在我开始使用热点 Wi-Fi 而不是普通 Wi-Fi 之前，我从未遇到过这个问题。
connection closed by xx.xxx.xxx.xx当我尝试通过 SSH 进入我的 Amazon 实例时，总是会出现以下情况：
jeff@jeff-Inspiron-5749:~$ ssh -v -i /path/to/key.pem [email protected]
OpenSSH_6.6.1, OpenSSL 1.0.1f 6 Jan 2014
debug1: Reading configuration data /home/jeff/.ssh/config
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: Connecting to 9.99.999.99 [9.99.999.99] port 22.
debug1: Connection established.
debug1: identity file /path/to/key.pem type -1
debug1: identity file /path/to/key.pem-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.8
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.13
debug1: match: OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.13 pat OpenSSH_6.6.1* compat 0x04000000
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr [email protected] none
debug1: kex: client->server aes128-ctr [email protected] none
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
Connection closed by 9.99.999.99
编辑：
我还尝试更改 EC2 的入站安全规则以接受所有 IP 地址：0.0.0.0/0，这有时会起作用，但只是偶尔。我怀疑这可能是我的热点 Wi-Fi 的连接/速度问题？但我可以很好地在 YouTube 上播放视频...
我目前已通过在亚马逊上选择“使用我的 IP”将我的热点 IP 地址列入白名单。
编辑2：
我切换回正常 WiFi，这样我就可以登录到我的 EC2 并查看 /var/log/auth.log 文件，这是我发现的内容：
AUG 20 08:05:01: session opened for user root by (uid=0)
AUG 20 08:05:01: session closed for user root
在许多行中...总是以相同的时间。打开并立即关闭。
跟踪路由信息：
使用正常 wifi 进行跟踪路由：
jeff@jeff-Inspiron-5749:~$ traceroute 3.15.182.213
traceroute to 3.15.182.213 (3.15.182.213), 30 hops max, 60 byte packets
1 192.168.1.1 (192.168.1.1) 0.957 ms 1.382 ms 1.380 ms
2 * * *
3 173-219-251-70.suddenlink.net (173.219.251.70) 28.725 ms 28.740 ms 29.351 ms
4 173-219-243-78.suddenlink.net (173.219.243.78) 32.849 ms 33.736 ms 40.397 ms
5 173-219-251-42.suddenlink.net (173.219.251.42) 40.376 ms 40.385 ms 43.927 ms
6 sjo-b21-link.telia.net (213.248.71.92) 43.931 ms 27.817 ms 27.746 ms
7 kanc-b1-link.telia.net (213.155.132.181) 56.957 ms 62.528 ms 62.489 ms
8 chi-b22-link.telia.net (62.115.121.231) 74.532 ms 79.607 ms 79.564 ms
9 a100-ic-320469-chi-b22.c.telia.net (213.248.76.189) 85.049 ms 85.025 ms 90.579 ms
10 52.95.63.36 (52.95.63.36) 93.491 ms 52.95.63.100 (52.95.63.100) 90.982 ms 52.95.63.84 (52.95.63.84) 69.568 ms
11 52.95.63.129 (52.95.63.129) 69.504 ms 52.95.63.81 (52.95.63.81) 67.446 ms 52.95.63.93 (52.95.63.93) 66.798 ms
12 * * *
13 54.239.43.213 (54.239.43.213) 101.916 ms 54.239.43.221 (54.239.43.221) 101.347 ms 54.239.43.213 (54.239.43.213) 93.177 ms
14 * * *
15 52.95.3.38 (52.95.3.38) 92.952 ms 52.95.2.150 (52.95.2.150) 96.277 ms 52.95.2.232 (52.95.2.232) 84.388 ms
