Testing telnet connections in a script


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Testing telnet connections in a script
# 1  
Old 01-12-2007
Testing telnet connections in a script

Hi,

I am trying to figure out how to test to see if a server is accepting telnet connections via a script.

I have several remote MPE servers that are set in single user mode (and hence not accepting telnet connections), for their backups, I want to try and automate a test (from a unix server), to see if telnet connections are available and hence if the servers are still in single user mode.

Hmm ... not sure how clear that was ... I basically want to do something like this:

while true
do
telnet <server_name> > richtmp &
echo $! > richtmp.PID
***some kind of grep thing on 'richtmp' to see if the connection worked***
kill `cat richtmp.PID`
sleep 60
done


.... but more elegantly. Is there an option to the telnet command that will do this?

many thanks,

Richard
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

Assistance with testing ssh connections and what the return codes mean

Hello Forum, I'm using a bit of code from a script I found that allows me to capture the status code of connecting via SSH to remote servers: ssh -qno StrictHostKeyChecking=no -o ConnectTimeout=1 user@$InputIP 'ls -l /home/user >/dev/null 2>&1' > /dev/null 2>&1 status="$(echo $?)" echo... (4 Replies)
Discussion started by: greavette
4 Replies

2. Shell Programming and Scripting

Could you help me writing a script showing which network connections are currently active?

Could you help me writing a script showing which network connections are currently active? Means output should be something like: "eth0, wlan1, wlan3" Problem: The output is supposed to happen on a 16x2 LCD Display. Currently I am doing a "Ifconfig" as output, but its too fast for the... (2 Replies)
Discussion started by: lordofazeroth
2 Replies

3. Shell Programming and Scripting

Using shell script to compare files and retrieve connections

Hello, I want to use shell script to generate network files (I tried with python but its taking too long). I have a list of nodes: node.txt LOC_Os11g37970 LOC_Os01g07760 LOC_Os03g19480 LOC_Os11g45740 LOC_Os06g08290 LOC_Os07g02800 I have an edge-list as well: edge.txt Source_node ... (2 Replies)
Discussion started by: Sanchari
2 Replies

4. Shell Programming and Scripting

ksh script to test max number of parallel ssh connections

hello , I need to check how many parallel ssh connections my server can take the load of. I need to login to different host which i am planning to read from a file and then a write a loop which will do parallel ssh. Please provide suggestion on how i can write script for the same.\ Thank... (1 Reply)
Discussion started by: ABHIKORIA
1 Replies

5. UNIX for Dummies Questions & Answers

Shell script to collect inbound connections

Hi Kindly provide me shell script on server to collect inbound connections, using port number on Linux. (4 Replies)
Discussion started by: adminhelp
4 Replies

6. Shell Programming and Scripting

How to create DB2 Connections in While loop using shell script

Hi , I have to create a db2 connection for the while loop in shell scripting. Below is the connection for DB2 I have to establish connect to TABLESCHENMA user $USERID using $PASSWORD Below is the while loop. while read TABLE; do db2 LOAD CLIENT FROM $DIRECTORY/$TABLE.ixf OF ixf INSERT... (1 Reply)
Discussion started by: vikyalex4
1 Replies

7. Shell Programming and Scripting

Expect/telnet/testing tacacs on a cisco

At times I find the need to test that the tacacs port 49 is open. The code below works but is painfully slow because I have to wait on the timeouts. Examples of possible responds router1#telnet 10.11.20.14 49 Trying 206.112.204.140, 49 ... Open route1#telnet 10.11.19.14 49 Trying... (1 Reply)
Discussion started by: popeye
1 Replies

8. Shell Programming and Scripting

Script to block IP with too many connections

Hello everyone. I'd really appreciate some help on this since someone is ddosing or doing something to cause our server to overload. It happens once a day and always from the same isp. I've reported it to abuse email of this isp but they don't seem to care. It happens once a day. And... (0 Replies)
Discussion started by: thesting
0 Replies

9. Shell Programming and Scripting

A bi directional script that will monitor the TCP/IP connections between two physical

Dear All , I'm looking for a unix script that will monitor the TCP/IP connections between two physical ip addresses and when it dectes an IP is down it generates an alarm and sends SMS to mobile numbers. Can any one help, I need this urgently. Waiting for positive replies.. ... (3 Replies)
Discussion started by: samura
3 Replies

10. Solaris

rlogin, telnet connections timeout

Hi, I have a Sun Ultra 5 desktop with Solaris 8. When I telnet/rlogin into any other host, the connection closes after few hours of inactivity. I also have another Windows box which I use rarely. But when I telnet/rlogin into the same hosts using putty, the connection stays for days without any... (5 Replies)
Discussion started by: dr_gsb
5 Replies
Login or Register to Ask a Question
saslfinger(1)						      General Commands Manual						     saslfinger(1)

NAME
saslfinger - A utility to collect SMTP AUTH relevant configuration for Postfix SYNOPSIS
saslfinger [-chs] DESCRIPTION
saslfinger is a utility to collect SMTP AUTH relevant configuration for Postfix. Depending on how you run it, it will search for informa- tion on server-side or client-side SMTP AUTH configuration settings in Postfix and Cyrus SASL. OPTIONS
-c If you run saslfinger with the option -c it will collect data required for client-side SMTP AUTH. Client-side SMTP AUTH is when Postfix smtp daemon uses SMTP AUTH to authenticate itself with a remote mail server that offers SMTP AUTH. saslfinger will try to telnet to all hosts listed in smtp_sasl_password_maps, if it may read smtp_sasl_password_maps The telnet test verifies your host is able to reach the remote servers and shows what AUTH mechanisms they offer - in some cases this is required to debug client-side SMTP AUTH. Important: By default smtp_sasl_password_maps must be read-only to root, since these maps contain the usernames and passwords to authenticate. If you run saslfinger as root access will be no problem, but saslfinger will fail if you lack the permissions to access smtp_sasl_password_maps. If you want to run the telnet test, but don't want to run saslfinger as root change permissions of smtp_sasl_password_maps so that the user running saslfinger may access smtp_sasl_password_maps while you debug. *note: You don't need to worry about saslfinger doing anything with the username or password stored next to the remote hosts in your smtp_sasl_password_maps; saslfinger completely ignores these informations! -h If you run saslfinger with the option -h it will print a little help message that tells you about the options you can use. -s If you run saslfinger with the option -s it will collect data required for server-side SMTP AUTH. Server-side SMTP AUTH is when Postfix smtpd daemon offers SMTP AUTH to mail clients. FILES
saslfinger - the script you need to run. saslfinger.1 - the man page you are currently reading. AUTHOR
Patrick Koetter, <patrick.koetter@state-of-mind.de>, http://www.state-of-mind.de You will find the newest version of saslfinger at http://postfix.state-of-mind.de/patrick.koetter/saslfinger/. BUGS
Please report bugs to <patrick.koetter@state-of-mind.de> Manuals User saslfinger(1)