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General Discussion => Forum Information & FAQs => Topic started by: Lordy on March 19, 2017, 02:48:24 PM

Title: Wrong IPv6 in DNS
Post by: Lordy on March 19, 2017, 02:48:24 PM

Hello,

I was wondering why the forum was slow for me lately and my Chrome on Mac would always show "Resolving host...".

As I am on an IPv6-enabled connection, Chrome tries to look up both AAAA and A records for forum.mrmoneymustache.com.

Unfortunately, the IPv6 record points to fe80::c4f9:b6ff:fe7a:ed8d and fe80 addresses are not routed (just like 192.168).

Could somebody please fix this? Thanks

Cheers, Lordy

Title: Re: Wrong IPv6 in DNS
Post by: Lordy on March 20, 2017, 10:35:41 AM

This seems to have been fixed in the meantime.

Title: Re: Wrong IPv6 in DNS
Post by: Lordy on March 24, 2017, 01:04:45 PM

I was too optimistic, this issue still persists

Code: [Select]

; <<>> DiG 9.11.0-P2 <<>> forum.mrmoneymustache.com aaaa @8.8.8.8
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 44078
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;forum.mrmoneymustache.com. IN AAAA

;; ANSWER SECTION:
forum.mrmoneymustache.com. 1145 IN AAAA fe80::c4f9:b6ff:fe7a:ed8d

;; Query time: 41 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Fri Mar 24 20:03:30 CET 2017
;; MSG SIZE  rcvd: 82

Title: Re: Wrong IPv6 in DNS
Post by: JLee on March 24, 2017, 01:53:18 PM

I'm not sure why they have ipv6 at all...I am guessing someone enabled it accidentally.

Verified from my DNS server as well:

C:\Users\**>nslookup forum.mrmoneymustache.com
Server:  **
Address:  **

Non-authoritative answer:
Name:    forum.mrmoneymustache.com
Addresses:  fe80::c4f9:b6ff:fe7a:ed8d
          45.55.151.63

Title: Re: Wrong IPv6 in DNS
Post by: arebelspy on March 24, 2017, 05:45:44 PM

Thanks for finding this (and the person who clicked "report to moderators" to bring it to our attention!)

We did do an IPv6 DNS tweak after the server move to make the forum work with certain ISPs, but not sure what issue that caused that you're seeing.

Looking into it.

Title: Re: Wrong IPv6 in DNS
Post by: Lordy on March 25, 2017, 11:13:38 AM

This might not be an issue for most users, since those who are IPv6 enabled will quickly find that the address is not reachable.

My router is an AVM FritzBox however which notices that the address coming back from the DNS is local (fe80::) and it's DNS rebind protection kicks in.
It discards the record it received and lets my client (Chrome on Mac) run into a timeout instead. After the time-out, it tries IPv4 which works fine.

Hope this helps,
  Lordy

Title: Re: Wrong IPv6 in DNS
Post by: Lordy on September 05, 2018, 06:35:53 AM

Bumping as this issue still persists.

The IPv6 address for forum.mrmoneymustache.com in the DNS is still unreachable and makes the forum very slow for users like me, who actually have IPv6 connectivity.

Title: Re: Wrong IPv6 in DNS
Post by: arebelspy on September 11, 2018, 11:37:56 AM

Thanks for following up on this. Bumping it over to the server admin.

Title: Re: Wrong IPv6 in DNS
Post by: arebelspy on September 12, 2018, 08:57:44 AM

The DNS records were cleared.  It may take a few hours to propgate, but it’s likely good to go by now. 

There is no IPv6 address in DNS anymore, so you will automatically be defaulted to the IPv4 address without the delay you were experiencing.

Title: Re: Wrong IPv6 in DNS
Post by: Lordy on September 12, 2018, 09:17:15 AM

Thank you, it has already disappeared at my ISP, making the forum faster to browse.