Hi, I can’t access sdformat.org for at least 4 hours now (it worked last week). Pings to 54.84.92.95 do not respond. I tried from 4 different autonomous systems (all in Czech republic; one cell provider, two home broadband providers, one university provider). When I tried to ping from a cloud instance abroad, it worked, so I assume the problem is somehow geographical…
Example tracepath:
$ tracepath sdformat.org
1?: [LOCALHOST] pmtu 1500
1: _gateway 0.446ms
1: _gateway 0.445ms
2: _gateway 0.439ms pmtu 1492
2: 10.11.5.146 5.739ms
3: no reply
4: 10.80.255.1 6.274ms
5: 10.51.254.1 6.044ms asymm 6
6: r-sitel.pe3ny.net 8.002ms
7: 82.113.32.226 9.843ms
8: prag-b4-link.ip.twelve99.net 6.556ms
9: ffm-bb2-link.ip.twelve99.net 12.868ms asymm 11
10: prs-bb2-link.ip.twelve99.net 21.720ms asymm 12
11: rest-bb1-link.ip.twelve99.net 99.202ms asymm 13
12: ash-b2-link.ip.twelve99.net 99.657ms
13: vadata-svc077202-lag003838.ip.twelve99-cust.net 99.136ms asymm 14
14: no reply
15: no reply
16: 52.93.28.170 103.837ms asymm 17
17: no reply
18: no reply
19: no reply
20: no reply
21: no reply
22: no reply
23: no reply
24: no reply
25: no reply
26: no reply
27: no reply
28: no reply
29: no reply
30: no reply
Too many hops: pmtu 1492
Resume: pmtu 1492
DNS resolution works:
$ dig sdformat.org
; <<>> DiG 9.11.3-1ubuntu1.18-Ubuntu <<>> sdformat.org
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 37864
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
;; QUESTION SECTION:
;sdformat.org. IN A
;; ANSWER SECTION:
sdformat.org. 60 IN A 54.81.126.77
sdformat.org. 60 IN A 54.84.92.95
;; Query time: 11 msec
;; SERVER: 192.168.18.1#53(192.168.18.1)
;; WHEN: Mon Apr 03 23:58:45 CEST 2023
;; MSG SIZE rcvd: 73
Accessing gazebosim.org works.