Tailscale PVT VPN will not work on the plusnet network

[#1]

hi there something very strange is happening on my tailscale VPN i have had this working for a long time flawlessly, but a few days ago i moved my old laptop that is currently my server for my self hosted apps from windows to debian 13 (windows is just pure rubbish now) now i have the latest build and updated it and for some reason if i go to tailscale.com on the browser it refuses to connect even if i go to login.tailscale.com same thing happens this is not just on the  linux debian distro but also on my mac and my phone or tablet when i am on the plusnet network.. as a test if i switched from the LAN to and teather to my iphones mobile data boom it works this is the same on the Linux Debian disto and the mac and phone and tablet and then the VPN comes online as it should so are you blocking VPNs now? especially tailscale its very weird that this is happening i checked my router tp link GE800 and its up to date with the latest firmware and i have disabled the firewall (SIP) so it should work  but alas every time i try to get the VPN or even try to go to tailscale web pages it stops working on the plusnet network its definitely isolated to your network because as soon as and before you say this could be the browser i have tested on Safari Firefox Chrome Brave Opera same thing this is very strange indeed 

[#2]

I am able to access tailscale.com on my plusnet FF connection....   I don't use the plusnet router and have my own router set to use Cloudflare DNS (not plusnet DNS.)

[#3]

i have done some tests on the Debian 13 distro just to make sure here are the results 

Here is a summary of the facts, which strongly suggest a non-standard block by a network device (like the TP-Link router, despite the GUI settings, or the ISP's network):

Basic Connectivity Works: The Debian host can successfully ping Cloudflare's public DNS at 1.1.1.1.

DNS Resolution Works: The host can successfully resolve login.tailscale.com to its correct IP address (e.g., 192.200.0.106), proving DNS is functional.

Targeted Blockage: Any attempt to establish a connection (via ping or the Tailscale daemon) to the resolved IP address of the Tailscale control plane fails with 100% packet loss.

No Host Firewall: All host firewalls (UFW, Gufw, and all iptables chains) are explicitly turned off or flushed to an ACCEPT policy.

No Application Interference: Temporarily stopping Docker did not resolve the issue.

[#4]

same here i don't use the plusnet router never have done i have a tp link Archer GE800 router set to cloudflare's dns i have tested both google and cloudflare's DNS just incase cloudflare's DNS was down but alas the same issue occurs 

[#5]

Here is a summary of the facts, which strongly suggest a non-standard block by a network device (like the TP-Link router, despite the GUI settings, or the ISP's network)

I use a TP-Link router login.tailscale.com in a browser gives me the landing page with the option to sign on.

Targeted Blockage: Any attempt to establish a connection (via ping or the Tailscale daemon) to the resolved IP address of the Tailscale control plane fails with 100% packet loss.

I can ping and use traceroute to login.tailscale.com

When you attempt a connection what does netstat show for the connection attempt?

[#6]

@Dan_the_Van are you on a static IP ? 

I can reach tailscale fine from an IP in the 80.229... block,

@timsansom what the IP range for your current public IP ? ( the first two octets will do to avoid exposing your entire IP ) 

[#7]

@MisterW 

I am also 80.229... block, so yes a static IP