Bonjour,
I am wondering why some dns servers are available and some other are not
if I set them in resolv.conf (or other dns config files)?
For instance this can be seen using dig:
dig @8.8.8.8 sci-hub.se returns:
; <<>> DiG 9.18.28 <<>> @8.8.8.8 sci-hub.se
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 40528
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;sci-hub.se. IN A
;; ANSWER SECTION:
sci-hub.se. 33 IN A 186.2.163.219
;; Query time: 31 msec
;; SERVER: 8.8.8.8#53(8.8.8.8) (UDP)
;; WHEN: Wed Apr 23 19:11:41 CEST 2025
;; MSG SIZE rcvd: 55
And dig @80.67.169.12 sci-hub.se returns:
;; communications error to 80.67.169.12#53: host unreachable
;; communications error to 80.67.169.12#53: timed out
;; communications error to 80.67.169.12#53: timed out
; <<>> DiG 9.18.28 <<>> @80.67.169.12 sci-hub.se
; (1 server found)
;; global options: +cmd
;; no servers could be reached
while this server is working (and is a dns server):
ping 80.67.169.12
PING 80.67.169.12 (80.67.169.12) 56(84) octets de données.
64 octets de 80.67.169.12 : icmp_seq=1 ttl=52 temps=25.9 ms
64 octets de 80.67.169.12 : icmp_seq=2 ttl=52 temps=25.3 ms
64 octets de 80.67.169.12 : icmp_seq=3 ttl=52 temps=26.1 ms
64 octets de 80.67.169.12 : icmp_seq=4 ttl=52 temps=26.0 ms
--
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