Federated shares working partially

ℹ️ Support
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1
  • Nextcloud Server version (e.g., 29.x.x):
    • 31.0.6
  • Operating system and version (e.g., Ubuntu 24.04):
    • Debian 12 Bookworm
  • Web server and version (e.g, Apache 2.4.25):
    • Apache 2.4.62
  • Reverse proxy and version _(e.g. nginx 1.27.2)
    • N/A
  • PHP version (e.g, 8.3):
    • 8.2.28
  • Is this the first time you’ve seen this error? (Yes / No):
    • Yes
  • When did this problem seem to first start?
    • never worked
  • Installation method (e.g. AlO, NCP, Bare Metal/Archive, etc.)
    • LXC/KVM on Proxmox host
  • Are you using CloudfIare, mod_security, or similar? (Yes / No)
    • No

Summary of the issue you are facing:

I’m facing a problem with Federated Shares.

I have to instances of NC (hosted on the same Proxmox server) :

  • NC-A, in an LXC container. This instance is publicly joinable, and has a valid Let’s Encrypt certificate. Local IP : 192.168.1.244
    Only one account defined, the administrator account.
  • NC-B, in a Qemu/KVM virtual machine. This instance is joinable internally only, self-signed certificate. Local IP : 192.168.1.242
    10 accounts defined

What I want to achieve : sharing several folders from NC-A with users from NC-B.

I added the ‘magic lines’ (sharing.federation.allowSelfSignedCertificates and allow_local_remote_servers) to the config.php file on NC-A to get it working.

I share a folder on NC-A with user1@NC-B/nextcloud (since root folder on NC-B is /nextcloud). I then accept the share on NC-B. So far, everything is working.

On NC-B, navigating to that shared folder, I can create a new directory there (from the Web GUI), but I’m unable to create or upload any file.
Uploading a file takes several minutes, even for a 1 kB files, and the file never shows up in the shared folder. This is logged at that moment :

