Net/telnet haning on pasword

Sadaf_N · August 8, 2013, 12:22pm

Hello all,
I’m getting stuck at the @password portion. This script will get into
the Cisco ASA, but doesn’t seem to enter in the password. Any help is
greatly appreciated.

begin
session = Net::Telnet::new(‘Host’ => @hostname, ‘Timeout’ => 10,
‘Telnetmode’ => false, verbose: :debug)
session.waitfor(‘Prompt’ => /Username/)
session.cmd(@username) { |c| print c }
session.waitfor(‘Prompt’ => /Password/)
session.cmd(@password) { |c| print c }
session.waitfor(/>/)
session.cmd(@cmd + ‘\n’) { |c| print c }
session.close

end

Debug output:

arozar
Password: Uncaught exception: timed out while waiting for more data
/Users/averyrozar/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/net/telnet.rb:558:in
waitfor' /Users/averyrozar/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/net/telnet.rb:695:incmd’
/Users/averyrozar/Ruby-Scripts/tools/telnet-tool.rb:44:in `<top
(required)>’

Process finished with exit code 0

arozar · August 8, 2013, 6:20pm

Is the prompt “Username” correct? It seems like its getting stuck there
not
recieving the value you told it to expect.

Make sure your prompt matches.

IMHO consider switching to SSH. I have found it just easier to work in.
You
still need to set the proper prompt. This is what mine looks like.

github.com

crosson/ssh/blob/master/ssh.rb

require 'rubygems'
require 'net/ssh'
require 'net/ssh/telnet'

class SSH
  attr_accessor :errors
  
  def initialize(creds)
    begin
      creds[:user] ||= creds[:username]
      creds[:host] ||= creds[:hostname]
      
      @ssh_session = Net::SSH.start(creds[:host], creds[:user], :password => creds[:password], :keys => [])
      @ssh = Net::SSH::Telnet.new("Session" => @ssh_session, "Prompt" => creds[:prompt])
      @errors = false
    rescue Exception => e
      @errors = e
    end
  end

This file has been truncated. show original

creds[:prompt] = /.>|.#/

arozar · August 9, 2013, 11:09am

Username did not match 100%, so I did add a : and space. But I still get
the same results. I’m also trying SSH, and I do get authenticated and
logged in. But it errors out when trying to issue the command. I will
look at what you have and see if I can figure out what I’m doing wrong.

Here is what I have for ssh, then the debug.

begin
session = Net::SSH.start(@hostname, @username, :password =>
@password, :encryption => “aes256-cbc”, :host_key => “ssh-rsa”, :verbose
=> :debug)
session.open_channel do |chan|

  chan.send_channel_request('shell') do |ch, success|
    if !success
      abort 'Could not open shell channel'
    else
      ch.on_data do |chn, data|
       puts data
       check_and_send(chn)
      end
    end
  end
end

session.exec(@cmd + '\n') do |success|
  if success
    puts 'command worked'
  else
    puts 'no go'
  end
end
session.close

