Re: Automatic ssh connections

• Previous message: Milen Minev: "Re: Automatic ssh connections"
• In reply to: Benkirane Youssef: "Automatic ssh connections"
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Date: Mon, 15 Mar 2004 09:25:11 +0900 (JST)
To: youssef.benkirane@mystream.fr

> From: "Benkirane Youssef" <youssef.benkirane@mystream.fr>
> Subject: Automatic ssh connections
> Date: Fri, 12 Mar 2004 18:44:25 +0100
> Message-ID: <002301c40859$a955a390$691ac289@Youssef>

> Hi,
>  
> I want to make a script to make automatic ssh connections to cisco routers,
> to modify their configuration dynamically.
> For this purpose, I will use a file which stores the ssh passwords for each
> router, and my script will use this file to log to the routers.
> But the problem is when you connect with the openssh client, you must enter
> the password in the tty.
>  
> Does anyone knows how to modify openssh client configuration or source code,
> so he can read the password from a file.

I recommend you to use the "expect".
  -> see: http://expect.nist.gov/

Following is my simple example script.
(But I have no environment to test my code.)

---------------------- sample script ----------------------
#!/usr/local/bin/expect -f

set timeout 10

set pwdfile [open "/hogehoge/passwords" "r"]

set ssh "/usr/bin/ssh"
#set ssh "/usr/local/bin/ssh"

while { [gets $pwdfile line] != -1 } {
        set target_ip [lindex $line 0]
        set hostname [lindex $line 1]
        set login_pass [lindex $line 2]
        set enable_pass [lindex $line 3]
        #
        set prompt [append $hostname ">"]
        set prompt_ena [append $hostname "#"]
        set prompt_conf [append $hostname "(config)#"]

        # to skip the comment line
        if { [string compare $target_ip "#"] == 0 } continue;

        puts "DEBUG: IP = $target_ip"

        spawn $ssh $target_ip

        expect "Password:"
        send "$login_pass\r"

        expect {
                "$prompt" {
                        send "ena\r"

                        expect "password:"
                        send "$enable_pass\r"

                        expect {
                                "$prompt_ena" {
                                        send "conf t\r"

                                        # place the code here to modify
                                        # the configuration
                                }
                        }
                }
        }

        send "exit\r"
}

close $pwdfile
----------------- end of sample script --------------

----------------- /hogehoge/passwords ----------------
# IP address hostname login pwd enable pwd
192.168.0.1 sun sierjnd eksienc
192.168.0.2 mercury xirnjfu jelfnse
192.168.0.3 venus viheuwg wqpvjmw
192.168.0.4 earth bldjwng sikwfjh
192.168.0.5 mars digvufj gpikdue
----------------- end of /hogehoge/passwords ----------------

• Previous message: Milen Minev: "Re: Automatic ssh connections"
• In reply to: Benkirane Youssef: "Automatic ssh connections"
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