{"reqId":"GLYm8hlkksLIIh4277Oh","level":2,"time":"2025-06-20T07:50:17+00:00","remoteAddr":"192.168.1.82","user":"denis","app":"no app in context","method":"PUT","url":"/nextcloud/remote.php/dav/files/denis/D%C3%A9p%C3%B4ts%20(2)/dbeaver.ini","message":"error while discovering ocm provider","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:139.0) Gecko/20100101 Firefox/139.0","version":"31.0.6.2","exception":{"Exception":"OCP\\Http\\Client\\LocalServerException","Message":"Host \"192.168.1.244\" (cloud.XXXXXXXX.fr:80) violates local access rules","Code":0,"Trace":[{"file":"/var/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/PrepareBodyMiddleware.php","line":35,"function":"OC\\Http\\Client\\{closure}","class":"OC\\Http\\Client\\DnsPinMiddleware","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/Middleware.php","line":31,"function":"__invoke","class":"GuzzleHttp\\PrepareBodyMiddleware","type":"->"},{"file":"/var/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/RedirectMiddleware.php","line":71,"function":"GuzzleHttp\\{closure}","class":"GuzzleHttp\\Middleware","type":"::","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/Middleware.php","line":66,"function":"__invoke","class":"GuzzleHttp\\RedirectMiddleware","type":"->"},{"file":"/var/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/HandlerStack.php","line":75,"function":"GuzzleHttp\\{closure}","class":"GuzzleHttp\\Middleware","type":"::","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/Client.php","line":333,"function":"__invoke","class":"GuzzleHttp\\HandlerStack","type":"->"},{"file":"/var/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/Client.php","line":169,"function":"transfer","class":"GuzzleHttp\\Client","type":"->"},{"file":"/var/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/Client.php","line":189,"function":"requestAsync","class":"GuzzleHttp\\Client","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/lib/private/Http/Client/Client.php","line":206,"function":"request","class":"GuzzleHttp\\Client","type":"->"},{"file":"/var/www/nextcloud/lib/private/OCM/OCMDiscoveryService.php","line":82,"function":"get","class":"OC\\Http\\Client\\Client","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/apps/files_sharing/lib/External/Storage.php","line":66,"function":"discover","class":"OC\\OCM\\OCMDiscoveryService","type":"->"},{"file":"/var/www/nextcloud/lib/private/Files/Mount/MountPoint.php","line":145,"function":"__construct","class":"OCA\\Files_Sharing\\External\\Storage","type":"->"},{"file":"/var/www/nextcloud/lib/private/Files/Mount/MountPoint.php","line":170,"function":"createStorage","class":"OC\\Files\\Mount\\MountPoint","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/lib/private/Files/Mount/MountPoint.php","line":271,"function":"getStorage","class":"OC\\Files\\Mount\\MountPoint","type":"->"},{"file":"/var/www/nextcloud/lib/private/Files/Config/UserMountCache.php","line":65,"function":"getStorageRootId","class":"OC\\Files\\Mount\\MountPoint","type":"->"},{"file":"/var/www/nextcloud/lib/private/Files/SetupManager.php","line":460,"function":"registerMounts","class":"OC\\Files\\Config\\UserMountCache","type":"->"},{"file":"/var/www/nextcloud/lib/private/Files/Mount/Manager.php","line":75,"function":"setupForPath","class":"OC\\Files\\SetupManager","type":"->"},{"file":"/var/www/nextcloud/lib/private/Files/View.php","line":1419,"function":"find","class":"OC\\Files\\Mount\\Manager","type":"->"},{"file":"/var/www/nextcloud/apps/dav/lib/Connector/Sabre/Directory.php","line":183,"function":"getFileInfo","class":"OC\\Files\\View","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Tree.php","line":95,"function":"getChild","class":"OCA\\DAV\\Connector\\Sabre\\Directory","type":"->"},{"file":"/var/www/nextcloud/apps/dav/lib/Connector/Sabre/LockPlugin.php","line":49,"function":"getNodeForPath","class":"Sabre\\DAV\\Tree","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/event/lib/WildcardEmitterTrait.php","line":89,"function":"getLock","class":"OCA\\DAV\\Connector\\Sabre\\LockPlugin","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":456,"function":"emit","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/var/www/nextcloud/apps/dav/lib/Connector/Sabre/Server.php","line":49,"function":"invokeMethod","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/var/www/nextcloud/apps/dav/lib/Server.php","line":400,"function":"start","class":"OCA\\DAV\\Connector\\Sabre\\Server","type":"->"},{"file":"/var/www/nextcloud/apps/dav/appinfo/v2/remote.php","line":21,"function":"exec","class":"OCA\\DAV\\Server","type":"->"},{"file":"/var/www/nextcloud/remote.php","line":145,"args":["/var/www/nextcloud/apps/dav/appinfo/v2/remote.php"],"function":"require_once"}],"File":"/var/www/nextcloud/lib/private/Http/Client/DnsPinMiddleware.php","Line":138,"message":"error while discovering ocm provider","exception":[],"remote":"https://cloud.XXXXXXXX.fr","CustomMessage":"error while discovering ocm provider"},"id":"685512bb93ddc"}

Creating a file through the Web GUI throws the message : Unable to create file from template, with the following log entry :