16 52.95.2.219 (52.95.2.219) 87.294 ms 52.95.2.137 (52.95.2.137) 88.427 ms 52.95.2.163 (52.95.2.163) 88.596 ms
17 52.95.2.164 (52.95.2.164) 87.236 ms 52.95.2.106 (52.95.2.106) 95.621 ms 52.95.2.252 (52.95.2.252) 99.941 ms
18 52.95.2.171 (52.95.2.171) 85.164 ms 52.95.2.199 (52.95.2.199) 85.299 ms 52.95.2.87 (52.95.2.87) 95.134 ms
19 52.95.1.6 (52.95.1.6) 91.705 ms 91.658 ms 52.95.3.132 (52.95.3.132) 88.059 ms
20 * * *
21 * * *
22 * * *
23 * * *
24 * * *
25 * * *
26 * * *
27 * * *
28 * * *
29 * * *
30 * * *
jeff@jeff-Inspiron-5749:~$
使用热点 wifi 进行跟踪路由：
jeff@jeff-Inspiron-5749:~$ traceroute 3.15.182.213
traceroute to 3.15.182.213 (3.15.182.213), 30 hops max, 60 byte packets
1 192.168.43.1 (192.168.43.1) 104.447 ms 104.446 ms 104.443 ms
2 249.sub-66-174-31.myvzw.com (66.174.31.249) 168.149 ms 177.345 ms 177.575 ms
3 * * *
4 * * *
5 * * *
6 171.sub-69-83-164.myvzw.com (69.83.164.171) 177.511 ms 33.417 ms 33.247 ms
7 3.sub-69-83-164.myvzw.com (69.83.164.3) 33.845 ms 126.625 ms 126.604 ms
8 232.sub-69-83-160.myvzw.com (69.83.160.232) 126.600 ms 126.577 ms 126.553 ms
9 122.sub-69-82-83.myvzw.com (69.82.83.122) 126.556 ms 126.551 ms 44.159 ms
10 137.sub-66-174-29.myvzw.com (66.174.29.137) 50.315 ms 50.333 ms 50.723 ms
11 209.116.153.13 (209.116.153.13) 51.129 ms 51.102 ms 51.109 ms
12 207.88.14.197.ptr.us.xo.net (207.88.14.197) 74.258 ms 77.847 ms 77.731 ms
13 52.95.217.244 (52.95.217.244) 77.306 ms 52.95.217.130 (52.95.217.130) 77.072 ms 76.966 ms
14 176.32.125.212 (176.32.125.212) 77.031 ms 176.32.125.164 (176.32.125.164) 74.228 ms 176.32.125.152 (176.32.125.152) 74.386 ms
15 176.32.125.157 (176.32.125.157) 79.744 ms 176.32.125.181 (176.32.125.181) 79.703 ms 176.32.125.203 (176.32.125.203) 79.466 ms
16 * * *
17 52.93.129.119 (52.93.129.119) 106.968 ms 52.93.129.109 (52.93.129.109) 109.956 ms 52.93.129.119 (52.93.129.119) 109.554 ms
18 * * *
19 52.95.2.148 (52.95.2.148) 112.365 ms 52.95.2.30 (52.95.2.30) 104.080 ms 52.95.2.148 (52.95.2.148) 108.191 ms
20 52.95.2.163 (52.95.2.163) 113.684 ms 52.95.2.195 (52.95.2.195) 104.267 ms 52.95.2.111 (52.95.2.111) 102.228 ms
21 52.95.2.168 (52.95.2.168) 104.889 ms 52.95.2.190 (52.95.2.190) 110.505 ms 52.95.2.164 (52.95.2.164) 107.502 ms
22 52.95.3.27 (52.95.3.27) 119.008 ms 52.95.2.199 (52.95.2.199) 112.348 ms 52.95.2.255 (52.95.2.255) 106.043 ms
23 52.95.3.132 (52.95.3.132) 109.461 ms 110.252 ms 52.95.1.2 (52.95.1.2) 109.603 ms
24 * * *
25 * * *
26 * * *
27 * * *
28 * * *
29 * * *
30 * * *
jeff@jeff-Inspiron-5749:~$