On the other hand, Fedora Core 23 has is enabled by default. So, it should not be too difficult to support it in Ubuntu as well.
Fedora Core 23:
[root@queenstown ~]# host bjørvika.uio.nornet
bjørvika.uio.nornet is an alias for bjoervika.uninett.uio.nornet.
bjoervika.uninett.uio.nornet has address 10.1.2.100
bjoervika.uninett.uio.nornet has IPv6 address (address removed)
[root@queenstown ~]# nslookup bjørvika.uio.nornet
Server: 10.1.1.1
Address: 10.1.1.1#53
bjørvika.uio.nornet canonical name = bjoervika.uninett.uio.nornet.
Name: bjoervika.uninett.uio.nornet
Address: 10.1.2.100
[root@queenstown ~]# ping -c1 bjørvika.uio.nornet
PING bjoervika.uninett.uio.nornet (10.1.2.100) 56(84) bytes of data.
64 bytes from bjoervika.uninett.uio.nornet (10.1.2.100): icmp_seq=1 ttl=62 time=3.84 ms
--- bjoervika.uninett.uio.nornet ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 3.844/3.844/3.844/0.000 ms
[root@queenstown ~]# ping6 -c1 bjørvika.uio.nornet
PING bjørvika.uio.nornet(bjoervika.uninett.uio.nornet) 56 data bytes
64 bytes from bjoervika.uninett.uio.nornet: icmp_seq=1 ttl=62 time=5.67 ms
--- bjørvika.uio.nornet ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 5.673/5.673/5.673/0.000 ms
[root@queenstown ~]# dig bjørvika.uio.nornet any
; <<>> DiG 9.10.3-P4-RedHat-9.10.3-12.P4.fc23 <<>> bjørvika.uio.nornet any
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 62089
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 3
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;bjørvika.uio.nornet. IN ANY
;; ANSWER SECTION:
bjørvika.uio.nornet. 86400 IN CNAME bjoervika.uninett.uio.nornet.
;; AUTHORITY SECTION:
uio.nornet. 86400 IN NS ns.simula.nornet.
uio.nornet. 86400 IN NS blindern.uninett.uio.nornet.
;; ADDITIONAL SECTION:
blindern.uninett.uio.nornet. 86400 IN A 10.1.2.1
blindern.uninett.uio.nornet. 86400 IN AAAA (address removed)
;; Query time: 1 msec
;; SERVER: 10.1.1.1#53(10.1.1.1)
;; WHEN: to. mai 12 13:59:19 CEST 2016
;; MSG SIZE rcvd: 178
IDN support would be really nice to have. Unfortunately, not even Ubuntu 16.04 has it yet:
Ubuntu 16.04 (Xenial Xerus):
nornetpp@ experiment: ~$ host bjørvika.uio.nornet experiment: ~$ nslookup bjørvika.uio.nornet
Host bjørvika.uio.nornet not found: 3(NXDOMAIN)
nornetpp@
Server: 10.1.1.1
Address: 10.1.1.1#53
** server can't find bj\195\ 184rvika. uio.nornet: NXDOMAIN
nornetpp@ experiment: ~$ ping bjørvika.uio.nornet experiment: ~$ ping6 bjørvika.uio.nornet experiment: ~$ dig bjørvika.uio.nornet
ping: unknown host bjørvika.uio.nornet
nornetpp@
unknown host
nornetpp@
; <<>> DiG 9.10.3-P4-Ubuntu <<>> bjørvika.uio.nornet
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 61159
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1
;; OPT PSEUDOSECTION: 184rvika. uio.nornet. IN A
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;bj\195\
;; AUTHORITY SECTION: uninett. uio.nornet. root.uio.nornet. 57669665 900 60 84600 3600
uio.nornet. 3600 IN SOA blindern.
;; Query time: 1 msec 1#53(10. 1.1.1)
;; SERVER: 10.1.1.
;; WHEN: Thu May 12 13:56:07 CEST 2016
;; MSG SIZE rcvd: 107
On the other hand, Fedora Core 23 has is enabled by default. So, it should not be too difficult to support it in Ubuntu as well.
Fedora Core 23:
[root@queenstown ~]# host bjørvika.uio.nornet uninett. uio.nornet. uninett. uio.nornet has address 10.1.2.100 uninett. uio.nornet has IPv6 address (address removed)
bjørvika.uio.nornet is an alias for bjoervika.
bjoervika.
bjoervika.
[root@queenstown ~]# nslookup bjørvika.uio.nornet
Server: 10.1.1.1
Address: 10.1.1.1#53
bjørvika.uio.nornet canonical name = bjoervika. uninett. uio.nornet. uninett. uio.nornet
Name: bjoervika.
Address: 10.1.2.100
[root@queenstown ~]# ping -c1 bjørvika.uio.nornet uninett. uio.nornet (10.1.2.100) 56(84) bytes of data. uninett. uio.nornet (10.1.2.100): icmp_seq=1 ttl=62 time=3.84 ms
PING bjoervika.
64 bytes from bjoervika.
--- bjoervika. uninett. uio.nornet ping statistics --- 844/3.844/ 0.000 ms uio.nornet( bjoervika. uninett. uio.nornet) 56 data bytes uninett. uio.nornet: icmp_seq=1 ttl=62 time=5.67 ms
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 3.844/3.
[root@queenstown ~]# ping6 -c1 bjørvika.uio.nornet
PING bjørvika.
64 bytes from bjoervika.
--- bjørvika.uio.nornet ping statistics --- 673/5.673/ 0.000 ms
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 5.673/5.
[root@queenstown ~]# dig bjørvika.uio.nornet any
; <<>> DiG 9.10.3- P4-RedHat- 9.10.3- 12.P4.fc23 <<>> bjørvika.uio.nornet any
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 62089
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 3
;; OPT PSEUDOSECTION: uio.nornet. IN ANY
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;bjørvika.
;; ANSWER SECTION: uio.nornet. 86400 IN CNAME bjoervika. uninett. uio.nornet.
bjørvika.
;; AUTHORITY SECTION: uninett. uio.nornet.
uio.nornet. 86400 IN NS ns.simula.nornet.
uio.nornet. 86400 IN NS blindern.
;; ADDITIONAL SECTION: uninett. uio.nornet. 86400 IN A 10.1.2.1 uninett. uio.nornet. 86400 IN AAAA (address removed)
blindern.
blindern.
;; Query time: 1 msec 1#53(10. 1.1.1)
;; SERVER: 10.1.1.
;; WHEN: to. mai 12 13:59:19 CEST 2016
;; MSG SIZE rcvd: 178