DNS Settings (mlunix)

[AMINE LTAIEF]

This is my first message on the forum so I’m software engineer.
I just started with Multitech Conduit mLunix I have succeeded to configured and set a Eth connection but My gateway can’t access to internet due to DNS settings.
I tried to set my DNS in resolv.conf file but always i had the following commands :

root@mtcdt:~# ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=57 time=29.7 ms
64 bytes from 8.8.8.8: icmp_seq=2 ttl=57 time=28.9 ms

Then

root@mtcdt:~# wget google.com
--2017-11-09 21:22:24--  http://google.com/
Resolving google.com... failed: Name or service not known.
wget: unable to resolve host address 'google.com'

I have noticed that after reboot I lose the DNS settings !!

What do you think ?

Thanks a lot for your help
Amine LTAIEF

[Daniel Yang]

Check out http://www.multitech.net/developer/forums/topic/mlinux-resolv-conf-issue/#post-9878.

As Brandon pointed out, /etc/resolv.conf is configured by default as a “volatile” file and this scheme works well when using DHCP or when using PPP (cellular). A simple workaround for static configuration is to put something like the following in your /etc/network/interfaces file for eth0.

post-up echo “nameserver 8.8.8.8″ > /etc/resolv.conf

[John Klug]

If using dnsmasq, the location of /etc/resolv.conf is configurable. A suggested location would be /etc/network/resolv.conf.

In your DNS configuration for dnsmasq:

resolv-file=/etc/network/resolv.conf

[AMINE LTAIEF]

Hello,

Thank you for your responses
after adding the following line under etho config :
post-up echo “nameserver 8.8.8.8″ > /etc/resolv.conf
I have aloways the some issue !! when I exec wget command as follow :

root@mtcdt:~# wget google.com
--2017-11-10 21:28:43--  http://google.com/
Resolving google.com... failed: Name or service not known.
wget: unable to resolve host address 'google.com'

What can I do now please ? I have right configured my /etc/network/interface as follow

# Wired interface
auto eth0
iface eth0 inet static
## Home configuration
address 192.168.0.16
netmask 255.255.255.0
gateway 192.168.0.254

post-up echo “nameserver 8.8.8.8”> /etc/resolv.conf

Thanks a lot for your help
Amine LTAIEF

[David Kruger]

Note: I am using the AEP model.

I would also like a solution to this. Have the exact same issue.
/etc/network/interfaces:

# Wired interface
auto eth0
iface eth0 inet static
address 10.5.90.6
netmask 255.255.255.252
gateway 10.5.90.5
post-up echo “nameserver 8.8.8.8” > /etc/resolv.conf

Looking at /etc/resolv.conf after reboot, there is nothing but the original one line.

This is really annoying!!!

• This reply was modified 6 years, 4 months ago by David Kruger.
• This reply was modified 6 years, 4 months ago by David Kruger.

[John Klug]

Did you try:

ping 8.8.8.8

How about:

ping [gateway address]?

[David Kruger]

Thanks for the suggestion… looks like the conduit firmware neglects (or needs to be done manually) to add the default route. This could be fixed using

route add default gw [gw address]

Annoyed, because this is the second network issue I have encountered in the last week.

• This reply was modified 6 years, 4 months ago by David Kruger.

[John Klug]

Your netmask is questionable:

netmask 255.255.255.252

10.x.y.z is usually class A.

Your netmask would then be 255.0.0.0

I have never had problems with the gateway line in /etc/network/interfaces.

[John Klug]

I should add that /etc/network/interfaces is ignored in AEP, I believe.

[David Kruger]

These are just the IP addresses I was told to use, what the underlying network resembles, I can only guess. Regardless, it seems to be working… for now 🙂

You are right saying that /etc/network/interfaces is ignored. I discovered this while digging further today..

Awaiting support response to the query. Will post it here for interest sake. Or make a new case referring to the AEP model rather.

[AMINE LTAIEF]

Hi,
Always, The same problem !! DNS not resolved, This my configs :

# Wired interface
auto eth0
iface eth0 inet static
## Home configuration
address 192.168.0.16
netmask 255.255.255.0
gateway 192.168.0.254

post-up echo “nameserver 8.8.8.8″> /etc/resolv.conf

Help Please .

root@mtcdt:~# ping google.com
ping: unknown host google.com

root@mtcdt:~# ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=57 time=30.9 ms
64 bytes from 8.8.8.8: icmp_seq=2 ttl=57 time=28.3 ms

Regards,
Amine

[AMINE LTAIEF]

Hello
I have always the same problem, I con’t connect to Internet from my mlunix
What can I do ?what means dnsmaq and how can I configure it ?
I set up gatway in address and netmasq in the interface file and dns in /etc/resolv.conf file but always the same issue. Could you help me ?
Could you please give me details of the config steps to setup my mlunix ?
Regards

[LEONARDO MEIRELES]

Hello guys!

I’m new here.

Someone solved this problem?

I have same problem with conduit mlinux, I can’t access the internet.

Help me, please!

Thanks!

[LEONARDO MEIRELES]

Hello guys!

I solved this problem just add the line:

post-up echo “nameserver 8.8.8.8″ > /etc/resolv.conf

The results are:

PING http://www.google.com (216.58.202.4) 56(84) bytes of data.
64 bytes from gru06s26-in-f4.1e100.net (216.58.202.4): icmp_seq=1 ttl=52 time=11 .8 ms
64 bytes from gru06s26-in-f4.1e100.net (216.58.202.4): icmp_seq=2 ttl=52 time=11 .7 ms

In time that’s ok, but on the other hands, I can’t to access thethingsnetwork server. I don’t known what happend.I try all options about configuration in The Things Network site, but not working!

Help me please!

Cheers!

[rgnews@nisient.com]

Just answering here for people searching how to persist /etc/resolv.conf (always good practice to keep copies of originals):

edit /etc/default/volatiles/00_core, and remove the two lines that symlink and set null contents to /etc/resolv.conf.

edit /etc/default/rcS and set VOLATILE_ENABLE_CACHE=no.

You can now edit /etc/resolv.conf to contain what you want, and it will persist through reboot.

Cheers
Rob

[Author]

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