CLI is not working on 3 Synology NAS

Hello all, 

I am disappointed by the behavior of my 3 Syno NAS. Each one is on different location and IP and they have all the same behavior. 

CLI stay blocked on "activating". I tried so many things, firewall configs, reboots and so more but nothing change.

One time a NAS has managed to connect and be visible on the reporting page but after 2 requests stopped to work.

I don't understand what's happening. i am paying this service who works properly on my Android devices but look not able to work with CLI on Syno devices. Please advise.

Below, the result the diag tool. 

sh-4.4# nextdns status
running
sh-4.4# nextdns log
Mar 28 21:41:32 Andromeda systemd[1]: Started NextDNS DNS53 to DoH proxy..
Mar 28 21:41:32 Andromeda systemd[1]: Starting NextDNS DNS53 to DoH proxy....
Mar 28 21:41:33 Andromeda nextdns[4453]: Starting NextDNS 1.37.10/linux on :53
Mar 28 21:41:33 Andromeda nextdns[4453]: Listening on TCP/:53
Mar 28 21:41:33 Andromeda nextdns[4453]: Starting mDNS discovery
Mar 28 21:41:33 Andromeda nextdns[4453]: Listening on UDP/:53
Mar 28 21:41:38 Andromeda nextdns[4453]: Setting up router
Mar 28 21:41:38 Andromeda nextdns[4453]: Activating
Mar 28 21:46:00 Andromeda systemd[1]: Stopping NextDNS DNS53 to DoH proxy....
Mar 28 21:46:00 Andromeda nextdns[4453]: Received signal: terminated
Mar 28 21:46:00 Andromeda nextdns[4453]: Stopping NextDNS 1.37.10/linux
Mar 28 21:46:00 Andromeda nextdns[4453]: Restore router settings
Mar 28 21:46:00 Andromeda nextdns[4453]: Deactivating
Mar 28 21:46:00 Andromeda nextdns[4453]: NextDNS 1.37.10/linux stopped
Mar 28 21:46:01 Andromeda systemd[1]: Started NextDNS DNS53 to DoH proxy..
Mar 28 21:46:01 Andromeda systemd[1]: Starting NextDNS DNS53 to DoH proxy....
Mar 28 21:46:01 Andromeda nextdns[11713]: Starting NextDNS 1.37.10/linux on :53
Mar 28 21:46:01 Andromeda nextdns[11713]: Listening on TCP/:53
Mar 28 21:46:01 Andromeda nextdns[11713]: Starting mDNS discovery
Mar 28 21:46:01 Andromeda nextdns[11713]: Listening on UDP/:53
Mar 28 21:46:06 Andromeda nextdns[11713]: Setting up router
Mar 28 21:46:06 Andromeda nextdns[11713]: Activating
Mar 28 21:47:26 Andromeda nextdns[11713]: Received signal: terminated
Mar 28 21:47:26 Andromeda systemd[1]: Stopping NextDNS DNS53 to DoH proxy....
Mar 28 21:47:26 Andromeda nextdns[11713]: Stopping NextDNS 1.37.10/linux
Mar 28 21:47:26 Andromeda nextdns[11713]: Restore router settings
Mar 28 21:47:26 Andromeda nextdns[11713]: Deactivating
Mar 28 21:47:26 Andromeda nextdns[11713]: NextDNS 1.37.10/linux stopped
Mar 28 21:47:26 Andromeda systemd[1]: Started NextDNS DNS53 to DoH proxy..
Mar 28 21:47:26 Andromeda systemd[1]: Starting NextDNS DNS53 to DoH proxy....
Mar 28 21:47:26 Andromeda nextdns[12305]: Starting NextDNS 1.37.10/linux on :53
Mar 28 21:47:26 Andromeda nextdns[12305]: Listening on TCP/:53
Mar 28 21:47:26 Andromeda nextdns[12305]: Starting mDNS discovery
Mar 28 21:47:26 Andromeda nextdns[12305]: Listening on UDP/:53
Mar 28 21:47:31 Andromeda nextdns[12305]: Setting up router
Mar 28 21:47:31 Andromeda nextdns[12305]: Activating
sh-4.4# sh -c 'sh -c "$(curl -s https://nextdns.io/diag)"'

Welcome to NextDNS network diagnostic tool.

