| 1 |
I've been Googling for a few hours looking for information from |
| 2 |
anyone actually using syn cookies in a production system. We'd been hit |
| 3 |
with a few syn floods recently and were looking at a number of ways to |
| 4 |
stop them. |
| 5 |
|
| 6 |
From my research it appears that syn cookies should not affect the |
| 7 |
TCP session. There are some references to syn cookies causing slow downs |
| 8 |
with SMTP and ftp, but nothing really concrete. Also most of the info is |
| 9 |
from 2001 when 2.4 came out and syn cookies were linked with the newer |
| 10 |
iptables code. Was looking for case studies and hard stats. |
| 11 |
|
| 12 |
I'd like to hear from anyone running web server farms that has syn |
| 13 |
cookies turned on. Ideally you'd be pushing a fair amount of traffic or |
| 14 |
have 1k concurrent users per server at some point so I know it'll scale. |
| 15 |
Did you have any problems, weird firewalls blocking your servers, latency |
| 16 |
connection to the server, load balancers didn't like it, weird connections |
| 17 |
that hung around forever, and so forth. |
| 18 |
|
| 19 |
Thanks in advance, |
| 20 |
kashani |
Archives