Cannot access Nextcloud AIO locally via <my_domain>.duckdns.org

ℹ️ Support
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1

The Basics

Summary of the issue you are facing:

I set up Nextcloud AIO (v10.4.0) as described here GitHub - nextcloud/all-in-one: 📦 The official Nextcloud installation method. Provides easy deployment and maintenance with most features included in this one Nextcloud instance., albeit with a custom NEXTCLOUD_DATADIR (on a mounted usb hd).

Everything worked flawlessly. I was able to access Nextcloud AIO either in my local network or from another one from serveral devices (like a mobil phone). I then shutdown the server (using systemctl poweroff) because I wanted to copy some files to NEXTCLOUD_DATADIR (the usb drive) from a different computer which has no network access. After copying the files (GitHub - nextcloud/all-in-one: 📦 The official Nextcloud installation method. Provides easy deployment and maintenance with most features included in this one Nextcloud instance.), I restarted my server.

From then on (I guess, I am not 100% sure if I modified something else), I was not able to access the server locally using my_domain.duckdns.org. Instead, I am redirected to 192.168.178.1. What puzzles me even more is that from one PC (in my local network) I am actually able to use my_domain.duckdns.org to access the login screen.

If I am not in my local network, I can access my_domain.duckdns.org to access the login screen.

I know the information given is sparse, I’d gladly provide more.

Configuration

Nextcloud

Output of occ config:list system:

{
    "system": {
        "one-click-instance": true,
        "one-click-instance.user-limit": 100,
        "memcache.local": "\\OC\\Memcache\\APCu",
        "apps_paths": [
            {
                "path": "\/var\/www\/html\/apps",
                "url": "\/apps",
                "writable": false
            },
            {
                "path": "\/var\/www\/html\/custom_apps",
                "url": "\/custom_apps",
                "writable": true
            }
        ],
        "check_data_directory_permissions": false,
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "password": "***REMOVED SENSITIVE VALUE***",
            "port": 6379
        },
        "overwritehost": "*MY_DOMAIN*.duckdns.org",
        "overwriteprotocol": "https",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "localhost",
            "*MY_DOMAIN*.duckdns.org"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "pgsql",
        "version": "30.0.5.1",
        "overwrite.cli.url": "https:\/\/*MY_DOMAIN*.duckdns.org\/",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "maintenance": false,
        "loglevel": 2,
        "log_type": "file",
        "logfile": "\/var\/www\/html\/data\/nextcloud.log",
        "log_rotate_size": 10485760,
        "log.condition": {
            "apps": [
                "admin_audit"
            ]
        },
        "preview_max_x": 2048,
        "preview_max_y": 2048,
        "jpeg_quality": 60,
        "enabledPreviewProviders": {
            "1": "OC\\Preview\\Image",
            "2": "OC\\Preview\\MarkDown",
            "3": "OC\\Preview\\MP3",
            "4": "OC\\Preview\\TXT",
            "5": "OC\\Preview\\OpenDocument",
            "6": "OC\\Preview\\Movie",
            "7": "OC\\Preview\\Krita",
            "0": "OC\\Preview\\Imaginary",
            "23": "OC\\Preview\\ImaginaryPDF"
        },
        "enable_previews": true,
        "upgrade.disable-web": true,
        "mail_smtpmode": "smtp",
        "trashbin_retention_obligation": "auto, 30",
        "versions_retention_obligation": "auto, 30",
        "activity_expire_days": 30,
        "simpleSignUpLink.shown": false,
        "share_folder": "\/Shared",
        "one-click-instance.link": "https:\/\/nextcloud.com\/all-in-one\/",
        "upgrade.cli-upgrade-link": "https:\/\/github.com\/nextcloud\/all-in-one\/discussions\/2726",
        "updatedirectory": "\/nc-updater",
        "maintenance_window_start": 100,
        "allow_local_remote_servers": true,
        "davstorage.request_timeout": 3600,
        "documentation_url.server_logs": "https:\/\/github.com\/nextcloud\/all-in-one\/discussions\/5425",
        "htaccess.RewriteBase": "\/",
        "dbpersistent": false,
        "auth.bruteforce.protection.enabled": true,
        "ratelimit.protection.enabled": true,
        "files_external_allow_create_new_local": false,
        "trusted_proxies": "***REMOVED SENSITIVE VALUE***",
        "preview_imaginary_url": "***REMOVED SENSITIVE VALUE***",
        "preview_imaginary_key": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpauth": 1,
        "mail_sendmailmode": "smtp",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "587",
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "DOMAIN": "*MY_DOMAIN*.duckdns.org"
    }
}

