08/26/2011 10:29 AM, Matthias Andree wrote:
> > Am 26.08.2011 17:15, schrieb Jérémie SYLVAND:
> >> Hello
> >>
> >> Thank you for your answers.
> >>
> >> I have tried what you told me, in different thing :
> >> using resolv.conf with only 127.0.0.1
> >> with 127.0.0.1 and one of my ISP nameserver
> >>
> >> Not using resolv.conf by the line no-resolve in the dnsmasq.conf :
> >> with and without this line : server=127.0.0.1
> >> and with all my ISP nameserver addresses
> >> server=89.2.0.1
> >> server=89.2.0.2
> >> server=212.30.96.123
> >> server=213.203.124.147
> >> in the dnsmasq.conf
> >>
> >> And it still doesn't works
> >>
> >> My logs :
> >>
> >> # tail -f /var/log/messages
> >> Aug 26 16:55:23 fedoraserver abrtd: Corrupted or bad crash
> >> /var/spool/abrt/ccpp-1314370523-6770 (res:2), deleting
> >> Aug 26 16:58:02 fedoraserver dnsmasq[7256]: exiting on receipt of
> SIGTERM
> >> Aug 26 16:58:02 fedoraserver dnsmasq[7293]: started, version 2.52
> >> cachesize 6000
> >> Aug 26 16:58:02 fedoraserver dnsmasq[7293]: compile time options: IPv6
> >> GNU-getopt DBus no-I18N DHCP TFTP
> >> Aug 26 16:58:02 fedoraserver dnsmasq-dhcp[7293]: DHCP, IP range
> >> 192.168.0.180 -- 192.168.0.200, lease time 12h
> >> Aug 26 16:58:02 fedoraserver dnsmasq[7293]: using nameserver
> >> 213.203.124.147#53
> >> Aug 26 16:58:02 fedoraserver dnsmasq[7293]: using nameserver
> >> 212.30.96.123#53
> >> Aug 26 16:58:02 fedoraserver dnsmasq[7293]: using nameserver 89.2.0.2#53
> >> Aug 26 16:58:02 fedoraserver dnsmasq[7293]: using nameserver 89.2.0.1#53
> >> Aug 26 16:58:02 fedoraserver dnsmasq[7293]: read /etc/hosts - 3
> addresses
> >
> > OK, so the nameserver configuration works, but it has not logged any
> > queries that it would have forwarded so far - check if there are any
> > further down.
> >
> > Please check:
> >
> > - if bind-interfaces makes any difference
> >
> > - possibly remove the interface configuration tying dnsmasq to eth0 just
> > to see if it helps
> >
> > - your resolv.conf on the fedoraserver should point to the primary eth0
> > address
> >
> > - Firewall configuration
> >
> > - /etc/resolv.conf and /etc/host.conf on the clients
> >
> > - possibly use wireshark or tcpdump to check port 53 traffic (possibly
> > check various interfaces)
> >
> > _______________________________________________
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> > Dnsmasq-discuss at lists.thekelleys.org.uk
> > http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
>
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