Issues with aus3.mozilla.org and aus4.mozilla.org
I am a DNS administator at my employers and notice that on my employers network that aus3.mozilla.org and aus4.mozilla.org seem to be returning NXDOMAIN both with our on prem DNS and via the public dns providers when a browser attempts update it can fail.
Have other Australian users reported such behavior and are these hosts still valid
DIG
grudd@crayon:~$ dig @8.8.8.8 aus3.mozilla.org
- <<>> DiG 9.18.30-0ubuntu0.20.04.2-Ubuntu <<>> @8.8.8.8 aus3.mozilla.org
- (1 server found)
- global options: +cmd
- Got answer:
- ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 40382
- flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1
- OPT PSEUDOSECTION:
- EDNS: version: 0, flags:; udp: 512
- QUESTION SECTION:
- aus3.mozilla.org. IN A
- AUTHORITY SECTION:
mozilla.org. 2 IN SOA infoblox1.private.mdc1.mozilla.com. hostmaster.mozilla.com. 2024020614 180 180 1209600 60
- Query time: 0 msec
- SERVER: 8.8.8.8#53(8.8.8.8) (UDP)
- WHEN: Mon Jun 02 10:04:52 AEST 2025
- MSG SIZE rcvd: 126
grudd@crayon:~$ dig stun.services.mozilla.com
- <<>> DiG 9.18.30-0ubuntu0.20.04.2-Ubuntu <<>> stun.services.mozilla.com
- global options: +cmd
- Got answer:
- ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 56679
- flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1
- OPT PSEUDOSECTION:
- EDNS: version: 0, flags:; udp: 1280
- QUESTION SECTION:
- AUTHORITY SECTION:
services.mozilla.com. 836 IN SOA ns-679.awsdns-20.net. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
- Query time: 0 msec
- SERVER: 10.67.10.62#53(10.67.10.62) (UDP)
- WHEN: Mon Jun 02 10:13:11 AEST 2025
- MSG SIZE rcvd: 138
grudd@crayon:~$ dig @8.8.8.8 stun.services.mozilla.com
- <<>> DiG 9.18.30-0ubuntu0.20.04.2-Ubuntu <<>> @8.8.8.8 stun.services.mozilla.com
- (1 server found)
- global options: +cmd
- Got answer:
- ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 62337
- flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1
- OPT PSEUDOSECTION:
- EDNS: version: 0, flags:; udp: 512
- QUESTION SECTION:
- AUTHORITY SECTION:
services.mozilla.com. 127 IN SOA ns-679.awsdns-20.net. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
- Query time: 0 msec
- SERVER: 8.8.8.8#53(8.8.8.8) (UDP)
- WHEN: Mon Jun 02 10:13:19 AEST 2025
- MSG SIZE rcvd: 135
grudd@crayon:~$ dig @8.8.8.8 aus4.mozilla.org
- <<>> DiG 9.18.30-0ubuntu0.20.04.2-Ubuntu <<>> @8.8.8.8 aus4.mozilla.org
- (1 server found)
- global options: +cmd
- Got answer:
- ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 15261
- flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1
- OPT PSEUDOSECTION:
- EDNS: version: 0, flags:; udp: 512
- QUESTION SECTION:
- aus4.mozilla.org. IN A
- AUTHORITY SECTION:
mozilla.org. 40 IN SOA infoblox1.private.mdc1.mozilla.com. hostmaster.mozilla.com. 2024020614 180 180 1209600 60
- Query time: 4 msec
- SERVER: 8.8.8.8#53(8.8.8.8) (UDP)
- WHEN: Mon Jun 02 10:24:30 AEST 2025
- MSG SIZE rcvd: 126
grudd@crayon:~$ dig @8.8.8.8 aus4.mozilla.org
- <<>> DiG 9.18.30-0ubuntu0.20.04.2-Ubuntu <<>> @8.8.8.8 aus4.mozilla.org
- (1 server found)
- global options: +cmd
- Got answer:
- ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 26928
- flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1
- OPT PSEUDOSECTION:
- EDNS: version: 0, flags:; udp: 512
- QUESTION SECTION:
- aus4.mozilla.org. IN A
- AUTHORITY SECTION:
mozilla.org. 35 IN SOA infoblox1.private.mdc1.mozilla.com. hostmaster.mozilla.com. 2024020614 180 180 1209600 60
- Query time: 0 msec
- SERVER: 8.8.8.8#53(8.8.8.8) (UDP)
- WHEN: Mon Jun 02 10:24:32 AEST 2025
- MSG SIZE rcvd: 126
grudd@crayon:~$ dig @8.8.8.8 aus5.mozilla.org
- <<>> DiG 9.18.30-0ubuntu0.20.04.2-Ubuntu <<>> @8.8.8.8 aus5.mozilla.org
- (1 server found)
- global options: +cmd
- Got answer:
- ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 37023
- flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 1
- OPT PSEUDOSECTION:
- EDNS: version: 0, flags:; udp: 512
- QUESTION SECTION:
- aus5.mozilla.org. IN A
- ANSWER SECTION:
aus5.mozilla.org. 48 IN CNAME balrog-aus5.r53-2.services.mozilla.com. balrog-aus5.r53-2.services.mozilla.com. 58 IN CNAME prod.balrog.prod.cloudops.mozgcp.net. prod.balrog.prod.cloudops.mozgcp.net. 984 IN A 35.244.181.201
- Query time: 4 msec
- SERVER: 8.8.8.8#53(8.8.8.8) (UDP)
- WHEN: Mon Jun 02 10:24:43 AEST 2025
- MSG SIZE rcvd: 163
grudd@crayon:~$ dig @8.8.8.8 aus5.mozilla.org SOA
- <<>> DiG 9.18.30-0ubuntu0.20.04.2-Ubuntu <<>> @8.8.8.8 aus5.mozilla.org SOA
- (1 server found)
- global options: +cmd
- Got answer:
- ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 65395
- flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 1, ADDITIONAL: 1
- OPT PSEUDOSECTION:
- EDNS: version: 0, flags:; udp: 512
- QUESTION SECTION:
- aus5.mozilla.org. IN SOA
- ANSWER SECTION:
aus5.mozilla.org. 42 IN CNAME balrog-aus5.r53-2.services.mozilla.com. balrog-aus5.r53-2.services.mozilla.com. 52 IN CNAME prod.balrog.prod.cloudops.mozgcp.net.
- AUTHORITY SECTION:
balrog.prod.cloudops.mozgcp.net. 300 IN SOA ns-cloud-d1.googledomains.com. cloud-dns-hostmaster.google.com. 1 21600 3600 259200 300
- Query time: 108 msec
- SERVER: 8.8.8.8#53(8.8.8.8) (UDP)
- WHEN: Mon Jun 02 10:24:49 AEST 2025
- MSG SIZE rcvd: 237
grudd@crayon:~$
All Replies (1)
Both aus3 and aus4 have been decommissioned. Our current update server is aus5.
That last version of Firefox that used aus3 was version 35 and the last version that used aus4 was 41.
So there really shouldn't be any reason to connect to those servers.
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