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nabamb opened this issue Sep 17, 2018 · 2 comments
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SSH.net Cisco Router Initial connection failed #469

nabamb opened this issue Sep 17, 2018 · 2 comments
Milestone
2023.0.1

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@nabamb
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nabamb commented Sep 17, 2018

I am hobbyist programmer. I am getting error using Renci.SshNet. It gives me following error at statement sshclient.Connect();

System.Net.Sockets.SocketException:'The attempted operation is not supported for the type of object referenced'

My code is

private void Rstbutton_Click(object sender, RoutedEventArgs e)
{
s_ipaddr = IPAddr.Text;

s_username = UsernameBox.Text;
s_password = PassBox.Password.ToString();
SecureString myPass = PassBox.SecurePassword;

using (var sshclient = new SshClient(s_ipaddr, s_username, s_password)) 
{
    sshclient.Connect();
}

}

I am using Renci.SshNet.dll directly in the reference no installation from Nuget.
likeMyCoffee added a commit to likeMyCoffee/SSH.NET that referenced this issue Jun 29, 2021
@likeMyCoffee
Cisco connection issue fix
bd95e41 
Certain Cisco devices do not adhere to RFC4342 and do not reply if the client identifies first.
Since identifcation can be in random order it will give random connection issues because the SSH_MSG_KEXINIT will not be sent if the client is faster.

Since SSH.Net is not at fault and compatibility with Cisco (and possibly other) devices is something that can easily be supported I've written this modification.

Added LazyIdentification to the ConnectionInfo object to allow late identification in ProtocolVersionExchange.
Overloaded 'Start' function to keep the original functionality and tests intact.

Highly likely fixes issues sshnet#752, sshnet#778, sshnet#469 and might help with sshnet#798, sshnet#767, sshnet#807
likeMyCoffee added a commit to likeMyCoffee/SSH.NET that referenced this issue Jun 29, 2021
@likeMyCoffee
Cisco connection issue fix
60069be 
Certain Cisco devices do not adhere to RFC4342 and do not reply if the client identifies first.
Since identifcation can be in random order it will give random connection issues because the SSH_MSG_KEXINIT will not be sent if the client is faster.

Since SSH.Net is not at fault and compatibility with Cisco (and possibly other) devices is something that can easily be supported I've written this modification.

Added LazyIdentification to the ConnectionInfo object to allow late identification in ProtocolVersionExchange.
Overloaded 'Start' function to keep the original functionality and tests intact.

Highly likely fixes issues sshnet#752, sshnet#778, sshnet#469 and might help with sshnet#798, sshnet#767, sshnet#807
@likeMyCoffee likeMyCoffee mentioned this issue Jun 29, 2021
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@WojciechNagorski
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It's done in #1274

@WojciechNagorski WojciechNagorski added this to the 2023.0.1 milestone Dec 21, 2023
@WojciechNagorski
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The 2023.0.1 version has been released to Nuget: https://www.nuget.org/packages/SSH.NET/2023.0.1

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@nabamb @WojciechNagorski