reverse DNS broken at cymru
i just opened a ticket with cymru named "URGENT: reverse DNS for 38.229.82.0/24 broken", it was assigned the ticket number CST-316.
i noticed this while trying to launch gettor-rdsys (#40789 (closed)), mails would fail to route to eugeni with:
host eugeni.torproject.org[49.12.57.136] said: 450 4.7.25 Client host rejected: cannot find your hostname, [38.229.82.36] (in reply to RCPT TO command)
and indeed reverse DNS is broken on that IP... hell, here's a copy of the ticket i sent to cymru:
anarcat@curie:~$ host 38.229.82.36 Host 36.82.229.38.in-addr.arpa. not found: 3(NXDOMAIN) anarcat@curie:~[1]$
It looks like the entire zone delegation was removed:
anarcat@curie:~$ dig -x 38.229.82.36 ; <<>> DiG 9.16.33-Debian <<>> -x 38.229.82.36 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 56474 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 1232 ;; QUESTION SECTION: ;36.82.229.38.in-addr.arpa. IN PTR ;; AUTHORITY SECTION: 82.229.38.in-addr.arpa. 3355 IN SOA ns1.cymru.com. empty.empty. 39 3600 600 1209600 3600 ;; Query time: 52 msec ;; SERVER: 1.1.1.1#53(1.1.1.1) ;; WHEN: Wed Sep 28 10:24:27 EDT 2022 ;; MSG SIZE rcvd: 114
38.229.82.0/24 used to be delegated to tor's nameservers, which are:
torproject.org. 86400 IN NS ns1.torproject.org. torproject.org. 86400 IN NS ns3.torproject.org. torproject.org. 86400 IN NS ns4.torproject.org. torproject.org. 86400 IN NS ns5.torproject.org. torproject.org. 86400 IN NS nsp.dnsnode.net.
this is causing an outage on our end as servers in that cluster are having trouble delivering mail.