Recent posts

#1

General Questions & Suggestions / Updating AAAA records when a d...

Last post by BiloxiGeek - September 06, 2025, 06:42:00 AM

Is there a best practice method for updating multiple AAAA records when/if the /64 prefix delegation I'm getting from AT&T changes? I've read that an A6 record used to be in place for this sort of thing but near as I can tell it's now obsolete.

#2

Questions & Answers / Re: Moved to AT&T Fiber, tunne...

Last post by XQZR - September 05, 2025, 08:46:55 AM

Try https://spin.atomicobject.com/ip-passthrough-bgw210-700/

#3

Questions & Answers / Re: Moved to AT&T Fiber, tunne...

Last post by BiloxiGeek - August 31, 2025, 06:44:09 AM

I've come to the conclusion that AT&T actively blocks all protocol 41 packets upstream from the fiber modem for residential internet. Doesn't seem to be any way around that at least as far as I've found.  I spent an hour or more chatting with support and after finally teaching the tech what 41 is for and why it's needed for 6in4 tunnels they came to the conclusion that's just how the network is and they can't allow the packets through.

Since it's AT&T I suspect that's so they can charge extra by making customers switch to business accounts and/or get static IP setup.

#4

IPv6 on Linux & BSD & Mac / script for automatic tests of ...

Last post by chandro - August 29, 2025, 01:05:37 PM

well, pretty shure many of you have already done all, but for the ones that stills behind, here is a simple script for linux

https://github.com/chandro/henet

it will do the daily tests automatically if you configure it with crontab.

yeah there where many versions, i update it to this one, and is working.

Alex.

#5

Questions & Answers / Moved to AT&T Fiber, tunnel br...

Last post by BiloxiGeek - August 26, 2025, 09:18:00 AM

Recently moved from a cable modem with a tunnel setup that was working to AT&T fiber and now I can't get the tunnel working.  I've put the fiber modem (BGW320) into passthrough mode, disabled the IPv6 and it's firewall.

I got this set this up on a Netgate pfSense appliance (SG2100) and it was working just fine on the cable modem.  I've poked around in the pfSense and I don't see anything that seems to be set differently now or needs to be set differently. Is there something about this fiber modem that will block a tunnel from working?

#6

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

Last post by binnychan - August 19, 2025, 01:28:55 AM

Just found that it is online now.

Thanks for fixing.

#7

Questions & Answers / Alternate routes/BGP

Last post by vitaprimo - August 15, 2025, 04:25:26 PM

While creating a remote gateway on a cloud provider I hadn't used in while, I got sidetracked reading about the services added since last time, specially this BGP service they offer; even if you don't have an ASN of your own, such as it is in the case of a Tunnelbroker range, they can assign a private ASN for you.

I don't know that much about BGP, as much as I try to learn, it fast puts me to sleep, literally. But as I understand provided I have somebody to peer with, I could in theory establish alternate routes than the sole tunnel pathway through which the address space is accessed, correct?

I have zero interest on doing that because the IPv6 space is more useful in my network than it is on a remote firewall that hosts nothing. But I'm still curious, if in the way I think it does, would it work?

One question I got burning in my head is that though they can assign a private ASN, that doesn't negate the fact that the IPv6 range still belongs to an ASN, which I don't have control of, right? As the owner of the range, can HE dictate if additional routes to its space are to be allowed?

Could you break it down in apples and oranges for me? How could alternate routes would, if they could, be established, that is.

Thanks!

#8

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.

#9

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'

#10

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