Recent posts

#1

Questions & Answers / Re: Move tunnel to another com...

Last post by evantkh - January 16, 2026, 07:32:25 AM

So uh, I didn't do anything, and now it works? Sorry for the noise.

@evantkh, thanks for the tip, although I didn't get to try it.

Looks like you need to wait for NAT mapping expiration (for protocol 41) before you can use on another computer.

#2

Questions & Answers / Re: Move tunnel to another com...

Last post by Parodper - January 15, 2026, 06:20:55 AM

So uh, I didn't do anything, and now it works? Sorry for the noise.

@evantkh, thanks for the tip, although I didn't get to try it.

#3

Questions & Answers / Re: Move tunnel to another com...

Last post by evantkh - January 15, 2026, 05:26:56 AM

Try rebooting the router.

#4

Questions & Answers / Move tunnel to another compute...

Last post by Parodper - January 15, 2026, 03:33:23 AM

Hi,

I'm trying to move a tunnel, from one machine (A) to another (B). I set up the 6in4 in B, and removed the tunnel from A, but I can't get B to work. Both machines are in the same LAN, behind NAT. The config is the same in both machines, except for the local endpoint, which is the machine's private IP.

A worked without issue, and if I do a portscan, I can see that A still receives ICMP Request and SYN. ICMP Request from B don't get any response.

I tried unplugging A for a while, using the WAN address, and switching the Client IPv4 Address around, to see if I could invalidate whatever cache there is, but nothing worked.

#5

Questions & Answers / Re: Azure filtering IPv6 reque...

Last post by jon47 - January 05, 2026, 10:08:13 AM

I know I'm late responding, but I had a similar (but possibly different) issue. Something is broken with MTU discovery, and the net result is that azure and microsoft servers often respond in weird ways, if they respond at all.

Check your MTU is correct:  in my case clamping it to fit in the limitations of PPPoE and my home broadband fibre to the cabinet fixed things, and MS servers sprang into life.

Jon

#6

Questions & Answers / Ongoing Support for IPv6 Tunne...

Last post by evantkh - December 29, 2025, 05:41:31 AM

May I know if IPv6 Tunnel Service is likely to continue service in coming months or years (assuming my account is old enough for outgoing SMTP and rDNS)? IPv6 is still not widely adopted in the region I am in...

#7

General Questions & Suggestions / Re: Slave domain not getting f...

Last post by midearth - December 23, 2025, 04:32:59 PM

nevermind... it took 3-4h but it finally did it.

#8

General Questions & Suggestions / Slave domain not getting fetch...

Last post by midearth - December 23, 2025, 04:14:02 PM

My slave domain didn't update after pushing the master, so I removed and re-added it, but now it's not pulling. I can see in my log it gets the domain when I add it, or when i validate it, but it's listed as "last checked: never" after a few hours.

Code Select Expand

23-Dec-2025 17:30:18.438 xfer-out: info: client @0x7fc577d95498 216.218.133.2#35511 (domain.net): transfer of 'domain.net/IN': AXFR ended: 1 messages, 59 records, 1666 bytes, 0.001 secs (1666000 bytes/sec) (serial 1566310281)

#9

Questions & Answers / Re: Are 6in4/SIT tunnels alway...

Last post by kcochran - December 05, 2025, 02:08:14 PM

That is mostly the ideal situation.  Anchor the tunnel on a router, have the router treat the LAN side as native IPv6.  That's why we route a /64 (and optional /48) via the ::2 IP of the tunnel's remote end.

#10

Questions & Answers / Re: Do 6in4/SIT Tunnels run on...

Last post by kcochran - December 05, 2025, 01:57:51 PM

6in4 is simply a IPv6 packet with an IPv4 header stuck on top of it, and the protocol field set to 41.  No TCP, UDP or other header in the middle, so no port information to latch onto.