There are more questions unfortunately...
What was updated?
How are you doing the redirection?
Have you looked at the log entries on 174.56.50.42 to see why the redirection to prod?
check output of host command:
Code:
host 174.56.50.42
host 174.56.37.45
Should be different...
Is SSH enabled on prod and dev? If so, if you SSH to their IPs do you get to correct machines?