---

n.razhev@n-razhev ~ % dscacheutil -q host -a name jss.corp.mail.ru
name: jss.corp.mail.ru
ip_address: 89.221.232.213

n.razhev@n-razhev ~ % dig @172.21.0.1 jss.corp.mail.ru A +time=2 +tries=1 +noall +comments +answer

; <<>> DiG 9.10.6 <<>> @172.21.0.1 jss.corp.mail.ru A +time=2 +tries=1 +noall +comments +answer
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 55612
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
;; ANSWER SECTION:
jss.corp.mail.ru.	1644	IN	A	89.221.232.213

n.razhev@n-razhev ~ % curl -4 --connect-timeout 5 --max-time 20 -sS -o /dev/null -w 'DNS=%{time_namelookup}s TCP=%{time_connect}s TLS=%{time_appconnect}s HTTP=%{http_code}\n' https://jss.corp.mail.ru:8443/
curl: (92) HTTP/2 stream 1 was not closed cleanly: ENHANCE_YOUR_CALM (err 11)
DNS=0.002901s TCP=0.348407s TLS=0.782996s HTTP=000
n.razhev@n-razhev ~ % dscacheutil -q host -a name jss.corp.mail.ru                                
name: jss.corp.mail.ru
ip_address: 10.12.165.142

n.razhev@n-razhev ~ % dig @172.21.0.1 jss.corp.mail.ru A +time=2 +tries=1 +noall +comments +answer

; <<>> DiG 9.10.6 <<>> @172.21.0.1 jss.corp.mail.ru A +time=2 +tries=1 +noall +comments +answer
; (1 server found)
;; global options: +cmd
;; connection timed out; no servers could be reached
n.razhev@n-razhev ~ % curl -4 --connect-timeout 5 --max-time 20 -sS -o /dev/null -w 'DNS=%{time_namelookup}s TCP=%{time_connect}s TLS=%{time_appconnect}s HTTP=%{http_code}\n' https://jss.corp.mail.ru:8443/
curl: (28) Failed to connect to jss.corp.mail.ru port 8443 after 5006 ms: Timeout was reached
DNS=0.002855s TCP=0.000000s TLS=0.000000s HTTP=000