DNS - routing domain - broken link

Help! (Home for newbies)
1

Operating system: Unbutu Linux 20.04.2
OS version: Webmin 1.962, Virtualmin 6.14, Usermin 1.812

Operating system: Unbutu Linux 20.04.2
OS version: Webmin 1.962, Virtualmin 6.14, Usermin 1.812

Hy to everybody,

Thank you for great tool. I am newbie in Linux and servers. I have a basic question for which I cannot find easy answer, so please help.

I have a problem with domains or. domain security and broken links. I tried to make better security to set up SSL and check how email are working. I see that I have successfully route domains to my computer, but in the middle something is not working as it should DNS records.

WHAT HAVE I DONE:
I have successfully set up my server and routed domains to my server. From domain provider I have routed my domains to computer. This server is accessible thru subdomain.my1domain.com. Which has been directed thru A record to IP of my computer.

After I have created 3 different domains:

  1. First domain was create on name.com and then directed by NS name servers to hosting company. Because in hosting I can direct domain to IP. At hosting company I have written 3 A records:
  1. Second and third domains I have created at freenom.com, but here I had possibility from provider directly write IP of my computer, so that is all.

After I have created 3 different virtual server for each domain in Virtualmin. For domain from name.com I could even create Let’s Encrypt SSL certificate. For tk domain is Let’s Encrypt always reporting error when creating.

Because of this I tried to check
https://secure.fraudmarc.com
I get an error:
DNS error: no such host

If I am checking thru https://www.whatsmydns.net/ I see that this web page can only read A records and NS records. Both of these records are provided from other servers, not mine. But records of DNS which are on my server are not accesible in visible.

I can see that Virtualmin has created many more DNS records (dmarc, SPF, mail….) which are not accessible to the internet.

How can I solve that DNS records from my side will work as they should?

Thank you all for reply,

Miha

2

Hi Miha
You can check if your DNS works correctly using bind tools
dig www.domain.com @your_DNS

To check which DNS is responsible for your domain, simply use
whois domain.com

regards
Dimitar

3

Yes, the guilty party was my DNS.

I did not know, how exactly the work. After I managed my DNS records on the side of my server subdomain. I went to my provider of first domain where I had created subdomain which pointed to my server, everything started to work. No more NX error and failed certificate.

For my server I have then created two subdomains in created this records:

ns1.mydomain.eu. 14400 IN A “my IP”
ns2.mydomain.eu. 14400 IN A “my IP”
www.ns1.mydomain.eu. 14400 IN CNAME ns1.mydomain.eu
www.ns2.mydomain.eu. 14400 IN CNAME ns2.mydomain.eu
webmail.mydomain.eu. 14400 IN A “my IP”
webmail.mydomain.eu. 14400 IN A “my IP”
mail.ns1.mydomain.eu. 14400 IN CNAME ns1.mydomain.eu
mail.ns2.mydomain.eu. 14400 IN CNAME ns2.mydomain.eu
ns1.mydomain.eu. 14400 IN MX Priority: 0 Destination: ns1.mydomain.eu
ns2.mydomain.eu. 14400 IN MX Priority: 0 Destination: ns2.mydomain.eu

Then on Virtualmin:

  • VIRTUALMIN – DomainKeys Identified Mail – INSTALL NOW
  • enable Greylisting

Webmin:

  • under BIND DNS enable DNSSEC and RNDC

Waited almost two days on web page:

and other pages that DNS refreshed.

And after everything started to work.

4

This topic was automatically closed 60 days after the last reply. New replies are no longer allowed.