DNS resolver errors with Gluetun connection refused #262

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saavagebueno · 2025-11-20T04:22:08-05:00

saavagebueno commented

2025-11-20 04:22:08 -05:00

Originally created by @jimpapi on GitHub (Mar 2, 2023).

i use PIA VPN in my synology (docker)
i succesfully managed to install gluetun to connect to pia and get ip and open port for 61 days
i tried to update my ddns server (afraid.org) by installing ddns-updater in my docker with the ip from gluetun
(network_mode: "container:gluetun") in my ddns-updater docker .yaml file
but the problems i found:

1)conflicting ports in healthcheck server (127.0.0.1:9999) of ddns--updater and web port 8000
so i changed the ports in ddns-updater settings :
a) [healthcheck server] listening on 127.0.0.1:9995
b) [http server] listening on :8003

but I get errors on resolving dns:

WARN obtaining ipv4 address: try 1 of 3: Get "http://ip1.dynupdate.no-ip.com": dial tcp: lookup ip1.dynupdate.no-ip.com on 127.0.0.1:53: read udp 127.0.0.1:41398->127.0.0.1:53: read: connection refused

and goes on refusing all dns connections.

i have tried a lot of things but nothing worked.
Any ideas please?
i suppose it's a kind of conflicting servers but every time i changed the 127.0.0.1 to something else didn't work!

Thanks in advance!

Is this urgent: Yes
Running version latest built on 2020-03-13T01:30:06Z (commit d0f678c)
What are you using to run the container: docker-compose
Extra information (optional)

Logs:

Configuration file (remove your credentials!):

version: "3.7"
services:
  ddns-updater:
    image: qmcgaw/ddns-updater
    container_name: ddns-updater
    network_mode: "container:gluetun"
  
    volumes:
      - /volume1/docker/updater/data:/updater/data
    environment:
      - CONFIG=
      - PERIOD=5m
      - UPDATE_COOLDOWN_PERIOD=5m
      - PUBLICIP_FETCHERS=all
      - PUBLICIP_HTTP_PROVIDERS=all
      - PUBLICIPV4_HTTP_PROVIDERS=all
      - PUBLICIPV6_HTTP_PROVIDERS=all
      - PUBLICIP_DNS_PROVIDERS=all
      - PUBLICIP_DNS_TIMEOUT=3s
      - HTTP_TIMEOUT=10s
      
      # Web UI
      - LISTENING_PORT=8003
      - ROOT_URL=/
      - HEALTH_SERVER_ADDRESS=127.0.0.1:9995
      # Backup
      - BACKUP_PERIOD=0 # 0 to disable
      - BACKUP_DIRECTORY=/updater/data

      # Other
      - LOG_LEVEL=info
      - LOG_CALLER=hidden
      - SHOUTRRR_ADDRESSES=
    restart: always

Originally created by @jimpapi on GitHub (Mar 2, 2023). i use PIA VPN in my synology (docker) i succesfully managed to install gluetun to connect to pia and get ip and open port for 61 days i tried to update my ddns server (afraid.org) by installing ddns-updater in my docker with the ip from gluetun (network_mode: "container:gluetun") in my ddns-updater docker .yaml file but the problems i found: 1)conflicting ports in healthcheck server (127.0.0.1:9999) of ddns--updater and web port 8000 so i changed the ports in ddns-updater settings : a) [healthcheck server] listening on 127.0.0.1:9995 b) [http server] listening on :8003 but I get errors on resolving dns: ``` WARN obtaining ipv4 address: try 1 of 3: Get "http://ip1.dynupdate.no-ip.com": dial tcp: lookup ip1.dynupdate.no-ip.com on 127.0.0.1:53: read udp 127.0.0.1:41398->127.0.0.1:53: read: connection refused ``` and goes on refusing all dns connections. i have tried a lot of things but nothing worked. Any ideas please? i suppose it's a kind of conflicting servers but every time i changed the 127.0.0.1 to something else didn't work! Thanks in advance! 1. Is this urgent: Yes 2. Running version latest built on 2020-03-13T01:30:06Z (commit d0f678c) 4. What are you using to run the container: docker-compose 5. Extra information (optional) Logs: ```log ``` Configuration file (**remove your credentials!**): ```yml version: "3.7" services: ddns-updater: image: qmcgaw/ddns-updater container_name: ddns-updater network_mode: "container:gluetun" volumes: - /volume1/docker/updater/data:/updater/data environment: - CONFIG= - PERIOD=5m - UPDATE_COOLDOWN_PERIOD=5m - PUBLICIP_FETCHERS=all - PUBLICIP_HTTP_PROVIDERS=all - PUBLICIPV4_HTTP_PROVIDERS=all - PUBLICIPV6_HTTP_PROVIDERS=all - PUBLICIP_DNS_PROVIDERS=all - PUBLICIP_DNS_TIMEOUT=3s - HTTP_TIMEOUT=10s # Web UI - LISTENING_PORT=8003 - ROOT_URL=/ - HEALTH_SERVER_ADDRESS=127.0.0.1:9995 # Backup - BACKUP_PERIOD=0 # 0 to disable - BACKUP_DIRECTORY=/updater/data # Other - LOG_LEVEL=info - LOG_CALLER=hidden - SHOUTRRR_ADDRESSES= restart: always ```

saavagebueno added the Status: 🗯️ Waiting for feedback Closed: ⚰️ Inactive Category: Config problem 📝 labels 2025-11-20 04:22:08 -05:00

saavagebueno closed this issue

2025-11-20 04:22:08 -05:00

saavagebueno commented

2025-11-20 04:22:08 -05:00

@qdm12 commented on GitHub (Jun 12, 2023):

Maybe try setting RESOLVER_ADDRESS=127.0.0.1? And if this doesn't work, try changing it to i.e. 1.1.1.1?

@qdm12 commented on GitHub (Jun 12, 2023): Maybe try setting `RESOLVER_ADDRESS=127.0.0.1`? And if this doesn't work, try changing it to i.e. `1.1.1.1`?

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Reference: starred/ddns-updater#262

DNS resolver errors with Gluetun connection refused #262

DNS resolver errors with Gluetun `connection refused` #262