docs: add troubleshooting note for querySrv ECONNREFUSED on Windows

[Ajay-Naik]

What this PR does

Adds a troubleshooting note to docs/connections.md for the
querySrv ECONNREFUSED error when connecting to MongoDB Atlas
using mongodb+srv:// on Windows.

Why

This error affects many developers but is not currently documented
in Mongoose's connection docs. The fix (dns.setServers()) is
scattered across Medium articles and Stack Overflow but has no
official reference.

Root cause: Node.js uses its own DNS resolver (c-ares) which can
fail to resolve SRV records on Windows even when OS DNS works fine.
This was confirmed as a Node.js regression in v24.13.0:
nodejs/node#61453

Fix

Force Node.js to use Google's public DNS at the application level:
const dns = require('dns');
dns.setServers(['8.8.8.8', '8.8.4.4']);

References

• dns: fix Windows SRV ECONNREFUSED regression by correcting c-ares fallback detection nodejs/node#61453
• https://alexbevi.com/blog/2023/11/13/querysrv-errors-when-connecting-to-mongodb-atlas/

[vkarpov15]

I believe this change belongs in the FAQ section faq.md not at the top of the connections docs. Do you think that is reasonable @Ajay-Naik ?

[Ajay-Naik]

That makes sense, @vkarpov15. I'll move it to faq.md. Give me a moment to update the PR.

…

On Sat, 27 Jun 2026 at 01:18, Valeri Karpov ***@***.***> wrote: ***@***.**** commented on this pull request. I believe this change belongs in the FAQ section faq.md not at the top of the connections docs. Do you think that is reasonable @Ajay-Naik <https://github.com/Ajay-Naik> ? — Reply to this email directly, view it on GitHub <#16342?email_source=notifications&email_token=BBFOR7PIF2B3JXWS4WVRCKT5B3HPLA5CNFSNUABKM5UWIORPF5TWS5BNNB2WEL2QOVWGYUTFOF2WK43UKJSXM2LFO4XTINJYGIZTANRTGUZ2M4TFMFZW63VHNVSW45DJN5XKKZLWMVXHJLDGN5XXIZLSL5RWY2LDNM#pullrequestreview-4582306353>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BBFOR7NYE2BDYGOHHB45UTL5B3HPLAVCNFSNUABCKJSXA33TNF2G64TZHM2TSNZYG44TWSLTON2WKOZUG42DIOJXGYZTINFBOYBA> . Triage notifications, keep track of coding agent tasks and review pull requests on the go with GitHub Mobile for iOS <https://github.com/notifications/mobile/ios/BBFOR7JKNS4KZHW2UBX5M2T5B3HPLA5CNFSNUABKM5UWIORPF5TWS5BNNB2WEL2QOVWGYUTFOF2WK43UKJSXM2LFO4XTINJYGIZTANRTGUZ2M4TFMFZW63VHNVSW45DJN5XKKZLWMVXHJKTGN5XXIZLSL5UW64Y> and Android <https://github.com/notifications/mobile/android/BBFOR7ITXJCC6HJFDD3UAWD5B3HPLA5CNFSNUABKM5UWIORPF5TWS5BNNB2WEL2QOVWGYUTFOF2WK43UKJSXM2LFO4XTINJYGIZTANRTGUZ2M4TFMFZW63VHNVSW45DJN5XKKZLWMVXHJLTGN5XXIZLSL5QW4ZDSN5UWI>. Download it today! You are receiving this because you were mentioned.Message ID: ***@***.***>

[Ajay-Naik]

Done, @vkarpov15. Moved it to faq.md. Let me know if you'd like any further changes.

…

On Sat, 27 Jun 2026 at 09:28, AJAY NAIK ***@***.***> wrote: That makes sense, @vkarpov15. I'll move it to faq.md. Give me a moment to update the PR. On Sat, 27 Jun 2026 at 01:18, Valeri Karpov ***@***.***> wrote: > ***@***.**** commented on this pull request. > > I believe this change belongs in the FAQ section faq.md not at the top > of the connections docs. Do you think that is reasonable @Ajay-Naik > <https://github.com/Ajay-Naik> ? > > — > Reply to this email directly, view it on GitHub > <#16342?email_source=notifications&email_token=BBFOR7PIF2B3JXWS4WVRCKT5B3HPLA5CNFSNUABKM5UWIORPF5TWS5BNNB2WEL2QOVWGYUTFOF2WK43UKJSXM2LFO4XTINJYGIZTANRTGUZ2M4TFMFZW63VHNVSW45DJN5XKKZLWMVXHJLDGN5XXIZLSL5RWY2LDNM#pullrequestreview-4582306353>, > or unsubscribe > <https://github.com/notifications/unsubscribe-auth/BBFOR7NYE2BDYGOHHB45UTL5B3HPLAVCNFSNUABCKJSXA33TNF2G64TZHM2TSNZYG44TWSLTON2WKOZUG42DIOJXGYZTINFBOYBA> > . > Triage notifications, keep track of coding agent tasks and review pull > requests on the go with GitHub Mobile for iOS > <https://github.com/notifications/mobile/ios/BBFOR7JKNS4KZHW2UBX5M2T5B3HPLA5CNFSNUABKM5UWIORPF5TWS5BNNB2WEL2QOVWGYUTFOF2WK43UKJSXM2LFO4XTINJYGIZTANRTGUZ2M4TFMFZW63VHNVSW45DJN5XKKZLWMVXHJKTGN5XXIZLSL5UW64Y> > and Android > <https://github.com/notifications/mobile/android/BBFOR7ITXJCC6HJFDD3UAWD5B3HPLA5CNFSNUABKM5UWIORPF5TWS5BNNB2WEL2QOVWGYUTFOF2WK43UKJSXM2LFO4XTINJYGIZTANRTGUZ2M4TFMFZW63VHNVSW45DJN5XKKZLWMVXHJLTGN5XXIZLSL5QW4ZDSN5UWI>. > Download it today! > You are receiving this because you were mentioned.Message ID: > ***@***.***> >

[vkarpov15]

Thanks 👍