Enable port forwarding using this simple python script.

Forwarding.py

#/usr/bin/python
# if yes or no doesn't work try using quotes
# example 'yes' or 'no'



import os
import sys



print('\n'*2)
print('If yes and no throws an error try using quotes.')
print('Example "Yes" or "no" or "Yeah"')
print('\n'*2)
while True:
    try:
        fo = open('/proc/sys/net/ipv4/ip_forward','r')
        print('*******************************************************************')
        print('Current value inside the file is: ')
        print(fo.read())
        print('Enable or Disable port Forwarding.')
        x1 = input('To continue type Y and to end press N.''\n')
        y = str(x1)
        x = y.lower()
        
        

        if x[0] == 'y' and (x == 'yes' or x == 'yup' or x == 'yeah' or x == 'ya' or x =='yo' or x == 'y') and len(x)<=4:
            fo1 = open('/proc/sys/net/ipv4/ip_forward','w')
            print('\n'*1)
            print('Please enter either 0 or 1\n\n0 = port forwarding disabled\n1 = port forwarding enabled')
            print('\n'*1)
            n = int(input('Please enter the value''\n'))
        
            if n == 0:
                fo1.write('0')
                fo1.close()
                print('\n'*1)
                print('Port forwarding is disabled.')
                print('*******************************************************************')
                break
            elif n == 1:
                fo1.write('1')
                fo1.close()
                print('\n'*1)
                print('Port forwarding is enabled.')
                print('*******************************************************************')
                break
            else:
                print('\n'*1)
                print('Wrong value, Try again')
                print('Only 0 and 1 is accepted')
                print('\n'*1)
                print('Resetting Program')
                
       
        elif x[0] == 'n' and len(x)<=5 and (x == 'no' or x == 'nope' or x == 'nahh' or x == 'nopes' or x == 'n'):
            print('\n'*1)
            print('Quitting.........')
            print('*******************************************************************')
            break
        else:
            print('\n'*1)
            print('Please either type yes or no')
            print('Resetting Program')
    
    except Exception as e: #Exception Block
        print('You encountered an error: ',str(e))
        print('Resetting Program')
        print('Please Try again')
        print('\n'*1)
        print('*******************************************************************')