openssh setting on windows : Connection reset

Question

I set up a (Ubuntu) virtual machine using Hyper-V on my Windows machine(Windows 10 Enterprise Edition OS) , but it seems my school network security rule does not allow me to share the internet to the VM, so I want to set up a ssh tunnel (to allow internet access on the VM for easy package installation using apt install).

I installed OpenSSH-Win64 on the windows machine. But when I try to connect from the ubuntu VM, it gives me error:

miranda@ubuntu-vm:~$ ssh -v 'cecs-030929\admin-u5214628'@150.203.213.249
OpenSSH_7.2p2 Ubuntu-4ubuntu2.2, OpenSSL 1.0.2g  1 Mar 2016
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: Connecting to 150.203.213.249 [150.203.213.249] port 22.
debug1: Connection established.
debug1: identity file /home/miranda/.ssh/id_rsa type 1
debug1: key_load_public: No such file or directory
debug1: identity file /home/miranda/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/miranda/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/miranda/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/miranda/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/miranda/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/miranda/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/miranda/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_7.2p2 Ubuntu-4ubuntu2.2
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.6
debug1: match: OpenSSH_7.6 pat OpenSSH* compat 0x04000000
debug1: Authenticating to 150.203.213.249:22 as 'cecs-030929\\admin-u5214628'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: curve25519-sha256@libssh.org
debug1: kex: host key algorithm: ecdsa-sha2-nistp256
debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
Connection reset by 150.203.213.249 port 22

I don't know where to look. Some check from the Ubuntu VM:

miranda@ubuntu-vm:~$ tcpdchk
miranda@ubuntu-vm:~$ tcpdchk -v
Using network configuration file: (null)
miranda@ubuntu-vm:~$ ifconfig
eth0      Link encap:Ethernet  HWaddr 00:15:5d:d5:f9:07
          inet addr:150.203.213.248  Bcast:150.203.213.255  Mask:255.255.255.0
          inet6 addr: fe80::215:5dff:fed5:f907/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:104320 errors:0 dropped:0 overruns:0 frame:0
          TX packets:369 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:16960579 (16.9 MB)  TX bytes:65010 (65.0 KB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:61438 errors:0 dropped:0 overruns:0 frame:0
          TX packets:61438 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1
          RX bytes:5382563 (5.3 MB)  TX bytes:5382563 (5.3 MB)

I have manually added a file hosts.allow in C:\Windows\System32\drivers\etc with the following content:

sshd: 150.203.213.248

It did not make any difference.

I'm not sure how to and what exactly to check, could you please give me more instructions? — Mzq, Nov 05 '17 at 23:45

score 1 · Accepted Answer · answered Mar 04 '19 at 13:08

1

That's a known issue, it's described here:

https://github.com/PowerShell/Win32-OpenSSH/issues/1027

Make sure you're a SYSTEM when you run sshd and collect logs.

answered Mar 04 '19 at 13:08

Undespairable

126
3

score 0 · Answer 2 · answered Oct 16 '20 at 09:06

Extract contents of the latest build to C:\Program Files\OpenSSH (Make sure binary location has the Write permissions to just to SYSTEM, Administrator groups. Authenticated users should and only have Read and Execute.)

In my case, after assigning "Read and Execute" permission for "Authenticated users", it works.

please refer to the installtion doc https://github.com/PowerShell/Win32-OpenSSH/wiki/Install-Win32-OpenSSH#install-win32-openssh-test-release

openssh setting on windows : Connection reset

2 Answers2