Apps

Enabled:
  - activity: 3.0.0
  - admin_audit: 1.20.0
  - bruteforcesettings: 3.0.0
  - calendar: 5.0.9
  - circles: 30.0.0
  - cloud_federation_api: 1.13.0
  - comments: 1.20.1
  - contacts: 6.1.3
  - contactsinteraction: 1.11.0
  - dashboard: 7.10.0
  - dav: 1.31.1
  - federatedfilesharing: 1.20.0
  - federation: 1.20.0
  - files: 2.2.0
  - files_downloadlimit: 3.0.0
  - files_pdfviewer: 3.0.0
  - files_reminders: 1.3.0
  - files_sharing: 1.22.0
  - files_trashbin: 1.20.1
  - files_versions: 1.23.0
  - firstrunwizard: 3.0.0
  - logreader: 3.0.0
  - lookup_server_connector: 1.18.0
  - nextcloud-aio: 0.7.0
  - nextcloud_announcements: 2.0.0
  - notifications: 3.0.0
  - notify_push: 1.0.0
  - oauth2: 1.18.1
  - password_policy: 2.0.0
  - photos: 3.0.2
  - privacy: 2.0.0
  - provisioning_api: 1.20.0
  - recommendations: 3.0.0
  - related_resources: 1.5.0
  - serverinfo: 2.0.0
  - settings: 1.13.0
  - sharebymail: 1.20.0
  - support: 2.0.0
  - survey_client: 2.0.0
  - systemtags: 1.20.0
  - tasks: 0.16.1
  - text: 4.1.0
  - theming: 2.5.0
  - twofactor_backupcodes: 1.19.0
  - twofactor_totp: 12.0.0-dev
  - user_status: 1.10.0
  - viewer: 3.0.0
  - weather_status: 1.10.0
  - webhook_listeners: 1.1.0-dev
  - workflowengine: 2.12.0
Disabled:
  - app_api: 4.0.5 (installed 4.0.5)
  - encryption: 2.18.0
  - files_external: 1.22.0
  - notes: 4.11.0 (installed 4.11.0)
  - suspicious_login: 8.0.0
  - twofactor_nextcloud_notification: 4.0.0
  - user_ldap: 1.21.0
2

This entry only allows access to your Nextcloud by calling https://MY_DOMAIN.duckdns.org

In this case all requests need to be forwarded over internet to the excternal port of your router, which forwards them to your Nextcloud.

3

Thanks for the answer! However, I am not quite sure what to do with it.

If I try to open https://MY_DOMAIN.duckdns.org, it will not work (but redirect me to 192.168.178.1) while I am connected to my local network (i.e for example using my mobile phone with WLAN or my PC at home with ethernet).

But if I use an external network (e.g. by disabling WIFI on my mobile and using mobile data), I am able to connect.

I am not sure what you are saying (are you actually proposing a solution or is this just an explanation of why things are the way there are?).

Sorry to not be smarter :slight_smile:

4

This sounds like your Router does not support Hairpin NAT… You should be able to fix this via so: GitHub - nextcloud/all-in-one: 📦 The official Nextcloud installation method. Provides easy deployment and maintenance with most features included in this one Nextcloud instance.

5

@szaimen: first of all thank for your support (to all, not only me), I came across very helpful posts from you a lot.

I already saw and read the document you posted. I am not sure if this exactly tackles my problem.

My main concern is that my setup already worked at some point and broke at some time. As I mentioned, I added files manually, following GitHub - nextcloud/all-in-one: 📦 The official Nextcloud installation method. Provides easy deployment and maintenance with most features included in this one Nextcloud instance.

There the following is noted:
ATTENTION : be very careful when doing so because you might corrupt your AIO installation!

However, I am not sure if this could have broken my setup.

6

I finally found the problem, which wasn’t related to Nextcloud at all. I had changed the way DuckDNS updates in my router and mistakenly specified an IPv6 address that should have been left blank

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7

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