201.180.100.84.in-addr.arpa mail.ru.dig +nocmd -x 94.100.180.201 +noall +answer | awk '{print $1 $NF}'201.180.100.94.in-addr.arpa mail.ru.
Frame 365: 60 bytes on wire (480 bits), 60 bytes captured (480 bits) on interface ens32, id 0
Ethernet II, Src: 6e:99:2a:f3:49:8f (6e:99:2a:f3:49:8f), Dst: VMware_99:4c:3c (00:0c:29:99:4c:3c)
Internet Protocol Version 4, Src: 104.31.78.80, Dst: 192.168.5.17
Transmission Control Protocol, Src Port: 443, Dst Port: 54062, Seq: 98873, Len: 0
Source Port: 443
Destination Port: 54062
[Stream index: 6]
[TCP Segment Len: 0]
Sequence number: 98873 (relative sequence number)
Sequence number (raw): 2505378697
[Next sequence number: 98873 (relative sequence number)]
Acknowledgment number: 0
Acknowledgment number (raw): 0
0101 .... = Header Length: 20 bytes (5)
Flags: 0x004 (RST)
000. .... .... = Reserved: Not set
...0 .... .... = Nonce: Not set
.... 0... .... = Congestion Window Reduced (CWR): Not set
.... .0.. .... = ECN-Echo: Not set
.... ..0. .... = Urgent: Not set
.... ...0 .... = Acknowledgment: Not set
.... .... 0... = Push: Not set
.... .... .1.. = Reset: Set
[Expert Info (Warning/Sequence): Connection reset (RST)]
[Connection reset (RST)]
[Severity level: Warning]
[Group: Sequence]
.... .... ..0. = Syn: Not set
.... .... ...0 = Fin: Not set
[TCP Flags: ·········R··]
Window size value: 0
[Calculated window size: 0]
[Window size scaling factor: 1024]
Checksum: 0xbdef [unverified]
[Checksum Status: Unverified]
Urgent pointer: 0
[Timestamps]
[Time since first frame in this TCP stream: 0.089217306 seconds]
[Time since previous frame in this TCP stream: 0.000608673 seconds][root@vega ~]# nmap -p80,443 sounds.sng7.com
Starting Nmap 6.40 ( nmap.org ) at 2020-01-31 14:48 MSK
Nmap scan report for sounds.sng7.com (104.31.79.80)
Host is up (0.0028s latency).
Other addresses for sounds.sng7.com (not scanned): 104.31.78.80
PORT STATE SERVICE
80/tcp open http
443/tcp open https
Nmap done: 1 IP address (1 host up) scanned in 0.24 seconds
TCP connection reset by peer