Congratulations, you have connected to a server that will display your method of connection, either IPv6 (preferred) or IPv4 (old and crusty). Well IPv6 is already older than 20 years but not as old as IPv4 ;)

Nevertheless, please choose your destiny: If your browser times-out when trying to connect to this server then you do not have an IPv6 or IPv4 path (depends on which test you are running) to the server. If your browser returns an error that the host cannot be found then the DNS servers you are using are unable to resolve the AAAA or A DNS record (depends on which test you are running again) for the server. If your browser is able to connect to the "IPv6 Only Test", yet using the "IPv6 & IPv4 Test" returns a page stating you are using IPv4, then your browser and/or IP stack in your machine are preferring IPv4 over IPv6. It also might be that your operating system supports IPv6 but your web-browser doesn't.

IPv6 & IPv4 Test Results:

You are using IPv4
Client address: 54.163.61.66
Server address: 78.46.80.70
DNS server address: 192.168.0.15 (internal)

Client address reverse DNS lookup:
Using domain server:
Name: 192.168.0.15
Address: 192.168.0.15#53
Aliases: 

Host 66.61.163.54.in-addr.arpa not found: 5(REFUSED)

Server address reverse DNS lookup:
Using domain server:
Name: 192.168.0.15
Address: 192.168.0.15#53
Aliases: 

Host 70.80.46.78.in-addr.arpa not found: 5(REFUSED)

Server hostname DNS lookup:
Using domain server:
Name: 192.168.0.15
Address: 192.168.0.15#53
Aliases: 

ipv6.buetow.org is an alias for web.ian.snonux.org.
web.ian.snonux.org has address 78.46.80.70
web.ian.snonux.org has IPv6 address 2a01:4f8:120:30e8::11

Advanced client address reverse DNS lookup:

; <<>> DiG 9.11.0-P3 <<>> -x 54.163.61.66 @192.168.0.15
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: REFUSED, id: 6603
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;66.61.163.54.in-addr.arpa.	IN	PTR

;; Query time: 0 msec
;; SERVER: 192.168.0.15#53(192.168.0.15)
;; WHEN: Tue Dec 12 06:39:40 UTC 2017
;; MSG SIZE  rcvd: 54


Advanced server address reverse DNS lookup:

; <<>> DiG 9.11.0-P3 <<>> -x 78.46.80.70 @192.168.0.15
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: REFUSED, id: 39532
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;70.80.46.78.in-addr.arpa.	IN	PTR

;; Query time: 0 msec
;; SERVER: 192.168.0.15#53(192.168.0.15)
;; WHEN: Tue Dec 12 06:39:40 UTC 2017
;; MSG SIZE  rcvd: 53


Advanced server hostname DNS lookup:

; <<>> DiG 9.11.0-P3 <<>> -t any ipv6.buetow.org @192.168.0.15
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 34699
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 5
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;ipv6.buetow.org.		IN	ANY

;; ANSWER SECTION:
ipv6.buetow.org.	86400	IN	CNAME	web.ian.snonux.org.

;; AUTHORITY SECTION:
buetow.org.		3600	IN	NS	name1.snonux.org.
buetow.org.		3600	IN	NS	name2.snonux.org.

;; ADDITIONAL SECTION:
name1.snonux.org.	86400	IN	A	78.46.80.70
name2.snonux.org.	86400	IN	A	164.177.171.32
name1.snonux.org.	86400	IN	AAAA	2a01:4f8:120:30e8::15
name2.snonux.org.	86400	IN	AAAA	2a03:2500:1:6:20::

;; Query time: 0 msec
;; SERVER: 192.168.0.15#53(192.168.0.15)
;; WHEN: Tue Dec 12 06:39:40 UTC 2017
;; MSG SIZE  rcvd: 201


Thanks for visiting, please recommend this test to your friends and colleagues. Any comments go to Paul Buetow.