BIND in jail problem

[David N]

2009/2/15 Anders Hagman <anders.hagman at netplex.se>:
> Hi
>
> I'm trying to use BIND inside a jail and have passed the chroot
> problem and have a running named without chroot.
>
> The problem is that the jail does not have the address 127.0.0.1 or does not
> use the info in resolv.conf.
>
> When I use the host command I get:
>
> [root at ippbx1 ~]# host ippbx1
> ;; reply from unexpected source: 172.16.101.3#53, expected 127.0.0.1#53
>
> /etc/resolv.conf
> domain kalmar.se
> search kalmar.se
> nameserver 127.0.0.1
>
> tcpdump:
> 21:33:49.569332 IP (tos 0x0, ttl 64, id 31390, offset 0, flags [none], proto
> UDP (17), length 52) 172.16.101.3.62278 > 172.16.101.3.53: 28477+ A? ippbx1.
> (24)
>
> 21:33:49.569890 IP (tos 0x0, ttl 64, id 31393, offset 0, flags [none], proto
> UDP (17), length 52) 172.16.101.3.53 > 172.16.101.3.62278: 28477 ServFail
> 0/0/0 (24
>
> As you can see the destination address is 172.16.101.3 despite the name
> server address in resolv.conf. The host command does not add the domain as
> it should and sends the query as "A? ippbx1" instead of "A?
> ippbx1.kalmar.se". The host command expects to get an answer from 127.0.0.1.
>
> Changing the nameserver address in resolv.conf to 172.16.101.3 does not
> change anything. Using the FQDN does not help because it's still the wrong
> expected address. The only thing that works is: host ippbx1.kalmar.se
> 172.16.101.3.
>
> Using ping give a different picture:
>
> [root at ippbx1 ~]# ping ippbx1
> ping: cannot resolve ippbx1: Host name lookup failure
>
> /etc/resolv.conf
> domain kalmar.se
> search kalmar.se
> nameserver 172.16.101.3
>
>
> tcpdump:
> 21:47:39.143152 IP (tos 0x0, ttl 64, id 31817, offset 0, flags [none], proto
> UDP (17), length 62) 172.16.101.3.60878 > 127.0.0.1.53: 35805+ A?
> ippbx1.kalmar.se. (34)
> 21:47:39.143165 IP (tos 0x0, ttl 64, id 31818, offset 0, flags [none], proto
> ICMP (1), length 56) 127.0.0.1 > 172.16.101.3: ICMP 127.0.0.1 udp port 53
> unreachable, length 36
>
>
> ping does add the domain to the query but does not read the address from
> resolv.conf and sends the query to 127.0.0.1. And 127.0.0.1 is the host 0
> machine and does not run BIND.
>
>
> uname -a
> FreeBSD ippbx1.kalmar.se 7.1-RELEASE FreeBSD 7.1-RELEASE #0
> named -v
> BIND 9.4.2-P2
>
> named.conf:
> zone "kalmar.se"                { type master; file "master/kalmar"; };
> zone "101.16.172.in-addr.arpa"  { type master; file "master/kalmar.rev"; };
>
> zone file kalmar:
>
> $TTL 3h
> @ SOA ippbx1.kalmar.se. root.ippbx1.kalmar.se. 42 1d 12h 1w 3h
>        ; Serial, Refresh, Retry, Expire, Neg. cache TTL
>
>        IN      NS      ippbx1.kalmar.se.
> ippbx1  IN      A       172.16.101.3
>
> zone file kalmar.rev:
>
> $TTL 3h
> @ SOA ippbx1.kalmar.se. root.ippbx1.kalmar.se. 42 1d 12h 1w 3h
>        ; Serial, Refresh, Retry, Expire, Neg. cache TTL
>        IN      NS      ippbx1.kalmar.se.
> 3       IN      PTR     ippbx1.kalmar.se.
>
>
> Why do I what to run BIND inside a jail? Well I'm building a IP-PBX lab
> and want to run six autonomous jails with DNS, DHCP, NTP and asterisk
> inside.
> DHCP and Asterisk works but DNS is vital for the lab.
>
> BR
> Anders H
>
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>

Hi,

You also need in your name.conf

options {
allow-query { 10.0.0.0/8; };    <-- replace with your own network
listen-on { 10.1.20.1; };    <-- replace with your jail IP
forwarders { xx.xx.xx.xx; xx.xx.xx.xx; };  <-- replace with your
upstream DNS servers (supplied by ISP)
};

in the resolve.conf
should be your domain and DNS server(s) IP addresses, not 127.0.0.1,
there is no localhost inside the jails, so it wont work.

Regards