{"reqId":"qoHzUCadyJnIeMl7xfDP","level":2,"time":"2025-06-20T07:53:58+00:00","remoteAddr":"192.168.1.82","user":"denis","app":"no app in context","method":"POST","url":"/nextcloud/ocs/v2.php/apps/files/api/v1/templates/create","message":"error while discovering ocm provider","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:139.0) Gecko/20100101 Firefox/139.0","version":"31.0.6.2","exception":{"Exception":"OCP\\Http\\Client\\LocalServerException","Message":"Host \"192.168.1.244\" (cloud.XXXXXXXX.fr:80) violates local access rules","Code":0,"Trace":[{"file":"/var/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/PrepareBodyMiddleware.php","line":35,"function":"OC\\Http\\Client\\{closure}","class":"OC\\Http\\Client\\DnsPinMiddleware","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/Middleware.php","line":31,"function":"__invoke","class":"GuzzleHttp\\PrepareBodyMiddleware","type":"->"},{"file":"/var/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/RedirectMiddleware.php","line":71,"function":"GuzzleHttp\\{closure}","class":"GuzzleHttp\\Middleware","type":"::","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/Middleware.php","line":66,"function":"__invoke","class":"GuzzleHttp\\RedirectMiddleware","type":"->"},{"file":"/var/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/HandlerStack.php","line":75,"function":"GuzzleHttp\\{closure}","class":"GuzzleHttp\\Middleware","type":"::","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/Client.php","line":333,"function":"__invoke","class":"GuzzleHttp\\HandlerStack","type":"->"},{"file":"/var/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/Client.php","line":169,"function":"transfer","class":"GuzzleHttp\\Client","type":"->"},{"file":"/var/www/nextcloud/3rdparty/guzzlehttp/guzzle/src/Client.php","line":189,"function":"requestAsync","class":"GuzzleHttp\\Client","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/lib/private/Http/Client/Client.php","line":206,"function":"request","class":"GuzzleHttp\\Client","type":"->"},{"file":"/var/www/nextcloud/lib/private/OCM/OCMDiscoveryService.php","line":82,"function":"get","class":"OC\\Http\\Client\\Client","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/apps/files_sharing/lib/External/Storage.php","line":66,"function":"discover","class":"OC\\OCM\\OCMDiscoveryService","type":"->"},{"file":"/var/www/nextcloud/lib/private/Files/Mount/MountPoint.php","line":145,"function":"__construct","class":"OCA\\Files_Sharing\\External\\Storage","type":"->"},{"file":"/var/www/nextcloud/lib/private/Files/Mount/MountPoint.php","line":170,"function":"createStorage","class":"OC\\Files\\Mount\\MountPoint","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/lib/private/Files/Mount/MountPoint.php","line":271,"function":"getStorage","class":"OC\\Files\\Mount\\MountPoint","type":"->"},{"file":"/var/www/nextcloud/lib/private/Files/Config/UserMountCache.php","line":65,"function":"getStorageRootId","class":"OC\\Files\\Mount\\MountPoint","type":"->"},{"file":"/var/www/nextcloud/lib/private/Files/SetupManager.php","line":460,"function":"registerMounts","class":"OC\\Files\\Config\\UserMountCache","type":"->"},{"file":"/var/www/nextcloud/lib/private/Files/Mount/Manager.php","line":75,"function":"setupForPath","class":"OC\\Files\\SetupManager","type":"->"},{"file":"/var/www/nextcloud/lib/private/Files/View.php","line":1419,"function":"find","class":"OC\\Files\\Mount\\Manager","type":"->"},{"file":"/var/www/nextcloud/lib/private/Files/Node/Root.php","line":178,"function":"getFileInfo","class":"OC\\Files\\View","type":"->"},{"file":"/var/www/nextcloud/lib/private/Files/Node/LazyFolder.php","line":138,"function":"get","class":"OC\\Files\\Node\\Root","type":"->"},{"file":"/var/www/nextcloud/lib/private/Files/Template/TemplateManager.php","line":152,"function":"get","class":"OC\\Files\\Node\\LazyFolder","type":"->"},{"file":"/var/www/nextcloud/apps/files/lib/Controller/TemplateController.php","line":94,"function":"createFromTemplate","class":"OC\\Files\\Template\\TemplateManager","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php","line":200,"function":"create","class":"OCA\\Files\\Controller\\TemplateController","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php","line":114,"function":"executeController","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/App.php","line":161,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/Route/Router.php","line":307,"function":"main","class":"OC\\AppFramework\\App","type":"::"},{"file":"/var/www/nextcloud/ocs/v1.php","line":49,"function":"match","class":"OC\\Route\\Router","type":"->"},{"file":"/var/www/nextcloud/ocs/v2.php","line":7,"args":["/var/www/nextcloud/ocs/v1.php"],"function":"require_once"}],"File":"/var/www/nextcloud/lib/private/Http/Client/DnsPinMiddleware.php","Line":138,"message":"error while discovering ocm provider","exception":[],"remote":"https://cloud.XXXXXXXX.fr","CustomMessage":"error while discovering ocm provider"},"id":"6855139a7b5f1"}

Did I miss something ?

