[Twisted-Python] My twisted web server fall down

[Muaaz Hussain]

Dear all,
I ran penetration testing tool against my twisted web server , the
tool used to make a huge number of threads, all that threads make a
connection to the twisted concurrently.
when I made the number of threads more than 1024 the twisted web
server eventually has fall down.
is there any method to let the twisted web server to limit the
concurrent connection per second or per host.