Here we can test a socket without netstat telnet and so on

test-socket.py

#!/bin/python 
#For socket checking in case no tools around except python 
import socket
import sys

if len(sys.argv) != 3:
  print("Usage: " +  sys.argv[0] + " <IP or Name> <Port>")
  sys.exit(2)

s = socket.socket()
address = str(sys.argv[1])
port = int(sys.argv[2])  # port number is a number, not string

ipaddress = socket.gethostbyname(sys.argv[1])
print("IPaddress checked is " + ipaddress + " " + str(port) )

result = s.connect_ex((address, port))
s.close()
if result:
  print("Problem with socket!")
else:
  print("Socket ok!")
  print("Returnvalue is " + str(result))