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无法通过 SSH 连接到远程计算机

tag-icon • tag-icon networking server ssh proxy
无法通过 SSH 连接到远程计算机

我的 Ubuntu 电脑上有两个代理（两个 IP 地址）连接，我试图ssh使用“corkscrew”连接到我的大学超级计算机，但无法连接，失败了，因为

Couldn't establish connection to proxy: Connection timed out
kex_exchange_identification: Connection closed by remote host

你能帮我一下吗？

我能够按照相同的过程从另一台只有一个ip

输出ssh -v：

sachin@localhost:~$ ssh -v [email protected]
OpenSSH_8.2p1 Ubuntu-4ubuntu0.5, OpenSSL 1.1.1f  31 Mar 2020
debug1: Reading configuration data /home/sachin/.ssh/config
debug1: /home/sachin/.ssh/config line 1: Applying options for *.compunet.barc.in
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: include /etc/ssh/ssh_config.d/*.conf matched no files
debug1: /etc/ssh/ssh_config line 21: Applying options for *
debug1: Executing proxy command: exec corkscrew compunetgw.barc.gov.in 8080 atulya.compunet.barc.in 22 ~/.ssh/proxyauth
debug1: identity file /home/sachin/.ssh/id_rsa type 0
debug1: identity file /home/sachin/.ssh/id_rsa-cert type -1
debug1: identity file /home/sachin/.ssh/id_dsa type -1
debug1: identity file /home/sachin/.ssh/id_dsa-cert type -1
debug1: identity file /home/sachin/.ssh/id_ecdsa type -1
debug1: identity file /home/sachin/.ssh/id_ecdsa-cert type -1
debug1: identity file /home/sachin/.ssh/id_ecdsa_sk type -1
debug1: identity file /home/sachin/.ssh/id_ecdsa_sk-cert type -1
debug1: identity file /home/sachin/.ssh/id_ed25519 type -1
debug1: identity file /home/sachin/.ssh/id_ed25519-cert type -1
debug1: identity file /home/sachin/.ssh/id_ed25519_sk type -1
debug1: identity file /home/sachin/.ssh/id_ed25519_sk-cert type -1
debug1: identity file /home/sachin/.ssh/id_xmss type -1
debug1: identity file /home/sachin/.ssh/id_xmss-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_8.2p1 Ubuntu-4ubuntu0.5
Couldn't establish connection to proxy: Connection timed out
kex_exchange_identification: Connection closed by remote host

输出ip a

sachin@localhost:~$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever    
2: enp1s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 00:e0:4c:68:12:d2 brd ff:ff:ff:ff:ff:ff
    inet 10.143.111.41/24 brd 10.143.111.255 scope global noprefixroute enp1s0
       valid_lft forever preferred_lft forever
    inet6 fe80::b3fe:fd97:d21c:6b88/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever      
3: enp4s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 70:85:c2:ba:10:14 brd ff:ff:ff:ff:ff:ff
    inet 10.15.111.45/24 brd 10.15.111.255 scope global noprefixroute enp4s0
       valid_lft forever preferred_lft forever
    inet6 fe80::b524:bbb9:23f7:32e9/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever

输出ip route

sachin@localhost:~$ ip route
default via 10.143.111.1 dev enp1s0 proto static metric 20100
default via 10.15.111.1 dev enp4s0 proto static metric 20101
10.15.91.230 via 10.15.111.1 dev enp4s0
10.15.111.0/24 dev enp4s0 proto kernel scope link src 10.15.111.45 metric 101'     
10.143.111.0/24 dev enp1s0 proto kernel scope link src 10.143.111.41 metric 100'      
90.3.15.135 via 10.15.111.1 dev enp4s0
169.254.0.0/16 dev enp1s0 scope link metric 1000

答案1

我认为ip route show仍然显示相同的输出。

运行以下命令并尝试再次连接：

$ip route add default via 10.143.111.1 dev enp1s0 proto static metric 20102
$ip route del default via 10.143.111.1 dev enp1s0 proto static metric 20100

[编辑]

若操作不允许，请以root权限执行：

$sudo ip route add default via 10.143.111.1 dev enp1s0 proto static metric 20102
$sudo ip route del default via 10.143.111.1 dev enp1s0 proto static metric 20100

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