How to add a subdomain on a different droplet/server?

Question

I have 2 servers on which one have wordpress site on root domain “example.com” and i want to open a discourse forum on other server on my subdomain “forum.example.com”. And my root domain is using cloudlflare.

So when i tried to add a dns of forum and pointed it to the new server, it still shows nothing. I dont know why , i know this is somewhat off topic. But please i am trying to figure this out from couple of weeks.

When i visit the forum.example.com, it shows me the cloudflare page but says the host in not working. I also added the subdomain in my digitalocean panel still nothing

Please help!!

Answer 1

bobbyiliev July 26, 2019

Hi,

Can you confirm if you’ve followed these steps here in:

Login to Cloudflare
Use the drop-down menu in the upper left of your screen and click your domain that you want to install the subdomain on.
Click the DNS icon at the top of the screen.
Select A using the drop-down options
Add the subdomain in NAME
Add the IP address of your droplet in the box labeled IPv4 Address.

If you’ve followed those steps note that it might take a while for the DNS cache to clear over the Globe.

Hope that this helps!
Bobby

Reply Report

Cybil July 26, 2019

Yes, i’ve followed all the steps, and even added it in my digitalocean account in the root domain

However, i’ve waited for 1 hr and it still shows the cloudflare screen

Error 521 Ray ID: 4fc6ec4fxxxxxx • 2019-07-26 14:04:30 UTC
Web server is down
Reply Report
Cybil July 26, 2019

I tried to visit the subdomain now… and this is what i got -

Retry for live version :

This page (https://forum.example.com/finish-installation/confirm-email) is currently offline. However, because the site uses Cloudflare’s Always Online™ technology you can continue to surf a snapshot of the site. We will keep checking in the background and, as soon as the site comes back, you will automatically be served the live version. Always Online™ is powered by Cloudflare | Hide this Alert
Reply Report
- bobbyiliev July 26, 2019
  
  Sometimes it could take from 1 to 72 hours for the DNS cache to clear over the Globe. Can you try in a few hours and let me know how it goes?
  
  Also just make sure that the A record for your subdomain name is pointing correctly to the droplet’s IP address.
  
  Regards,
  Bobby
  
  Reply Report
  
  hakufarm July 27, 2019
  
  Disable Cloudflare (orange cloud), then DNS will appear quicker!
  
  Reply Report
  
  Cybil July 27, 2019
  
  Thankyou so much for your effort!!
  It worked!
  
  Reply Report
  
  Cybil July 27, 2019
  
  Thankyou man, you the best!!
  I had to wait for 15 hours to get it working!!
  
  Reply Report
  
  bobbyiliev July 27, 2019
  
  No problem at all! I’m happy to hear that it is all working now!
  
  Regards,
  Bobby
  
  Reply Report
  
  Cybil October 25, 2019
  
  Can you please help me with this
  https://www.digitalocean.com/community/questions/custom-404-not-working-in-my-nginx-droplet-please-help
  
  Reply Report
  
  bobbyiliev October 26, 2019
  
  Hi @Cybil
  
  I can see that someone already replied to your question. Happy to see that you’ve got it sorted!
  
  Regards,
  Bobby
  
  Reply Report
  
  Cybil October 26, 2019
  
  I’ve got one more issue, can you please guide me through this
  
  So I tried htaccess to nginx conf converter.
  
