[SOLVED] Names are not resolved

**Daan** · 10-07-2009

Hi,

I'm trying to use the internet from a LaCie network attached storage device (NAS), but names are not resolved:

Code:

HAL /root # ping uva.nl
ping: uva.nl: Host name lookup failure

From my Windows XP desktop it works just fine:

Code:

Daan@PC-ML ~
$ ping uva.nl

Pingen naar uva.nl [145.18.68.50] met 32 byte gegevens:

Antwoord van 145.18.68.50: bytes=32 tijd=9 ms TTL=245
Antwoord van 145.18.68.50: bytes=32 tijd=11 ms TTL=245
Antwoord van 145.18.68.50: bytes=32 tijd=8 ms TTL=245
Antwoord van 145.18.68.50: bytes=32 tijd=10 ms TTL=245

Ping-statistieken voor 145.18.68.50:
    Pakketten: verzonden = 4, ontvangen = 4, verloren = 0
    (0% verlies).De gemiddelde tijd voor het uitvoeren van één bewerking in milliseconden:
    Minimum = 8ms, Maximum = 11ms, Gemiddelde = 9ms

Pinging using the ip address works from from the NAS:

Code:

HAL /root # ping 145.18.68.50
PING 145.18.68.50 (145.18.68.50): 56 data bytes
84 bytes from 145.18.68.50: icmp_seq=0 ttl=245 time=11.4 ms
84 bytes from 145.18.68.50: icmp_seq=1 ttl=245 time=8.6 ms
84 bytes from 145.18.68.50: icmp_seq=2 ttl=245 time=9.9 ms
84 bytes from 145.18.68.50: icmp_seq=3 ttl=245 time=8.0 ms

--- 145.18.68.50 ping statistics ---
4 packets transmitted, 4 packets received, 0% packet loss
round-trip min/avg/max = 8.0/9.4/11.4 ms

Checking the network settings on the NAS gives:

Code:

HAL /root # ifconfig egiga0
egiga0    Link encap:Ethernet  HWaddr 00:D0:4B:86:23:B0
          inet addr:192.168.1.105  Bcast:255.255.255.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:828 errors:0 dropped:0 overruns:0 frame:0
          TX packets:627 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:128
          RX bytes:84146 (82.1 KiB)  TX bytes:77376 (75.5 KiB)
          Interrupt:21

HAL /root # /usr/bin/edmini.sh network get dns egiga0
DNS=( 212.54.40.25 212.54.35.25 )

The NAS got these settings from my router, which acts as DHCP server. The DNS servers on the NAS are the same as on my XP machine:

Code:

Daan@PC-ML ~
$ ipconfig /all

Windows IP-configuratie

        Host-naam  . . . . . . . . . . . .: PC-ML
        Primair DNS-achtervoegsel. . . . .:
        Knooppunttype: . . . . . . . . . .: onbekend
        IP-routering ingeschakeld. . . . .: nee
        WINS-proxy ingeschakeld . . . . . : nee

Ethernet-adapter LAN-verbinding:

        Verbindingsspec. DNS-achtervoegsel:
        Beschrijving . . . . . . . . . . .:
          Realtek RTL8168C(P)/8111C(P) PCI-E Gigabit Ethernet NIC
        Fysiek adres. . . . . . . . . . . : 00-22-15-D5-1E-C8
        DHCP ingeshakeld. . . . . . . . . : ja
        Autom. configuratie ingeschakeld. : ja
        IP-adres. . . . . . . . . . . . . : 192.168.1.101
        Subnetmasker. . . . . . . . . . . : 255.255.255.0
        Standaardgateway. . . . . . . . . : 192.168.1.1
        DHCP-server . . . . . . . . . . . : 192.168.1.1
        DNS-servers . . . . . . . . . . . : 212.54.40.25
                                            212.54.35.25
        Lease verkregen . . . . . . . . . : woensdag 7 oktober 2009 19:58:05
        Lease verlopen . . . . . . . . .  : vrijdag 9 oktober 2009 19:58:05

How do I get my NAS to resolve names?

**Lazydog** · 10-07-2009

Originally Posted by Daan

The NAS got these settings from my router, which acts as DHCP server. The DNS servers on the NAS are the same as on my XP machine

How are you checking this?
Is there a firewall between the NAS and the DNS Server?
Can you ping the DNS servers from the NAS?

