Nextcloud AIO queries DNS server every few seconds

[jlmanohar]

Any one have any idea why or if its normal that i see lots of DNS requests for my domain that nextcloud is on (cloud.xxxxxxx.org). I am using debian 12, with portainer and have used the example docker compose file to create the stack, i use nginx proxy manager for reverse proxy and followed the setup guide for reverse proxy. I have ipv6 enabled in docker and followed the respective aio guide to setup network and ipv6 tables.

I am using Adguard home a local dns and have written my ip to do a dns rewrite for a, aaaa records. I dont see anything wrong with nextcloud functionality, just too many dns requests ~13-14k per day. All of those come from the docker bridge network.

[jlmanohar]

Followup information, i see .example.org as some of the dns request. Could it be that its something left from test ?

[szaimen]

Hi, most likely the healthcheck is the reason

all-in-one/Containers/apache/healthcheck.sh

Line 6 in 1771a72

nc -z "$NC_DOMAIN" 443 || exit 1

[jlmanohar]

Thanks, i just added them to the ignore list for my logs and statistics of adguard dns.

[jlmanohar]

Any idea on the example.org getting appended on some requests ? i don't see it in the nc_domain env var