Protocol oddity

Started by Bill, Jun 12, 2026, 12:11:29

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Bill

I've no idea if this is new or has always been this way, but if I do a basic (IPv4) ping to idnet.com it works perfectly, but with an IPv6 one (ping6) I get "nodename nor servname provided, or not known", suggesting no IPv6 record on the DNS server?

But browsing to idnet.com shows the connection as being being over IPv6... :dunno:

Main DNS is Cloudflare (1.1.1.1) with Google (8.8.8.8) as backup.

Doesn't happen on other sites I've tried and it's not causing any issue that I can see, it just seems odd.
Bill
BQMs-  IPv4  IPv6

nowster

I had a dig (sic.) and:

idnet.com has no IPv6 address

but HTTP connections to it redirect to

www.idnet.com which does.

The redirect is mildly misconfigured:

* Host idnet.com:80 was resolved.
* IPv6: (none)
* IPv4: 212.69.36.50
*   Trying 212.69.36.50:80...
* Established connection to idnet.com (212.69.36.50 port 80) from 192.168.x.x port 38136
* using HTTP/1.x
> GET / HTTP/1.1
> Host: idnet.com
> User-Agent: curl/8.21.0-rc2
> Accept: */*
>
* Request completely sent off
< HTTP/1.1 301 Moved Permanently
< Server: nginx/1.14.1
< Date: Thu, 18 Jun 2026 10:04:32 GMT
< Content-Type: text/html
< Content-Length: 185
< Connection: keep-alive
< Location: https://www.idnet.com//
<


Bill

#2
I should have thought of that, I've come across it (not identical, but similar) on other sites... although I wouldn't know how to check the way you did, I had to ask on those too ;D

Thanks 👍
Bill
BQMs-  IPv4  IPv6