Trying PM to server admin. From another diagnostic view method, here’s Linux showing a successful connection and disconnection to port 80 from telnet, and one to port 443 that isn’t getting a response.
# tcpdump -i any -n host 134.122.74.64
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on any, link-type LINUX_SLL (Linux cooked), capture size 262144 bytes
07:32:06.432880 IP 10.0.2.15.43430 > 134.122.74.64.80: Flags [S], seq 3804073452, win 64240, options [mss 1460,sackOK,TS val 3994389539 ecr 0,nop,wscale 7], length 0
07:32:06.537325 IP 134.122.74.64.80 > 10.0.2.15.43430: Flags [S.], seq 564685825, ack 3804073453, win 65535, options [mss 1460], length 0
07:32:06.537374 IP 10.0.2.15.43430 > 134.122.74.64.80: Flags [.], ack 1, win 64240, length 0
07:32:12.193371 IP 134.122.74.64.80 > 10.0.2.15.35396: Flags [R.], seq 549453826, ack 4174870670, win 65535, length 0
07:32:19.993352 IP 10.0.2.15.43430 > 134.122.74.64.80: Flags [F.], seq 1, ack 1, win 64240, length 0
07:32:19.993864 IP 134.122.74.64.80 > 10.0.2.15.43430: Flags [.], ack 2, win 65535, length 0
07:33:06.359771 IP 10.0.2.15.35608 > 134.122.74.64.443: Flags [S], seq 3092628054, win 64240, options [mss 1460,sackOK,TS val 3994449466 ecr 0,nop,wscale 7], length 0
07:33:07.360510 IP 10.0.2.15.35608 > 134.122.74.64.443: Flags [S], seq 3092628054, win 64240, options [mss 1460,sackOK,TS val 3994450466 ecr 0,nop,wscale 7], length 0
07:33:09.376523 IP 10.0.2.15.35608 > 134.122.74.64.443: Flags [S], seq 3092628054, win 64240, options [mss 1460,sackOK,TS val 3994452482 ecr 0,nop,wscale 7], length 0
07:33:13.568719 IP 10.0.2.15.35608 > 134.122.74.64.443: Flags [S], seq 3092628054, win 64240, options [mss 1460,sackOK,TS val 3994456675 ecr 0,nop,wscale 7], length 0
07:33:21.760818 IP 10.0.2.15.35608 > 134.122.74.64.443: Flags [S], seq 3092628054, win 64240, options [mss 1460,sackOK,TS val 3994464867 ecr 0,nop,wscale 7], length 0
07:33:37.889129 IP 10.0.2.15.35608 > 134.122.74.64.443: Flags [S], seq 3092628054, win 64240, options [mss 1460,sackOK,TS val 3994480995 ecr 0,nop,wscale 7], length 0
07:34:11.936443 IP 10.0.2.15.35608 > 134.122.74.64.443: Flags [S], seq 3092628054, win 64240, options [mss 1460,sackOK,TS val 3994515042 ecr 0,nop,wscale 7], length 0
^C
13 packets captured
13 packets received by filter
0 packets dropped by kernel
#