Ok, so you have install what seems to be a desktop Linux machine, behind
a router/firewall of you home/office, in any case mos default
instalations would set the DNS server in the file /etc/resolv.conf if
you dont have this then you miss something or something else is
resolving in its place, in any case you would have a resolv.d or other
similar files in its place.
So first check what do you have, try
cat /etc/resolv.conf
You can execute this command from shell as simple user, you should be
seeing something like this
# Generated by NetworkManager
search adinet.com.uy com.uy
nameserver 184.106.242.193
nameserver 67.23.7.56
Provided you use NetworkManager which is Gnome default install, :D and
nameserver IPs would change to match your network configuration.
if that looks ok try this command, be ware that it might not be install,
hardly but posible
dig www.yahoo.com
; <<>> DiG 9.7.3 <<>> www.yahoo.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4698
;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;www.yahoo.com. IN A
;; ANSWER SECTION:
www.yahoo.com. 295 IN CNAME fp3.wg1.b.yahoo.com.
fp3.wg1.b.yahoo.com. 48 IN CNAME any-fp3-lfb.wa1.b.yahoo.com.
any-fp3-lfb.wa1.b.yahoo.com. 295 IN CNAME
any-fp3-real.wa1.b.yahoo.com.
any-fp3-real.wa1.b.yahoo.com. 30 IN A 98.139.180.149
any-fp3-real.wa1.b.yahoo.com. 30 IN A 209.191.122.70
;; Query time: 232 msec
;; SERVER: 184.106.242.193#53(184.106.242.193)
;; WHEN: Mon Oct 24 22:24:24 2011
;; MSG SIZE rcvd: 144
if you get an empty answer be shure the SERVER line has a proper server
in it, or try the same command with the add of @8.8.8.8 which will query
one of Googles DNS servers, that should work provided server is up, and
connectivity to it is Ok,
This will thell you whether your network allows you to contact foreign
DNS server, or not and whether you can resolve to them. You can try to
replace your resolv.conf with this DNS server but when you restart your
NetworkManager it will replace your changes, you can hardcore this in
NetworkManager.
Hope this was of any help, talk back to see how you did and if you need
more help.
Sincerely,
Carlos Bergero
El 24/10/11 21:29, Greg van Anders escribió:
Thanks Bob and Tom.
I didn't install a DNS server and I am connecting via DHCP.
The results of the various commands are below.
Thanks for your help!
Greg
# dpkg -l bind
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Description
+++-==============-==============-============================================
un bind<none> (no description available)
# cat /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
allow-hotplug eth0
#NetworkManager#iface eth0 inet dhcp
# cat /etc/resolv.conf
# Generated by NetworkManager
nameserver 192.168.1.254
# grep hosts /etc/nsswitch.conf
hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4
# ifconfig
eth0 Link encap:Ethernet HWaddr 00:1d:72:80:50:cb
inet addr:192.168.1.103 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::21d:72ff:fe80:50cb/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:14800 errors:0 dropped:0 overruns:0 frame:0
TX packets:3465 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2590636 (2.4 MiB) TX bytes:301977 (294.8 KiB)
Interrupt:20 Memory:f8200000-f8220000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:108 errors:0 dropped:0 overruns:0 frame:0
TX packets:108 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:8956 (8.7 KiB) TX bytes:8956 (8.7 KiB)
# netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
0.0.0.0 192.168.1.254 0.0.0.0 UG 0 0 0 eth0
# cat /etc/hosts
127.0.0.1 localhost
127.0.1.1 sunny
# The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
On Mon, Oct 24, 2011 at 5:48 PM, Bob Proulx<b...@proulx.com> wrote:
Greg van Anders wrote:
I just did a brand new installation of Squeeze. The install seemed
to go fine and I didn't notice any problems.
Did you select, at the task selection menu, the "DNS Server" task?
You should be able to resolve names in both cases but the debug route
is different in the different cases. If you selected it then you will
have bind9 installed. If not then you won't. Either is okay. We
just need to know.
$ dpkg -l bind9
Upon booting, however, I don't seem to be able to resolve any hosts
other than www.debian.org and security.debian.org.
That is odd. You are booting using a DHCP address or a static
address? DHCP will supply a nameserver. If static then you must
supply one statically.
What are the contents of your /etc/network/interfaces file?
$ cat /etc/network/interfaces
What are the contents of your /etc/resolv.conf file?
$ cat /etc/resolv.conf
Also /etc/nsswitch.conf just to make sure it isn't a reason either.
$ grep hosts /etc/nsswitch.conf
hosts: files dns
Unfortunately there are several possibilities here depending upon the
contents of the files and the debug path is different depending upon
the result. I will stop there but that should get things going.
If I open up a terminal, ifconfig shows an IP address, and I can
traceroute to other hosts for which I know the IP, but I can't for
anything I specify by name.
Good. You have network connectivity. Network connectivity is a
prerequisite for DNS to work. But those are two separate things and
otherwise unrelated to each other.
Bob
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