end

D, [2013-08-09T05:05:55.141342 #1862] DEBUG –
net.ssh.transport.session[3fe1fd8a43f4]: establishing connection to
172.16.1.1:22
D, [2013-08-09T05:05:55.142325 #1862] DEBUG –
net.ssh.transport.session[3fe1fd8a43f4]: connection established
I, [2013-08-09T05:05:55.142515 #1862] INFO –
net.ssh.transport.server_version[3fe1fd8a23c4]: negotiating protocol
version
D, [2013-08-09T05:05:55.143593 #1862] DEBUG –
net.ssh.transport.server_version[3fe1fd8a23c4]: remote is
SSH-2.0-Cisco-1.25' D, [2013-08-09T05:05:55.143712 #1862] DEBUG -- net.ssh.transport.server_version[3fe1fd8a23c4]: local isSSH-2.0-Ruby/Net::SSH_2.6.8 x86_64-darwin11.2.0’
D, [2013-08-09T05:05:56.770385 #1862] DEBUG – tcpsocket[3fe1fd8a3774]:
read 280 bytes
D, [2013-08-09T05:05:56.770585 #1862] DEBUG – tcpsocket[3fe1fd8a3774]:
received packet nr 0 type 20 len 276
I, [2013-08-09T05:05:56.770678 #1862] INFO –
net.ssh.transport.algorithms[3fe1fd8940f8]: got KEXINIT from server
I, [2013-08-09T05:05:56.770870 #1862] INFO –
net.ssh.transport.algorithms[3fe1fd8940f8]: sending KEXINIT
D, [2013-08-09T05:05:56.773809 #1862] DEBUG – tcpsocket[3fe1fd8a3774]:
queueing packet nr 0 type 20 len 1620
D, [2013-08-09T05:05:56.774001 #1862] DEBUG – tcpsocket[3fe1fd8a3774]:
sent 1624 bytes
I, [2013-08-09T05:05:56.774068 #1862] INFO –
net.ssh.transport.algorithms[3fe1fd8940f8]: negotiating algorithms
D, [2013-08-09T05:05:56.774295 #1862] DEBUG –
net.ssh.transport.algorithms[3fe1fd8940f8]: negotiated:

