How to login into Telnet without user name

Question

Hello

I have a device , which does not have a user name. I am mentioning the steps below; which I follow , using Putty.

1. Specify ip address and choose Telnet as an option.
2. The terminal screen appears, with the normal prompt.
3. Enter the first level password , to gain access
4. Enter the command "enable" without quotes
5. Enter the second level password, to gain access to the elevated prompt
6. The screen can be found at http://ctrlv.in/463900

I see all the examples in Rebex requires a login name, but in the above case no user name is required.

Please let me know how can I achieve the above situation using Rebex.

Thanks Sujay

Answer 1

Hello,

our samples contains login name requests because most of servers need it and send a request to enter the login name. Since your server does not need it, you can skip that step and make the Password: as your first step. Here is a code snippet that shows how to handle the screen you posted above.

Telnet telnet = new Telnet("server");
Scripting scripting = telnet.StartScripting();

// password prompt is not a regular prompt
scripting.ReadUntil("Password:");
// send first level password
scripting.SendCommand("first level password");

// here I believe that detect prompt can be used,
// or if you know that you will immediately send "enable" command
// you can read the prompt as a required text and not bother
// to set it as a prompt
scripting.ReadUntil("first level prompt"); // which ends with ">"

// if you connect to various devices with same behaviour but different
// prompt, but you want to skip to setsetting the first level prompt as
// discussed above, you can change ReadUntil argument to some regular
// expression

// uncomment this line if a regular expression is better way
// to handle various devices with different (but similar) prompts
// and comment out the 'scripting.ReadUntil("first level prompt");' line
// make sure that the regular expression describe your prompts correctly
//scripting.ReadUntil(ScriptEvent.FromRegex("[a-zA-Z0-9]+>");

// when you have first level prompt, send "enable" command
scripting.SendCommand("enable");

// password prompt is not a regular prompt, same as at the beginning
scripting.ReadUntil("Password:");
// send second level password
scripting.SendCommand("second level password");

// now detect prompt should work.
scripting.DetectPrompt();

// since you may be using your own detect prompt you may need
// to call it instead of a rebex`s DetectPrompt
// DetectPrompt(scripting);

// do the work here...

Comments

Many thanks, it worked.