**Daan** · 10-08-2009

Thanks for your help, Lazydog.

1. I configured the router to be a DHCP server. And I set the NAS to get settings from via DHCP (using the LaCie Network Assistant). The command I use to check the DHCP servers for the NAS is a bash script written by LaCie.

2. The router is between the NAS and the internet with DNS servers, but I have the firewall option on the router disabled.

3. Yes.

Edit: "I have the firewall option on the NS disabled" -> "I have the firewall option on the router disabled"

**Lazydog** · 10-08-2009

OK, you can ping the DNS servers. Can you post the output from the following command run on the NAS server;

Code:

dig  uva.nl

Can you post resolv.conf?

**Daan** · 10-09-2009

Here's the resolv.conf on the NAS. I tried something straight away but it did not help.

Code:

HAL /root # cat /etc/resolv.conf
search lan
nameserver 192.168.2.254
nameserver 192.168.10.1
nameserver 192.168.0.1
nameserver 212.54.40.25
nameserver 212.54.35.25
nameserver 192.168.1.1
HAL /root # echo "nameserver 212.54.40.25" >> /etc/resolv.conf
HAL /root # echo "nameserver 212.54.35.25" >> /etc/resolv.conf
HAL /root # ping uva.nl
ping: uva.nl: Host name lookup failure
HAL /root # ping google.com
ping: google.com: Host name lookup failure
HAL /root # ping 145.18.68.50           # uva.nl's ip
PING 145.18.68.50 (145.18.68.50): 56 data bytes
84 bytes from 145.18.68.50: icmp_seq=0 ttl=245 time=11.0 ms
84 bytes from 145.18.68.50: icmp_seq=1 ttl=245 time=7.3 ms
84 bytes from 145.18.68.50: icmp_seq=2 ttl=245 time=9.4 ms

--- 145.18.68.50 ping statistics ---
3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max = 7.3/9.2/11.0 ms
HAL /root # ping 74.125.127.100       # google.com's ip
PING 74.125.127.100 (74.125.127.100): 56 data bytes
72 bytes from 74.125.127.100: icmp_seq=0 ttl=50 time=174.1 ms
72 bytes from 74.125.127.100: icmp_seq=1 ttl=50 time=170.2 ms
72 bytes from 74.125.127.100: icmp_seq=2 ttl=50 time=164.7 ms

--- 74.125.127.100 ping statistics ---
3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max = 164.7/169.6/174.1 ms

The dig command is not available on the NAS (which is at my home), but it is at my Linux computer at work:

Code:

daan@pecularia:~$ dig uva.nl

; <<>> DiG 9.5.1-P3 <<>> uva.nl
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 27622
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;uva.nl.				IN	A

;; ANSWER SECTION:
uva.nl.			19908	IN	A	145.18.68.50

;; Query time: 0 msec
;; SERVER: 10.116.37.10#53(10.116.37.10)
;; WHEN: Fri Oct  9 10:57:25 2009
;; MSG SIZE  rcvd: 40

**Lazydog** · 10-09-2009

You I have noticed the following from your post.

You linux computer is work and it is using a different DNS Server then your NAS.
There are too many nameservers in your reslov.conf.

Here is what I would do.

Remove the first 3 DNS servers from the resolv.conf and then test again.
I am suspecting that the sever you have listed are not working, i.e.;

nameserver 192.168.2.254
nameserver 192.168.10.1
nameserver 192.168.0.1

You can test these from your Linux desktop with;

Code:

dig @NAS-DNS google.com

Replacing NAS-DNS with the ip addresses above.

**Daan** · 10-10-2009

Code:

HAL /etc # cat resolv.conf
search lan
nameserver 212.54.40.25
nameserver 212.54.35.25

HAL /etc # ping uva.nl
PING uva.nl (145.18.68.50): 56 data bytes
84 bytes from 145.18.68.50: icmp_seq=0 ttl=245 time=7.8 ms
84 bytes from 145.18.68.50: icmp_seq=1 ttl=245 time=10.1 ms
84 bytes from 145.18.68.50: icmp_seq=2 ttl=245 time=7.7 ms
84 bytes from 145.18.68.50: icmp_seq=3 ttl=245 time=10.3 ms

--- uva.nl ping statistics ---
4 packets transmitted, 4 packets received, 0% packet loss
round-trip min/avg/max = 7.7/8.9/10.3 ms

Thanks a lot Robert!

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