Help with connectivity test using shell script

Shell Programming and Scripting
1

I want to test connectivity between different servers with my server using information as IP and port only.
I have Name,IP List and port in one file. Please help how i can test connectivity is successful or not?

File format will be:
Name1,127.0.0.1,80
Name2,127.0.0.2,8080

Output could be
Name1, Successful
Name2, Unsuccessful

I have prepare the code which uses curl and execute complete URL which is as follows:

##############code####################

for url in $(awk -F"," '{print $3}' cp_urls.txt)
do
  curl -s -o "/dev/null" $url
  if [ $? -eq 0 ] ; then
    echo "$url = running"
  else
    echo "$url = not running"
  fi
done

################emd####################

But i don't want to test connectivity with complete url as it provides the hit to url,but using IP and port number specified in file.
Please suggest.

2

You can probably use

telnet <IP> <port no>

If you see message "connected to host" then the port is listening. If it says "unable to connect" then the port is not listening.