  This is htaccess code
  
  RewriteEngine On RewriteCond %{REQUEST_FILENAME} !-d RewriteCond %{REQUEST_FILENAME}.php -f RewriteRule ^(.*)$ $1.php RewriteRule ^([a-zA-Z0-9\-\_]+)$ index.php?profile=$1 [NC] # Return 404 if original request is .php RewriteCond %{THE_REQUEST} "^[^ ]* .*?\.php[? ].*$" RewriteRule .* - [L,R=404] ErrorDocument 404 http://localhost/folder/404
  
  Nginx conf code
  
  # nginx configuration error_page 404 http://localhost/folder/404; location / { if (!-e $request_filename){ rewrite ^(.*)$ /$1.php; } rewrite ^/([a-zA-Z0-9\-\_]+)$ /index.php?profile=$1; }
  
  Everything seems to work fine but this line doesn’t works
  
  rewrite ^/([a-zA-Z0-9\-\_]+)$ /index.php?profile=$1;
  
  It is for clean url, but it always shows 404 for that.Please help me out with this
  
  Reply Report
  
  bobbyiliev October 26, 2019
  
  Hi @Cybil
  
  The rewrite rule looks correct, what is the CMS that you are using? Maybe you need to add some extra rules.
  
  Regards,
  Bobby
  
  Reply Report
  
  Cybil October 26, 2019
  
  Hey @bobbyiliev
  Im using NO CMS, its a php site, so do you have any idea what rules should I apply?
  
  Reply Report
  
  bobbyiliev October 27, 2019
  
  Hi @Cybil
  
  This would really depend on your PHP code then. For example, I thin that waht the current rewrite rule that you have does is it forwards any request that comes in, to index.php?profile=.
  
  For example if you visit yourdomain.com/contact, this would be forwarded to yourdomain.com/index.php?profile=contact.
  
  Regards,
  Bobby
  
  Reply Report
  
  bobbyiliev October 27, 2019
  
  I would recommend also to take a look at this tool here that would help you generate the correct Nginx config for your exact needs:
  
  https://nginxconfig.io/
  
  Reply Report
  
  Cybil February 16, 2020
  
  Hey can you help me with this, please
  https://www.digitalocean.com/community/questions/how-do-i-set-up-wildcard-domain-on-my-droplet
  
  Reply Report
  
  bobbyiliev February 17, 2020
  
  Hi there @Cybil,
  
  I can see that you’ve already got a reply to this question.
  
  Regards,
  Bobby
  
  Reply Report

Answer 2

Cybil July 26, 2019

Yes, i’ve followed all the steps, and even added it in my digitalocean account in the root domain

However, i’ve waited for 1 hr and it still shows the cloudflare screen

Error 521 Ray ID: 4fc6ec4fxxxxxx • 2019-07-26 14:04:30 UTC
Web server is down
Reply Report
Cybil July 26, 2019

I tried to visit the subdomain now… and this is what i got -

Retry for live version :

This page (https://forum.example.com/finish-installation/confirm-email) is currently offline. However, because the site uses Cloudflare’s Always Online™ technology you can continue to surf a snapshot of the site. We will keep checking in the background and, as soon as the site comes back, you will automatically be served the live version. Always Online™ is powered by Cloudflare | Hide this Alert
Reply Report
- bobbyiliev July 26, 2019
  
  Sometimes it could take from 1 to 72 hours for the DNS cache to clear over the Globe. Can you try in a few hours and let me know how it goes?
  
  Also just make sure that the A record for your subdomain name is pointing correctly to the droplet’s IP address.
  
  Regards,
  Bobby
  
  Reply Report
  
  hakufarm July 27, 2019
  
  Disable Cloudflare (orange cloud), then DNS will appear quicker!
  
  Reply Report
  
  Cybil July 27, 2019
  
  Thankyou so much for your effort!!
  It worked!
  
  Reply Report
  
  Cybil July 27, 2019
  
  Thankyou man, you the best!!
  I had to wait for 15 hours to get it working!!
  
  Reply Report
  
  bobbyiliev July 27, 2019
  
  No problem at all! I’m happy to hear that it is all working now!
  
  Regards,
  Bobby
  
  Reply Report
  
  Cybil October 25, 2019
  
  Can you please help me with this
  https://www.digitalocean.com/community/questions/custom-404-not-working-in-my-nginx-droplet-please-help
  
  Reply Report
  
  bobbyiliev October 26, 2019
  
  Hi @Cybil
  
  I can see that someone already replied to your question. Happy to see that you’ve got it sorted!
  