This tool will download a small binary to capture latency and routing informatio                                     n
regarding the connectivity of your network with NextDNS. In order to perform a
traceroute, root permission is required. You may therefore be asked to provide
your password for sudo.

The source code of this tool is available at https://github.com/nextdns/diag

Do you want to continue? (press enter to accept)
Testing IPv6 connectivity
  available: false
Fetching https://test.nextdns.io
  status: ok
  client: 87.64.172.119
  protocol: UDP
  dest IP: 45.90.28.106
  server: anexia-dxb-1
Fetching PoP name for ultra low latency primary IPv4 (ipv4.dns1.nextdns.io)
  fusa-bru: 34.08ms
Fetching PoP name for ultra low latency secondary IPv4 (ipv4.dns2.nextdns.io)
  zepto-bru: 72.977ms
Fetching PoP name for anycast primary IPv4 (45.90.28.0)
  anexia-dxb: 149.155ms
Fetching PoP name for anycast secondary IPv4 (45.90.30.0)
  anexia-par: 28.077ms
Pinging PoPs
  zepto-ams: 21.598ms
  vultr-fra: 25ms
  netbarista-par: 29ms
  virtua-par: 33ms
  anexia-par: 26.227ms
  vultr-ams: 23.01ms
  fusa-bru: 32.489ms
  anexia-ams: 27.914ms
  anexia-lux: 34.795ms
  zepto-bru: 38.348ms
Traceroute for ultra low latency primary IPv4 (185.18.148.91)
    1       10.0.0.1    5ms   3ms   3ms
    2    192.168.1.1    4ms   4ms   4ms
    3    10.24.97.72   11ms  10ms  12ms
    4                   *     *     *
    5  91.183.242.96   20ms  18ms  18ms
    6 195.219.227.22   18ms  19ms  18ms
    7 195.219.194.153   23ms  21ms  20ms
    8 130.117.15.101   21ms  22ms  22ms
    9   130.117.50.5   22ms  21ms  20ms
   10  154.54.58.198   28ms  29ms  29ms
   11  130.117.2.190   28ms  31ms  28ms
   12    154.25.2.98   30ms  29ms  29ms
   13                   *     *     *
   14                   *     *     *
   15  185.18.148.91   33ms  33ms  34ms
Traceroute for ultra low latency secondary IPv4 (194.110.115.97)
    1       10.0.0.1    3ms   4ms   4ms
    2    192.168.1.1    5ms   4ms   4ms
    3    10.24.97.72   11ms  13ms  14ms
    4                   *     *     *
    5  91.183.242.96   16ms  16ms  18ms
    6                   *     *     *
    7                   *     *     *
    8  80.81.192.165   23ms  23ms  24ms
    9                   *     *     *
   10   82.102.29.43   35ms  34ms  32ms
   11  212.103.51.61   41ms  39ms  38ms
   12                   *     *     *
   13  45.11.107.155   52ms  53ms  49ms
   14 194.110.115.97   48ms  52ms  61ms
Traceroute for anycast primary IPv4 (45.90.28.0)
    1       10.0.0.1    4ms   3ms   5ms
    2    192.168.1.1    4ms   3ms   4ms
    3    10.24.97.72   11ms  11ms  11ms
    4                   *     *     *
    5  91.183.242.96   16ms  21ms  17ms
    6                   *     *     *
    7                   *     *     *
    8  10.246.114.23   32ms  31ms  32ms
    9  10.246.114.65    *    45ms  44ms
   10 10.246.113.206  159ms 158ms 159ms
   11                   *     *     *
   12     45.90.28.0  148ms 147ms 149ms
Traceroute for anycast secondary IPv4 (45.90.30.0)
    1       10.0.0.1   10ms   3ms   6ms
    2    192.168.1.1    9ms  10ms   4ms
    3    10.24.97.72   12ms  11ms  12ms
    4                   *     *     *
    5  91.183.242.96   15ms  16ms  15ms
    6    80.84.23.40   15ms  16ms  15ms
    7                   *     *     *
    8                   *     *     *
    9  10.246.112.86   23ms  23ms  22ms
   10                   *     *     *
   11 213.227.163.32   27ms  28ms  28ms
   12     45.90.30.0   27ms  27ms  26ms

* Posted: https://nextdns.io/diag/4e17a6d0-aed6-11ec-a41a-c7e7f76a00de