How to diagnose short-term failures on the DNS server (reg.ru)?

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serzhb2014-11-21 11:06:40

Domain Name System

serzhb, 2014-11-21 11:06:40

Hello!
Some time ago, we started receiving complaints from some of our clients that our site is sometimes unavailable, while we do not see any problems on our part - everything works fine. Clients who contact us on this problem use completely different providers, live in different cities.
After a session in teamviewer, it was found that the domain could not be resolved:
ping: cannot resolve consultsystems.ru: Unknown host
Usually it is enough to wait a bit and the domain is restored. Also, everything starts working if we register our domains in hosts directly on the client's computer. But this cannot be called a normal solution to the problem.
We suspect that reg.ru DNS servers sometimes don't return records for our domain. Contacted those several times. reg.ru support, but the answer is the same: "At the moment everything is working - come back when it won't work." Arguments that failures are extremely selective and short-lived were not heard.
Has anyone encountered a similar problem? What means can be used to trace these DNS errors in order to still present them to reg.ru?

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2 answer(s)

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brutal_lobster, 2014-11-21
@brutal_lobster

Not necessarily a problem in reg.ru. Between clients and their servers there is a recursor - for example, a provider or Google.
Are you monitoring the site? Add a script by type to your monitoring:

dig @ns1.reg.ru consultsystems.ru
dig @ns2.reg.ru consultsystems.ru

Or use the trial period of some saas a la https://www.uptrends.com

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Eugene, 2014-11-21
@Nc_Soft

It's very easy to diagnose: don't use their crappy dns, because if you use them, you will have problems.
Take dns from yandex or cloudflare, they are free.