在wireshark 日志中，我发现我的 Lubuntu 18.04 调用了Amazon servers。看到这个日志：
17 192.168.1.1 192.168.1.13 DNS 118 Standard query response 0x0e33 A motd.ubuntu.com A 54.194.229.79 A 52.18.210.215 OPT
18 192.168.1.1 192.168.1.13 DNS 142 Standard query response 0xebef AAAA motd.ubuntu.com AAAA 2a05:d018:91c:3200:4a81:cf9a:267b:97df AAAA 2a05:d018:91c:3200:5869:6d03:bf3a:f619 OPT
19 192.168.1.13 54.194.229.79 TCP 74 50656 > 443 [SYN] Seq=0 Win=29200 Len=0 MSS=1460 SACK_PERM=1 TSval=4010357077 TSecr=0 WS=128
20 54.194.229.79 192.168.1.13 TCP 74 443 > 50656 [SYN, ACK] Seq=0 Ack=1 Win=26847 Len=0 MSS=1380 SACK_PERM=1 TSval=2116889653 TSecr=4010357077 WS=128
21 192.168.1.13 54.194.229.79 TCP …