Check if the remote proxy is down, and restart your connection.

check_restart_cntlm.sh

#!/usr/bin/env bash

log(){
	#See "$ man logger"
	logger -i -t "CR-CNTLM" "[User:$(whoami)] $1"
}


##TODO: Impl system count of unsuccessful restarts (Redis?)
##MUST BE ROOT
go_horse(){
	service cntlm restart
	run_analyze
}



#Sanity check (supposing you're using POSIX based system :)
command -v http >/dev/null 2>&1 || { log >&2 "I require HTTPie(https://github.com/jkbrzt/httpie) but it's not installed.  Aborting."; exit 1; }

## Perform an analysis of current internet connection, and retry to reconnect
run_analyze(){
	if http --check-status --ignore-stdin --timeout=5 HEAD http://www.google.com.br &> /dev/null; then
	    log 'Proxy OK!'
	else
	    case $? in
	        2) log 'Request timed out!' && go_horse;;
	        3) log 'Unexpected HTTP 3xx Redirection!' ;;
	        4) log 'HTTP 4xx Client Error!' && go_horse ;;
	        5) log 'HTTP 5xx Server Error!' && go_horse ;;
	        *) log 'Other Error!' && go_horse;;
	    esac
	fi	
}


run_analyze