Why won't telnet let me finish the request?

Question

linux

Hello everyone, maybe my question will seem silly, but I didn’t manage to google the answer. I started to deal with the telnet utility, I connect to the site, everything is fine, I type the first line of the request (GET / HTTP/1.1), I start typing the second one, and the connection is interrupted or sent at that time and a response arrives with a 400 error (I don’t have time to send the header host). However, when I insert both query strings at once, everything is fine. What could be the problem?

Answer 1

How fast are you typing? Maybe you have a connection timeout set on the server side, for which you do not have time to dial?

Answer 2

Perhaps in the server timeout settings, because in theory everything should work as you describe ...

Answer 3

All web servers have 2 twists - connection lifetime, request waiting time from a connected client.
Nginx defaults to 60 seconds "between lines", for example.
Many administrators twist this figure to a minimum in order to protect themselves from an attack like "slow clients" - when a crowd of bots sits and sends a request line by line every 55 seconds (thereby clogging the web server queue towards clients). This is especially true for those who are Apaches sticking out into the world.