kex: diffie-hellman-group1-sha1
host_key: ssh-rsa
encryption_server: aes256-cbc
encryption_client: aes256-cbc
hmac_client: hmac-sha1
hmac_server: hmac-sha1
compression_client: none
compression_server: none
language_client:
language_server:
D, [2013-08-09T05:05:56.774346 #1862] DEBUG –
net.ssh.transport.algorithms[3fe1fd8940f8]: exchanging keys
D, [2013-08-09T05:05:56.777016 #1862] DEBUG – tcpsocket[3fe1fd8a3774]:
queueing packet nr 1 type 30 len 140
D, [2013-08-09T05:05:56.777141 #1862] DEBUG – tcpsocket[3fe1fd8a3774]:
sent 144 bytes
D, [2013-08-09T05:05:56.842775 #1862] DEBUG – tcpsocket[3fe1fd8a3774]:
read 448 bytes
D, [2013-08-09T05:05:56.843002 #1862] DEBUG – tcpsocket[3fe1fd8a3774]:
received packet nr 1 type 31 len 444
D, [2013-08-09T05:05:56.848112 #1862] DEBUG – tcpsocket[3fe1fd8a3774]:
queueing packet nr 2 type 21 len 20
D, [2013-08-09T05:05:56.848232 #1862] DEBUG – tcpsocket[3fe1fd8a3774]:
sent 24 bytes
D, [2013-08-09T05:05:56.848315 #1862] DEBUG – tcpsocket[3fe1fd8a3774]:
read 16 bytes
D, [2013-08-09T05:05:56.848445 #1862] DEBUG – tcpsocket[3fe1fd8a3774]:
received packet nr 2 type 21 len 12
D, [2013-08-09T05:05:56.848873 #1862] DEBUG –
net.ssh.authentication.session[3fe1fd4d83ec]: beginning authentication
of arozar' D, [2013-08-09T05:05:56.849119 #1862] DEBUG -- tcpsocket[3fe1fd8a3774]: queueing packet nr 3 type 5 len 28 D, [2013-08-09T05:05:56.849232 #1862] DEBUG -- tcpsocket[3fe1fd8a3774]: sent 52 bytes D, [2013-08-09T05:05:56.850632 #1862] DEBUG -- tcpsocket[3fe1fd8a3774]: read 52 bytes D, [2013-08-09T05:05:56.850808 #1862] DEBUG -- tcpsocket[3fe1fd8a3774]: received packet nr 3 type 6 len 28 D, [2013-08-09T05:05:56.850978 #1862] DEBUG -- net.ssh.authentication.session[3fe1fd4d83ec]: trying none D, [2013-08-09T05:05:56.851078 #1862] DEBUG -- net.ssh.authentication.session[3fe1fd4d83ec]: Mechanism none was requested, but isn't a known type. Ignoring it. D, [2013-08-09T05:05:56.851123 #1862] DEBUG -- net.ssh.authentication.session[3fe1fd4d83ec]: trying publickey D, [2013-08-09T05:05:56.851252 #1862] DEBUG -- net.ssh.authentication.agent[3fe1fd4d18a8]: connecting to ssh-agent D, [2013-08-09T05:05:56.851395 #1862] DEBUG -- net.ssh.authentication.agent[3fe1fd4d18a8]: sending agent request 1 len 51 D, [2013-08-09T05:05:56.851545 #1862] DEBUG -- net.ssh.authentication.agent[3fe1fd4d18a8]: received agent packet 2 len 5 D, [2013-08-09T05:05:56.851612 #1862] DEBUG -- net.ssh.authentication.agent[3fe1fd4d18a8]: sending agent request 11 len 0 D, [2013-08-09T05:05:56.851727 #1862] DEBUG -- net.ssh.authentication.agent[3fe1fd4d18a8]: received agent packet 12 len 5 D, [2013-08-09T05:05:56.851784 #1862] DEBUG -- net.ssh.authentication.session[3fe1fd4d83ec]: trying hostbased D, [2013-08-09T05:05:56.851888 #1862] DEBUG -- net.ssh.authentication.agent[3fe1fd4d18a8]: sending agent request 11 len 0 D, [2013-08-09T05:05:56.851983 #1862] DEBUG -- net.ssh.authentication.agent[3fe1fd4d18a8]: received agent packet 12 len 5 D, [2013-08-09T05:05:56.852037 #1862] DEBUG -- net.ssh.authentication.session[3fe1fd4d83ec]: trying password D, [2013-08-09T05:05:56.852212 #1862] DEBUG -- tcpsocket[3fe1fd8a3774]: queueing packet nr 4 type 50 len 76 D, [2013-08-09T05:05:56.852332 #1862] DEBUG -- tcpsocket[3fe1fd8a3774]: sent 100 bytes D, [2013-08-09T05:05:56.854618 #1862] DEBUG -- tcpsocket[3fe1fd8a3774]: read 36 bytes D, [2013-08-09T05:05:56.854827 #1862] DEBUG -- tcpsocket[3fe1fd8a3774]: received packet nr 4 type 52 len 12 D, [2013-08-09T05:05:56.854990 #1862] DEBUG -- net.ssh.authentication.methods.password[3fe1fd4cbebc]: password succeeded D, [2013-08-09T05:05:56.855271 #1862] DEBUG -- tcpsocket[3fe1fd8a3774]: queueing packet