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Top Forums Shell Programming and Scripting Telnet Bash Script (Connection closed by foreign host.) Post 302911671 by jeetz on Saturday 2nd of August 2014 12:04:19 PM
Old 08-02-2014
Telnet Bash Script (Connection closed by foreign host.)

Hello Everyone,

My following script is giving me problems, when the SIP trunk goes down and the telnet session is started and just when the command is about to complete the connection is closed then script restarts.

I have noticed that as soon the script types in "sys re" or "sys rebo" or "sys reb" the connection is closed.


Code:
#!/bin/bash
typeset -i interval=5
run=true
trunk=vonage
reboot=0
while [[ "$run" == "true" ]]; do
checktrunk=$(asterisk -rx "sip show peer $trunk" | grep -c "Status.*OK")
if [[ $checktrunk -eq 0 ]]; then
echo "$(date): SIP trunk registration failed."
sleep 2
{
sleep 2
echo admin
sleep 2
echo password
sleep 2
echo sys reboot
echo exit
} | telnet 192.168.1.1 
(( reboot +=1 ))
if (( reboot == 3 )); then
echo "$(date): Maximum 3 retries failed. Next retry after 10 mins."
sleep 600
reboot=0
fi
else
echo "$(date): SIP trunk registration OK."
fi
sleep 5
done
exit 1

Hope someone helps over this issue. Thanks!
 

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FENCE_AGENT(8)						      System Manager's Manual						    FENCE_AGENT(8)

NAME
fence_apc - Fence agent for APC over telnet/ssh DESCRIPTION
fence_apc is an I/O Fencing agent which can be used with the APC network power switch. It logs into device via telnet/ssh and reboots a specified outlet. Lengthy telnet/ssh connections should be avoided while a GFS cluster is running because the connection will block any necessary fencing actions. fence_apc accepts options on the command line as well as from stdin. Fenced sends parameters through stdin when it execs the agent. fence_apc can be run by itself with command line options. This is useful for testing and for turning outlets on or off from scripts. Vendor URL: http://www.apc.com PARAMETERS
-o, --action=<action> Fencing Action (Default Value: reboot) -a, --ip=<ip> IP Address or Hostname This parameter is always required. -l, --username=<name> Login Name This parameter is always required. -p, --password=<password> Login password or passphrase -S, --password-script=<script> Script to retrieve password -x, --ssh SSH connection -n, --plug=<id> Physical plug number or name of virtual machine This parameter is always required. -k, --identity-file=<filename> Identity file for ssh -s, --switch=<id> Physical switch number on device -4, --inet4-only Forces agent to use IPv4 addresses only -6, --inet6-only Forces agent to use IPv6 addresses only -u, --ipport=<port> TCP port to use for connection with device -v, --verbose Verbose mode -D, --debug-file=<debugfile> Write debug information to given file -V, --version Display version information and exit -h, --help Display help and exit -C, --separator=<char> Separator for CSV created by operation list (Default Value: ,) --power-timeout Test X seconds for status change after ON/OFF (Default Value: 20) --shell-timeout Wait X seconds for cmd prompt after issuing command (Default Value: 3) --login-timeout Wait X seconds for cmd prompt after login (Default Value: 5) --power-wait Wait X seconds after issuing ON/OFF (Default Value: 0) --delay Wait X seconds before fencing is started (Default Value: 0) --retry-on Count of attempts to retry power on (Default Value: 1) ACTIONS
on Power on machine. off Power off machine. reboot Reboot machine. status This returns the status of the plug/virtual machine. list List available plugs with aliases/virtual machines if there is support for more then one device. Returns N/A otherwise. monitor Check if fencing device is running. List available plugs/virtual machines or get status of machine (if it does not support more). metadata The operational behavior of this is not known. STDIN PARAMETERS
action Fencing Action (Default Value: reboot) ipaddr IP Address or Hostname This parameter is always required. login Login Name This parameter is always required. passwd Login password or passphrase passwd_script Script to retrieve password secure SSH connection port Physical plug number or name of virtual machine This parameter is always required. identity_file Identity file for ssh switch Physical switch number on device inet4_only Forces agent to use IPv4 addresses only inet6_only Forces agent to use IPv6 addresses only ipport TCP port to use for connection with device verbose Verbose mode debug Write debug information to given file version Display version information and exit help Display help and exit separator Separator for CSV created by operation list (Default Value: ,) power_timeout Test X seconds for status change after ON/OFF (Default Value: 20) shell_timeout Wait X seconds for cmd prompt after issuing command (Default Value: 3) login_timeout Wait X seconds for cmd prompt after login (Default Value: 5) power_wait Wait X seconds after issuing ON/OFF (Default Value: 0) delay Wait X seconds before fencing is started (Default Value: 0) retry_on Count of attempts to retry power on (Default Value: 1) fence_apc (Fence Agent) 2009-10-20 FENCE_AGENT(8)
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