Web server / Reverse Proxy

The output of your Apache/nginx/system log in /var/log/____:

nothing that seems to be related with the problem

Configuration

Nextcloud

NC-A

{
    "system": {
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": {
            "1": "cloud.XXXXXXXX.fr",
            "0": "192.168.1.244"
        },
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "version": "31.0.6.2",
        "overwrite.cli.url": "http:\/\/cloud.XXXXXXXX.fr",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "mysql.utf8mb4": true,
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "memcache.local": "\\OC\\Memcache\\APCu",
        "log_rotate_size": 268435456,
        "default_phone_region": "FR",
        "skeletondirectory": "",
        "default_language": "fr",
        "maintenance_window_start": 1,
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": 0
        },
        "maintenance": false,
        "defaultapp": "files",
        "sharing.federation.allowSelfSignedCertificates": true,
        "allow_local_remote_servers": true,
        "loglevel": 2
    }
}

NC-B

{
    "system": {
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "192.168.1.242",
            "DebianData"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "version": "31.0.6.2",
        "overwrite.cli.url": "http:\/\/192.168.1.242\/nextcloud",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "mysql.utf8mb4": true,
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "memcache.local": "\\OC\\Memcache\\APCu",
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": 0
        },
        "maintenance": false,
        "maintenance_window_start": 1,
        "theme": "",
        "loglevel": 2,
        "mail_smtpmode": "smtp",
        "mail_sendmailmode": "smtp",
        "default_phone_region": "FR",
        "mail_smtpauthtype": "PLAIN",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "587",
        "app_install_overwrite": [
            "groupfolders"
        ]
    }
}

Apps

NC-A

Enabled:
  - activity: 4.0.0
  - app_api: 5.0.2
  - bruteforcesettings: 4.0.0
  - cloud_federation_api: 1.14.0
  - comments: 1.21.0
  - contactsinteraction: 1.12.0
  - dashboard: 7.11.0
  - dav: 1.33.0
  - federatedfilesharing: 1.21.0
  - federation: 1.21.0
  - files: 2.3.1
  - files_downloadlimit: 4.0.0
  - files_pdfviewer: 4.0.0
  - files_reminders: 1.4.0
  - files_sharing: 1.23.1
  - files_trashbin: 1.21.0
  - files_versions: 1.24.0
  - firstrunwizard: 4.0.0
  - logreader: 4.0.0
  - lookup_server_connector: 1.19.0
  - nextcloud_announcements: 3.0.0
  - notifications: 4.0.0
  - oauth2: 1.19.1
  - password_policy: 3.0.0
  - photos: 4.0.0-dev.1
  - privacy: 3.0.0
  - profile: 1.0.0
  - provisioning_api: 1.21.0
  - recommendations: 4.0.0
  - related_resources: 2.0.0
  - serverinfo: 3.0.0
  - settings: 1.14.0
  - sharebymail: 1.21.0
  - support: 3.0.0
  - survey_client: 3.0.0
  - systemtags: 1.21.1
  - text: 5.0.0
  - theming: 2.6.1
  - twofactor_backupcodes: 1.20.0
  - updatenotification: 1.21.0
  - user_status: 1.11.0
  - viewer: 4.0.0
  - webhook_listeners: 1.2.0
  - workflowengine: 2.13.0
Disabled:
  - admin_audit: 1.21.0
  - circles: 31.0.0 (installed 31.0.0)
  - encryption: 2.19.0
  - files_external: 1.23.0
  - suspicious_login: 9.0.1
  - twofactor_nextcloud_notification: 5.0.0
  - twofactor_totp: 13.0.0-dev.0
  - user_ldap: 1.22.0
  - weather_status: 1.11.0 (installed 1.11.0)