  Regards,
  Bobby
  
  Reply Report
  
  Cybil October 26, 2019
  
  I’ve got one more issue, can you please guide me through this
  
  So I tried htaccess to nginx conf converter.
  
  This is htaccess code
  
  RewriteEngine On RewriteCond %{REQUEST_FILENAME} !-d RewriteCond %{REQUEST_FILENAME}.php -f RewriteRule ^(.*)$ $1.php RewriteRule ^([a-zA-Z0-9\-\_]+)$ index.php?profile=$1 [NC] # Return 404 if original request is .php RewriteCond %{THE_REQUEST} "^[^ ]* .*?\.php[? ].*$" RewriteRule .* - [L,R=404] ErrorDocument 404 http://localhost/folder/404
  
  Nginx conf code
  
  # nginx configuration error_page 404 http://localhost/folder/404; location / { if (!-e $request_filename){ rewrite ^(.*)$ /$1.php; } rewrite ^/([a-zA-Z0-9\-\_]+)$ /index.php?profile=$1; }
  
  Everything seems to work fine but this line doesn’t works
  
  rewrite ^/([a-zA-Z0-9\-\_]+)$ /index.php?profile=$1;
  
  It is for clean url, but it always shows 404 for that.Please help me out with this
  
  Reply Report
  
  bobbyiliev October 26, 2019
  
  Hi @Cybil
  
  The rewrite rule looks correct, what is the CMS that you are using? Maybe you need to add some extra rules.
  
  Regards,
  Bobby
  
  Reply Report
  
  Cybil October 26, 2019
  
  Hey @bobbyiliev
  Im using NO CMS, its a php site, so do you have any idea what rules should I apply?
  
  Reply Report
  
  bobbyiliev October 27, 2019
  
  Hi @Cybil
  
  This would really depend on your PHP code then. For example, I thin that waht the current rewrite rule that you have does is it forwards any request that comes in, to index.php?profile=.
  
  For example if you visit yourdomain.com/contact, this would be forwarded to yourdomain.com/index.php?profile=contact.
  
  Regards,
  Bobby
  
  Reply Report
  
  bobbyiliev October 27, 2019
  
  I would recommend also to take a look at this tool here that would help you generate the correct Nginx config for your exact needs:
  
  https://nginxconfig.io/
  
  Reply Report
  
  Cybil February 16, 2020
  
  Hey can you help me with this, please
  https://www.digitalocean.com/community/questions/how-do-i-set-up-wildcard-domain-on-my-droplet
  
  Reply Report
  
  bobbyiliev February 17, 2020
  
  Hi there @Cybil,
  
  I can see that you’ve already got a reply to this question.
  
  Regards,
  Bobby
  
  Reply Report

Answer 3

hoangtvdeveloper February 25, 2020

I get a DNS_PROBE_FINISHED_NXDOMAIN error when adding subdomains. Let me ask you what is missing other than adding the A record.

edited by MattIPv4

Reply Report

Cybil February 25, 2020

Hi,
Usually A record is sufficient for a subdomain. For this error I found this article

https://kinsta.com/knowledgebase/dns_probe_finished_nxdomain/

You can check out on it!

edited by MattIPv4
Reply Report
- hoangtvdeveloper February 26, 2020
  
  I tried your way and it was not successful. I think the problem is due to DNS server. Do you have any other solutions to help me? Thanking you
  
  Reply Report

Answer 4

Cybil February 25, 2020

Hi,
Usually A record is sufficient for a subdomain. For this error I found this article

https://kinsta.com/knowledgebase/dns_probe_finished_nxdomain/

You can check out on it!

edited by MattIPv4
Reply Report
- hoangtvdeveloper February 26, 2020
  
  I tried your way and it was not successful. I think the problem is due to DNS server. Do you have any other solutions to help me? Thanking you
  
  Reply Report

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