Custom DNS Not Working (OpenWRT/LEDE Backend)

[Aaron Hamilton]

I'm attempting to incorporate custom DNS entries in a configuration template for LEDE/OpenWrt, but the configuration preview is missing the DNS entries despite them being in the raw JSON.

If someone could point me in the direction of where to look, I could check this out and create a patch for it possibly. I'm very new to OpenWISP and only know the basics, so not sure where the netjson is getting converted to UCI. 

[Federico Capoano]

Hi Aaron and welcome,

could you please send the NetJSON configuration you're mentioning, removing sensitive or not relevant parts?

Federico

On Fri, Sep 14, 2018 at 2:04 AM Aaron Hamilton <aaron.h...@atlaslabs.io> wrote:

I'm attempting to incorporate custom DNS entries in a configuration template for LEDE/OpenWrt, but the configuration preview is missing the DNS entries despite them being in the raw JSON.

If someone could point me in the direction of where to look, I could check this out and create a patch for it possibly. I'm very new to OpenWISP and only know the basics, so not sure where the netjson is getting converted to UCI. 

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[Aaron Hamilton]

Thanks Federico. This is what the netjson config looks like when previewing the template:

{

    "dns_servers": [

        "8.8.8.8",

        "8.8.4.4"

    ]

}

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[Federico Capoano]

In OpenWRT, dns settings are configured at interface level, you need to define some interfaces to make this config effective on OpenWRT.

Eg:

{

    "interfaces": [

       { ...something here... }

    ]

    "dns_servers": [

        "8.8.8.8",

        "8.8.4.4"

    ]

}

(I looked for a different way to implement that but couldn't find one. If anyone has suggestions these are very welcome)

On Fri, Sep 14, 2018 at 10:39 AM Aaron Hamilton <aaron.h...@atlaslabs.io> wrote:

Thanks Federico. This is what the netjson config looks like when previewing the template:

{

    "dns_servers": [

        "8.8.8.8",

        "8.8.4.4"

    ]

}

On Fri, Sep 14, 2018 at 12:11 AM, Federico Capoano <federico...@gmail.com> wrote:

Hi Aaron and welcome,

could you please send the NetJSON configuration you're mentioning, removing sensitive or not relevant parts?

Federico

On Fri, Sep 14, 2018 at 2:04 AM Aaron Hamilton <aaron.h...@atlaslabs.io> wrote:

I'm attempting to incorporate custom DNS entries in a configuration template for LEDE/OpenWrt, but the configuration preview is missing the DNS entries despite them being in the raw JSON.

If someone could point me in the direction of where to look, I could check this out and create a patch for it possibly. I'm very new to OpenWISP and only know the basics, so not sure where the netjson is getting converted to UCI. 

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[Aaron Hamilton]

Thanks Federico. Is there a way to map it to the dnsmasq config file?  For example, the spot I'm hoping to populate is in the file /etc/config/dhcp.  Here's an example of the section:

config dnsmasq

        option domainneeded '1'

        option boguspriv '1'

        option localise_queries '1'

        option rebind_protection '1'

        option rebind_localhost '1'

        option local '/lan/'

        option domain 'lan'

        option expandhosts '1'

        option authoritative '1'

        option readethers '1'

        option leasefile '/tmp/dhcp.leases'

        option resolvfile '/tmp/resolv.conf.auto'

        list server '8.8.8.8'

        list server '8.8.4.4'

On Fri, Sep 14, 2018 at 2:12 AM, Federico Capoano <federico...@gmail.com> wrote:

In OpenWRT, dns settings are configured at interface level, you need to define some interfaces to make this config effective on OpenWRT.

Eg:

{

    "interfaces": [

       { ...something here... }

    ]

    "dns_servers": [

        "8.8.8.8",

        "8.8.4.4"

    ]

}

(I looked for a different way to implement that but couldn't find one. If anyone has suggestions these are very welcome)

On Fri, Sep 14, 2018 at 10:39 AM Aaron Hamilton <aaron.h...@atlaslabs.io> wrote:

Thanks Federico. This is what the netjson config looks like when previewing the template:

{

    "dns_servers": [

        "8.8.8.8",

        "8.8.4.4"

    ]

}

On Fri, Sep 14, 2018 at 12:11 AM, Federico Capoano <federico...@gmail.com> wrote:

Hi Aaron and welcome,

could you please send the NetJSON configuration you're mentioning, removing sensitive or not relevant parts?

Federico

On Fri, Sep 14, 2018 at 2:04 AM Aaron Hamilton <aaron.h...@atlaslabs.io> wrote:

I'm attempting to incorporate custom DNS entries in a configuration template for LEDE/OpenWrt, but the configuration preview is missing the DNS entries despite them being in the raw JSON.

If someone could point me in the direction of where to look, I could check this out and create a patch for it possibly. I'm very new to OpenWISP and only know the basics, so not sure where the netjson is getting converted to UCI. 

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[Federico Capoano]

Yes, go into NetJSON advanced mode, the syntax is explained here:

http://netjsonconfig.openwisp.org/en/latest/backends/openwrt.html#all-the-other-settings

eg:

{
    "dhcp": [
        "config_name": "dnsmasq",
        "config_value": "dnsmasq",
        "domainneeded": true,
        "server": ["8.8.8.8", "8.8.4.4"],
        // etc .....
    ]
}

Fed

[Federico Capoano]

BTW I created an issue for improving the DNS configuration: https://github.com/openwisp/netjsonconfig/issues/117

I think this area can be improved.

If someone can suggest a solution we could create a Google Code-In task to fix this.

Federico