NC-B

Enabled:
  - activity: 4.0.0
  - app_api: 5.0.2
  - bruteforcesettings: 4.0.0
  - circles: 31.0.0
  - cloud_federation_api: 1.14.0
  - comments: 1.21.0
  - contactsinteraction: 1.12.0
  - dashboard: 7.11.0
  - dav: 1.33.0
  - federatedfilesharing: 1.21.0
  - federation: 1.21.0
  - files: 2.3.1
  - files_downloadlimit: 4.0.0
  - files_external: 1.23.0
  - files_pdfviewer: 4.0.0
  - files_reminders: 1.4.0
  - files_sharing: 1.23.1
  - files_trashbin: 1.21.0
  - files_versions: 1.24.0
  - firstrunwizard: 4.0.0
  - groupfolders: 19.1.0
  - logreader: 4.0.0
  - lookup_server_connector: 1.19.0
  - nextcloud_announcements: 3.0.0
  - notifications: 4.0.0
  - oauth2: 1.19.1
  - password_policy: 3.0.0
  - photos: 4.0.0-dev.1
  - privacy: 3.0.0
  - profile: 1.0.0
  - provisioning_api: 1.21.0
  - recommendations: 4.0.0
  - related_resources: 2.0.0
  - serverinfo: 3.0.0
  - settings: 1.14.0
  - sharebymail: 1.21.0
  - survey_client: 3.0.0
  - text: 5.0.0
  - theming: 2.6.1
  - twofactor_backupcodes: 1.20.0
  - updatenotification: 1.21.0
  - user_status: 1.11.0
  - viewer: 4.0.0
  - weather_status: 1.11.0
  - webhook_listeners: 1.2.0
  - workflowengine: 2.13.0
Disabled:
  - admin_audit: 1.21.0
  - contacts: 7.1.3 (installed 7.1.3)
  - encryption: 2.19.0
  - files_rightclick: 0.15.1 (installed 1.6.0)
  - impersonate: 2.0.0 (installed 2.0.0)
  - ransomware_protection: 1.14.0 (installed 1.14.0)
  - richdocuments: 8.7.1 (installed 8.7.1)
  - support: 3.0.0 (installed 1.3.0)
  - suspicious_login: 9.0.1
  - systemtags: 1.21.1 (installed 1.10.0)
  - twofactor_nextcloud_notification: 5.0.0
  - twofactor_totp: 13.0.0-dev.0
  - user_ldap: 1.22.0
2

hey @Dejieres welcome to the Nextcloud community :waving_hand:

assuming NC-B is not certified? without a valid SSL certificate will render that instance almost unusable.

to get both NC-A and NC-B certified consider a reverse proxy for hosting multiple services see 101: Network, domain and DNS

3

Hello scubamuc,

Thanks for your answer.

I just realize that I forgot to mention that SSL is enabled with a self-signed certificate (snakeoil) on NC-B

But, even if the problem comes from there, why does it work for folder creation and fail for file creation or upload ?

4

see here Managing HTTP encryption (HTTPS) · nextcloud-snap/nextcloud-snap Wiki · GitHub

5

OK, this is way too complicated for me… And, if I add over this the shitty Windows webclient, it just becomes impossible.

So, I worked it around by adding a local FTP server, connected as external storage to NC-A and NC-B. This will do the trick :slightly_smiling_face:

Thank you again for your answers

6

Self signed certificate in Nextcloud snap

Important

Generate and use a limited self-signed certificate. This is easier to setup than Let’s Encrypt certificates, but will cause warnings in browsers and due to being very basic won’t work with some applications.

your solution is fine though… but prefer sftp over ftp for added security. the s implies secure and is part of ssh, so if you have ssh installed on your linux server (and LXC containers or VM’s) anyhow, you may as well use sftp for performance and security advantage if that’s an issue for you. otherwise your workaround is fine. you may bump into some concurrency issues, so it may help to force both NC-A and NC-B to regularly scan fies.

see also

and

7

Thanks for the advices :slight_smile:

Yes, I’m aware of sftp. But, since this FTP server is strictly local, no access from outside, I think I’m reasonably safe. It’s only written to by the two NC instances. And no anonymous access allowed neither.

If that service faced the outside, I would at least use FTPS, indeed.

8

would be great if you mark this issue resolved…

9

This setup will essentially be used to drop heavy mails attachments, to come around the 15 MB limit of the mail server. So, I don’t think there will be a heavy traffic. And most of the traffic will be from NC-A to FTP. I guess on-access scan from NC-B will be enough, as the share in NC-A is a file-drop share .

10

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