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override internal DNS FQDN for netbird clients #903

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opened 2025-11-20 05:19:36 -05:00 by saavagebueno · 3 comments
saavagebueno commented 2025-11-20 05:19:36 -05:00
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Originally created by @ez1976 on GitHub (May 17, 2024).

Hello.
when i install a netbird client on a laptop or a server, it has a default hostname.netbird.local domain that works of course.
but since most companies have sub and sub sub domains, the remote user will ping the regular dns fqdn it gets from the local dns and it will resolve to the internal company ip.
it would be best if any netbird agent installed , i can change the internal FQDN hostname that netbird queries so if i am connected to netbird any queries to the servers that has netbird agent, will return the netbird IP with the override FQDN.

BUT... if this is implemented keep in mind that most servers are installed using server keys, so it would be best to add a parameter so we can run the command and specify the override fqdn directly with registering it.

for example:
netbird up --management-url https://my.netbird.domain:33073 --setup-key 'XXXXXXXX' --fqdn "server.it.internal.domain"

the best way (in my opinion) is to use the internal hosts file which is queried before dns.
so the entry should be
100.120.192.26 gitlab-il.it.qwilt.com #netbird manual fqdn

then when the client disconnects, you just remove all entries in the hosts file that has #netbird
that way any netbird clients can use the company's internal fqdn of the server but will access it via netbird's IP

eyalz@eyalz-linux-laptop:$
eyalz@eyalz-linux-laptop:$ ping gitlab-il.remote.qwilt.com
PING gitlab-il.remote.qwilt.com (100.120.192.26) 56(84) bytes of data.
64 bytes from 100.120.192.26 (100.120.192.26): icmp_seq=1 ttl=64 time=98.9 ms
64 bytes from 100.120.192.26 (100.120.192.26): icmp_seq=2 ttl=64 time=98.3 ms
^C
--- gitlab-il.remote.qwilt.com ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1002ms
rtt min/avg/max/mdev = 98.281/98.589/98.898/0.308 ms
eyalz@eyalz-linux-laptop:$ ^C
eyalz@eyalz-linux-laptop:$ ping gitlab-il.it.qwilt.com
PING gitlab-il.it.qwilt.com (10.9.8.76) 56(84) bytes of data.
64 bytes from 10.9.8.76 (10.9.8.76): icmp_seq=1 ttl=62 time=105 ms
64 bytes from 10.9.8.76 (10.9.8.76): icmp_seq=2 ttl=62 time=106 ms
64 bytes from 10.9.8.76 (10.9.8.76): icmp_seq=3 ttl=62 time=106 ms
^C
--- gitlab-il.it.qwilt.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2003ms
rtt min/avg/max/mdev = 105.028/105.532/105.974/0.388 ms
eyalz@eyalz-linux-laptop:~$

Originally created by @ez1976 on GitHub (May 17, 2024). Hello. when i install a netbird client on a laptop or a server, it has a default hostname.netbird.local domain that works of course. but since most companies have sub and sub sub domains, the remote user will ping the regular dns fqdn it gets from the local dns and it will resolve to the internal company ip. it would be best if any netbird agent installed , i can change the internal FQDN hostname that netbird queries so if i am connected to netbird any queries to the servers that has netbird agent, will return the netbird IP with the override FQDN. BUT... if this is implemented keep in mind that most servers are installed using server keys, so it would be best to add a parameter so we can run the command and specify the override fqdn directly with registering it. for example: netbird up --management-url https://my.netbird.domain:33073 --setup-key 'XXXXXXXX' --fqdn "server.it.internal.domain" the best way (in my opinion) is to use the internal hosts file which is queried before dns. so the entry should be 100.120.192.26 gitlab-il.it.qwilt.com #netbird manual fqdn then when the client disconnects, you just remove all entries in the hosts file that has #netbird that way any netbird clients can use the company's internal fqdn of the server but will access it via netbird's IP eyalz@eyalz-linux-laptop:~$ eyalz@eyalz-linux-laptop:~$ ping gitlab-il.remote.qwilt.com PING gitlab-il.remote.qwilt.com (100.120.192.26) 56(84) bytes of data. 64 bytes from 100.120.192.26 (100.120.192.26): icmp_seq=1 ttl=64 time=98.9 ms 64 bytes from 100.120.192.26 (100.120.192.26): icmp_seq=2 ttl=64 time=98.3 ms ^C --- gitlab-il.remote.qwilt.com ping statistics --- 2 packets transmitted, 2 received, 0% packet loss, time 1002ms rtt min/avg/max/mdev = 98.281/98.589/98.898/0.308 ms eyalz@eyalz-linux-laptop:~$ ^C eyalz@eyalz-linux-laptop:~$ ping gitlab-il.it.qwilt.com PING gitlab-il.it.qwilt.com (10.9.8.76) 56(84) bytes of data. 64 bytes from 10.9.8.76 (10.9.8.76): icmp_seq=1 ttl=62 time=105 ms 64 bytes from 10.9.8.76 (10.9.8.76): icmp_seq=2 ttl=62 time=106 ms 64 bytes from 10.9.8.76 (10.9.8.76): icmp_seq=3 ttl=62 time=106 ms ^C --- gitlab-il.it.qwilt.com ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 2003ms rtt min/avg/max/mdev = 105.028/105.532/105.974/0.388 ms eyalz@eyalz-linux-laptop:~$
saavagebueno added the feature-request label 2025-11-20 05:19:36 -05:00
saavagebueno commented 2025-11-20 05:19:37 -05:00
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@mlsmaycon commented on GitHub (May 17, 2024):

Thanks for opening this feature request.

We will discuss it internally and share an estimation soon.

@mlsmaycon commented on GitHub (May 17, 2024): Thanks for opening this feature request. We will discuss it internally and share an estimation soon.
saavagebueno commented 2025-11-20 05:19:37 -05:00
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@ez1976 commented on GitHub (May 17, 2024):

Cool.
Let me know if you want me to give now details or show it live.
Because i am pretty sure this is needed by many

On Fri, May 17, 2024, 17:10 Maycon Santos @.***> wrote:

Thanks for opening this feature request.

We will discuss it internally and share an estimation soon.

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Reply to this email directly, view it on GitHub
https://github.com/netbirdio/netbird/issues/2007#issuecomment-2117928877,
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You are receiving this because you authored the thread.Message ID:
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@ez1976 commented on GitHub (May 17, 2024): Cool. Let me know if you want me to give now details or show it live. Because i am pretty sure this is needed by many On Fri, May 17, 2024, 17:10 Maycon Santos ***@***.***> wrote: > Thanks for opening this feature request. > > We will discuss it internally and share an estimation soon. > > — > Reply to this email directly, view it on GitHub > <https://github.com/netbirdio/netbird/issues/2007#issuecomment-2117928877>, > or unsubscribe > <https://github.com/notifications/unsubscribe-auth/AANTDD3Q4HUIYUJL5OA2WHDZCYTXJAVCNFSM6AAAAABH37I7C2VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDCMJXHEZDQOBXG4> > . > You are receiving this because you authored the thread.Message ID: > ***@***.***> >
saavagebueno commented 2025-11-20 05:19:37 -05:00
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@coconutbird commented on GitHub (Sep 17, 2024):

Did this get any attention to date?

@coconutbird commented on GitHub (Sep 17, 2024): Did this get any attention to date?
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