Question

Hello,

On TRB255 using FW : TRB2_R_00.07.02.7_WEBUI, is DNS forwarding from Telco enabled by default ? If not how to enable it ?

Thanking in advance,

Answer 1

Hi,

Thanks for reaching us, hope to serve you well.

Kindly check the link below regarding the DNS service in TRB255.

TRB255 DNS - Teltonika Networks Wiki (teltonika-networks.com)

If you didn't find what you need, kindly specify what exactly you want.

Comments

DNS are being provided by TELCO when using DHCP mode.

I would like to configure the device connected to receive either the DNS address on the WAN connection or the IP address of the TRB255 ( same as gateway).

I do not want to enter a DNS manually ex 8.8.8.8.

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DNS server IP addresses can be passed to hosts on a network by adding options to LAN interface DHCP settings. 

Navigate to Network -> LAN section. Under DHCP server section, select Advanced Settings tab. There you need to set 6, 10.10.10.1 in DHCP options.

6 stands for DNS server.

Below are a couple of CLI/SSH options that could also be used to modify DNS forwardings:

• file /etc/config/network
  • A dns_metric option can be added to prioritize DNS servers. 0 means highest priority. For example:

config interface 'wan'
  option dns_metric '100'

• file /etc/config/dhcp
  • you can add strictorder option, meaning that then servers will be used one by one as ordered in resolv file. Example:

config dnsmasq
  option strictorder '1'

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Thanks a lot,

Is it always 10.10.10.1 whatever the IP config ?

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10.10.10.1 is simply an example, if that is what you are asking. Replace it with your address. Aside from that, this value should be preferred over what is provided by ISP.