Recent posts

#21

Questions & Answers / Re: IPV6 tunnel and MTU issue ...

Last post by XQZR - August 09, 2025, 11:09:53 AM

Hopefully I get no large UDP packets.

Don't worry, you usually won't receive oversized UDP packets.

1. Tunnel servers have a default MTU of 1480.
2. HTTP/3 (QUIC), as a common type of UDP traffic, performs PMTU probing. When it receives an ICMPv6 Packet Too Big message or detects packet loss, the HTTP/3 server will reduce the packet size.

#22

Questions & Answers / Re: hongkong ipv6 tunnel serve...

Last post by XQZR - August 05, 2025, 05:57:25 AM

Now the status shows tserv20.hkg1 is down, with reason "hardware failure, no ETR".

Now 'Hardware failure, provisioning replacement.  No ETR'

#23

Questions & Answers / Re: IPV6 tunnel and MTU issue ...

Last post by moeller - August 02, 2025, 05:00:17 AM

Hi XQZR

    Yes setting the MSS lower works. Hopefully I get no large UDP packets.

Thank you
Markus

#24

Questions & Answers / Re: IPV6 tunnel and MTU issue ...

Last post by XQZR - August 01, 2025, 08:22:05 AM

'he-ipv6' interface MTU 1480(def)
Use TCP MSS clamping on router
nftables:

Code Select Expand

        chain forward {
                type filter hook forward priority filter;
                oifname he-ipv6 tcp flags syn tcp option maxseg size set rt mtu
        }


#25

Questions & Answers / can i have more than 5 tunnels...

Last post by chandro - July 31, 2025, 02:41:33 PM

hello i would like to know if there is an option to have more than 5 tunnels, even paying a little bit.

thanks

chandro

#26

Questions & Answers / Re: paris not routing IPv6?

Last post by lmamane - July 29, 2025, 12:44:10 PM

It turns out the tunnelserver works, only my tunnel is affected. The best guess is that something along the route must have started to block protocol 41 :-(

I need to migrate to another solution... Thanks for the stable service for a very long time now, and thanks all the fish!

#27

Questions & Answers / Re: IPV6 tunnel and MTU issue ...

Last post by moeller - July 29, 2025, 04:12:20 AM

Looking at my wireshark capture I am missing the ICMPv6 packet to big message from the HE tunnel endpoint. Can someone from HE confirm they get send ?

Thank you
Markus

#28

Questions & Answers / paris not routing IPv6?

Last post by lmamane - July 28, 2025, 04:42:12 AM

My tunnel over tserv10.par1 / tserv1.par2 seems not to route IPv6 anymore; it shows as "up" on https://tunnelbroker.net/status.php/ It worked this morning and I didn't change anything... Are other users of that tunnel server encountering the same?

I can ping the server tunnel endpoint over IPv4.
I can ping the server tunnel endpoint FROM ANOTHER IPv6 host but NOT from the tunnel.
I cannot ping anything IPv6 over the tunnel, nor the client tunnel endpoint from another IPv6 host.
With tcpdump, I do see IPv4 packets with protocol IPv6 (41) outgoing from my machine to the IPv6 tunnel endpoint, but nothing coming back.

#29

General Questions & Suggestions / Re: Automatic Dynamic AAAA and...

Last post by Kozlov Sergey Aleksandrovitsch - July 27, 2025, 08:16:22 AM

This is a cmd-file that is running in the Windows Scheduler.

#30

General Questions & Suggestions / Re: Automatic Dynamic AAAA and...

Last post by Kozlov Sergey Aleksandrovitsch - July 27, 2025, 08:15:40 AM

powershell .\AAAA_by_Name.ps1