Transmission torrent not starting since RAIDiator 4.2.28

[Rembo]

SInce I've upgraded my ReadyNAS Ultra 4 Plus to RAIDiator 4.2.28 last weekend the torrents are not starting anymore.

I have tried to reinstall Transmission 2.82 and to downgrade to RAIDiator 4.2.27 without result.

The torrents are stuck with the following status:

Tier 1

• udp://tracker.publicbt.com:80
• Announce error: Connection failed - Today 07:45:31 PM
  Next announce in 57 minutes
  Scrape error: Connection failed - Today 08:30:22 PM

Seeders:	N/A
Leechers:	N/A
Downloads:	N/A

Tier 2

• udp://open.demonii.com:1337
• Announce error: Connection failed - Today 08:30:57 PM
  Next announce in 1 hour, 43 minutes
  Scrape error: Connection failed - Today 07:50:21 PM

Seeders:	N/A
Leechers:	N/A
Downloads:	N/A

It's not a problem with my router, firewall or ISP because Transmission has no problem with the same torrents on my Mac which is on the same subnet.

Any suggestion ?

[StephenB]

Is the NAS using dhcp or a static address?

If dhcp- were you forwarding ports for transmission in the router?  If so, did the local address change?

if static - you might want to check that your subnet and dns settings are still correct.

[Rembo]

I'm using static DHCP and my DNS are looking like that with IPv6 first:

RNU4P:~# cat /etc/resolv.conf

nameserver 2001:4860:4860::8888

nameserver 2001:4860:4860::8844

nameserver 192.168.1.1

nameserver 213.221.144.240

nameserver 213.221.143.240

RNU4P:~#

As on my Mac it's IPv4 first:

nameserver 192.168.1.1

nameserver 213.221.144.240

nameserver 213.221.143.240

nameserver 2001:4860:4860::8888

nameserver 2001:4860:4860::8844

[StephenB]

Does anything change if you disable IPv6 on the NAS?

[Rembo]

I've tried IPv4 only and it's the same, but setting the port on the NAS from 51413 to 61200 like it's on my Mac made it work.

Both ports are normally not forwarded on my router, even opening 51413 (and testing it from outside) didn't improve anything, I don't know why 51413 stopped working after years.

Anyway, thanks for helping me.

[Rembo]

Further testing, it seems that it's activating DHT to find more peers who did the job, before I had only PEX activated.