String Replacement for OTP and password?

I have two Url where i need to replace otp and password and only not other things in url. http://somedomain.com/SendSMS/sendmsg.php?uname=user1&pass=pass&send=SYSTEM&dest=9876543210&msg=Your One Time Password(OTP) is 6655544. http://somedomain.com/SendSMS/sendmsg.php?uname=user1&pass=pass&send=SYSTEM&dest=9876543210&msg=Your Account User ID –…

DDoS Protection

If I have a rack of servers with 2 carriers, my own ASN and /21 of IPs. What is best method of providing DDoS protection to my customers? Bu… |…