[ More Info ]

[/os/windows/network/ssh/putty] permanent link

L22011=192.168.0.11:22,L33018=192.168.0.18:33018

[ More Info ]

[/os/windows/network/ssh/putty] permanent link

An error occurred while trying to replace the existing file:
DeleteFile failed; code 5.
Access is denied.

Click Retry to try again, Ignore to skip this file (not recommended), or Abort to cancel installation.

[ More Info ]

[/os/windows/network/ssh/freeSSHd] permanent link

[ More Info ]

[/os/windows/network/ssh/putty] permanent link

[ More Info ]

[/os/windows/network/ssh/putty] permanent link

Alternatively, you can set up a SOCKS proxy using PuTTY as noted at Using PuTTY to set up a SOCKS Proxy Connection. Instructions for configuring some browsers ito use a SOCKS proxy are provided from the links below:

• Chrome
• Internet Explorer 6
• Internet Explorer 10

[/os/windows/network/ssh/putty] permanent link

Once you've added instances of port forwarding you can't edit those instances through the PuTTY configuration window though you can remove them and add new ones. The information for port forwarding is stored in the registry under the following key where Session_Name is the name for a stored session:

HKEY_CURRENT_USER\Software\SimonTatham\PuTTY\Sessions\Session_Name

Updates are stored when you save a session.

E.g., if I saved a session with the name Omega using the tunneling configuration shown above, the registry entry at HKEY_CURRENT_USER\Software\SimonTatham\PuTTY\Sessions\Omega for a dynamic SOCKS proxy at port 1080 and forwarding for RDP using local port 30,089 forwarded to port 3389 on a system with IP address 192.168.0.5 would be as follows:

I could change the details for the port forwardings by editing the registry entry. I would see the changed values when I loaded the session. I could check the information from a command prompt with the following command:

C:\>reg query "HKEY_CURRENT_USER\Software\SimonTatham\PuTTY\Sessions\Omega" /v PortForwardings

HKEY_CURRENT_USER\Software\SimonTatham\PuTTY\Sessions\Omega
    PortForwardings    REG_SZ    D1080=,L30089=192.168.0.5:3389

[/os/windows/network/ssh/putty] permanent link

C:\Program Files\SSH\OpenSSH\bin>ssh -c 3des jdoe@192.168.0.15
no matching cipher found: client 3des-cbc server aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,chacha20-poly1305@openssh.com
C:\Program Files\SSH\OpenSSH\bin>ssh -c blowfish jdoe@192.168.0.15
no matching cipher found: client blowfish-cbc server aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,chacha20-poly1305@openssh.com

When I tried connecting from the SBS 2003 system to another system, to which I could successfully connect with the OpenSSH SSH client, when I specified the -v option for debugging output with ssh -v jdoe@example.com, I saw the following:

debug1: Remote protocol version 2.0, remote software version OpenSSH_6.4
debug1: match: OpenSSH_6.4 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_3.8.1p1
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-cbc hmac-md5 none
debug1: kex: client->server aes128-cbc hmac-md5 none

I upgraded PuTTY on the client system from version 0.58 to 0.63. I then no longer received the message about no matching cipher being found, but, instead saw another "PuTTY Fatal Error" window open, this time with the message "Network error: Software caused connection abort". I saw the same error message when I used PuTTY's plink utility from the command line.

C:\Program Files\Network\SSH\PuTTY>plink -ssh jdoe@192.168.0.15
Using username "jdoe".
jdoe@192.168.0.15's password:
FATAL ERROR: Network error: Software caused connection abort

I installed Bitvise SSH Client (Tunnelier) 6.08 and tried connecting with that client. Like with PuTTY, after I authenticated with the SSH server, I was immediately disconnected. I saw the following from Tunnelier:

First key exchange completed using ecdh-sha2/nistp521. Session encryption:
aes256-ctr, MAC: hmac-sha2-256, compression: none. Attempting password authentication.
Authentication completed.
The SSH2 session has terminated with error. Reason: FlowSocketReader: Error
receiving bytes. Windows error 10054: An existing connection was forcibly closed
by the remote host.

When I was able later to connect to the system running Copssh via RDP for troubleshooting after the user had left for the day, I checked its status log, which you can do on a Windows 7 system by the following steps:

1. Click on Start.
2. Select All Programs.
3. Select Copssh.
4. Select Copssh Control Panel.
5. Under the Status tab, you will see an icon that looks like a piece of paper with one edge folded down. You may also see something like "6 events last 15 minutes" next to it. Double-click on that icon.

   

When I checked the log, I saw many "fatal: mm_request_receive: read: Connection reset by peer" messages. There was a "Received SIGHUP; restarting" entry hours later.

2014.12.12 23:26:23 - Received SIGHUP; restarting.
2014.12.12 18:30:02 - fatal: mm_request_receive: read: Connection reset by peer

Seeing that, I tried establishing a connection with PuTTY again and was then able to log in by SSH successfully.

But then when I tried logging in remotely by SSH two days later the problem was back. I restarted the service within the Copssh Control Panel by clicking on the green button next to "Service is running" to stop the service. When the button turned red, I clicked on it again to restart the service, but that didn't resolve the problem; I still got the "Network error: Software caused connection abort" message when I tried connecting via PuTTY 0.63 and I saw the "fatal: mm_request_receive: read: Connection reset by peer" message in the Copssh log for evey connection attempt. Though I didn't expect it to resolve the problem, I tried the "net stop" and "net start" commands from a command prompt.

C:\Users\Administrator>net stop "OpenSSH SSHD"
The Openssh SSHD service is stopping.
The Openssh SSHD service was stopped successfully.


C:\Users\Administrator>net start "OpenSSH SSHD"
The Openssh SSHD service is starting.
The Openssh SSHD service was started successfully.

But that did work. I was then able to successfully log into the system via SSH.

[/os/windows/network/ssh/copssh] permanent link

I opened the Copssh control panel on the system and clicked on the Users tab. I had been trying to login with a domain account, but found that the activated users list showed only two local accounts on the system, but no domain accounts. When I clicked on the Add button to add a new user, I found that for the "Domain" setting, the only option I could choose was the local system, since its name appeared, but there was no other value to select in the drop-down list. When I tried using one of the listed accounts for the user name and password, I was able to successfully log in by SSH.

[/os/windows/network/ssh/copssh] permanent link

[/os/windows/network/ssh/putty] permanent link