nr 5 type 90 len 44 D, [2013-08-09T05:05:56.855434 #1862] DEBUG -- tcpsocket[3fe1fd8a3774]: queueing packet nr 6 type 90 len 44 I, [2013-08-09T05:05:56.855504 #1862] INFO -- net.ssh.connection.session[3fe1fd4c727c]: closing remaining channels (2 open) D, [2013-08-09T05:05:56.855703 #1862] DEBUG -- tcpsocket[3fe1fd8a3774]: sent 136 bytes D, [2013-08-09T05:05:56.857500 #1862] DEBUG -- tcpsocket[3fe1fd8a3774]: read 52 bytes D, [2013-08-09T05:05:56.857772 #1862] DEBUG -- tcpsocket[3fe1fd8a3774]: received packet nr 5 type 91 len 28 I, [2013-08-09T05:05:56.857899 #1862] INFO -- net.ssh.connection.session[3fe1fd4c727c]: channel_open_confirmation: 0 3 1024 4096 I, [2013-08-09T05:05:56.857996 #1862] INFO -- net.ssh.connection.channel[3fe1fd4c7150]: sending channel request "shell" D, [2013-08-09T05:05:56.858143 #1862] DEBUG -- tcpsocket[3fe1fd8a3774]: queueing packet nr 7 type 98 len 28 D, [2013-08-09T05:05:56.858302 #1862] DEBUG -- tcpsocket[3fe1fd8a3774]: sent 52 bytes D, [2013-08-09T05:05:56.858397 #1862] DEBUG -- tcpsocket[3fe1fd8a3774]: read 52 bytes D, [2013-08-09T05:05:56.858524 #1862] DEBUG -- tcpsocket[3fe1fd8a3774]: received packet nr 6 type 92 len 28 E, [2013-08-09T05:05:56.858634 #1862] ERROR -- net.ssh.connection.session[3fe1fd4c727c]: channel_open_failed: 1 4 Uncaught exception: (4) /Users/averyrozar/.rvm/gems/ruby-1.9.3-p0/gems/net-ssh-2.6.8/lib/net/ssh/connection/channel.rb:524:indo_open_failed’
/Users/averyrozar/.rvm/gems/ruby-1.9.3-p0/gems/net-ssh-2.6.8/lib/net/ssh/connection/session.rb:545:in
channel_open_failure' /Users/averyrozar/.rvm/gems/ruby-1.9.3-p0/gems/net-ssh-2.6.8/lib/net/ssh/connection/session.rb:459:indispatch_incoming_packets’
/Users/averyrozar/.rvm/gems/ruby-1.9.3-p0/gems/net-ssh-2.6.8/lib/net/ssh/connection/session.rb:216:in
preprocess' /Users/averyrozar/.rvm/gems/ruby-1.9.3-p0/gems/net-ssh-2.6.8/lib/net/ssh/connection/session.rb:200:inprocess’
/Users/averyrozar/.rvm/gems/ruby-1.9.3-p0/gems/net-ssh-2.6.8/lib/net/ssh/connection/session.rb:164:in
block in loop' /Users/averyrozar/.rvm/gems/ruby-1.9.3-p0/gems/net-ssh-2.6.8/lib/net/ssh/connection/session.rb:164:inloop’
/Users/averyrozar/.rvm/gems/ruby-1.9.3-p0/gems/net-ssh-2.6.8/lib/net/ssh/connection/session.rb:164:in
loop' /Users/averyrozar/.rvm/gems/ruby-1.9.3-p0/gems/net-ssh-2.6.8/lib/net/ssh/connection/session.rb:113:inclose’
/Users/averyrozar/Ruby-Scripts/tools/ssh-tool.rb:67:in `<top
(required)>’

Process finished with exit code 0

arozar · August 9, 2013, 11:54am

I wonder if ruby-lang is a place to talk about specific gems? I
unsubscribed because of that but now receiving the list again,
automagically

arozar · August 9, 2013, 11:58am

Alex aka Sinm wrote in post #1118197:

I wonder if ruby-lang is a place to talk about specific gems? I
unsubscribed because of that but now receiving the list again,
automagically

What? Not sure I’m picking up what your throwing down…

arozar · August 9, 2013, 11:57am

The same:(

arozar · August 9, 2013, 12:22pm

Sorry guys, i think i’m receiving only part of messages. The mess.
Trying to unsubscribe again

arozar · August 9, 2013, 6:10pm

I had the same problems you have. Use Net::SSH::Telnet to abstract out
of
the confusion of channels etc. See my example.

arozar · August 9, 2013, 7:22pm

Cliff R. wrote in post #1118266:

I had the same problems you have. Use Net::SSH::Telnet to abstract out
of
the confusion of channels etc. See my example.

I did notice you where using that, I did a “gem search net::ssh::telnet”
but could not find anything. Is this a local install or something?

arozar · August 9, 2013, 7:25pm

never mind, found it.

gem install net-ssh-telnet

Thanks for your help.