I'm using HAP on and off for a bit now and now I'm trying confgure DDoS protection per frontend, to block a connection for 5 mints, if it receives more than 200 requests per second from the same source IP, taking the fact into account that mutiple source-ips can/will be used to launch the attack. I looked into various blogposts and posts in the Internet and more I see I get more confused about the correct counfig that I need to have for my purpose.
Below are the all the configurations that I have collected so far:
backend ip_rates_abuse
stick-table type ip size 200k expire 5m store gpc0,conn_cur,conn_rate(10s),http_req_rate(10s),http_err_rate(10s)
frontend fe_dev_mydomain_com
.....
## ----- TCP Layer DDoS protection ------------ ##
timeout tarpit 15s
tcp-request inspect-delay 5s
#
tcp-request content reject if { src_conn_rate(ip_rates_abuse) ge 200 }
tcp-request content reject if { src_conn_cur(ip_rates_abuse) ge 500 }
tcp-request content reject if { src_get_gpc0(ip_rates_abuse) gt 0 }
tcp-request session track-sc0 src table ip_rates_abuse
#
## ----- Application Layer DDoS protection ------------ ##
acl too_many_reqs sc_http_req_rate(0) gt 200
http-request track-sc1 src table ip_rates_abuse
http-request set-var(txn.ratelimited) str(RATE-LIMITED) if too_many_reqs
http-request capture var(txn.ratelimited) len 12
http-request deny deny_status 429 if too_many_reqs
.....
use_backend be_waf if no_tarpit || tarpit_max_capacity
and then in the backend:
backend be_waf
acl too_many_clicks sc1_http_req_rate gt 200
acl mark_as_abuser sc0_inc_gpc0(ip_rates_abuse) gt 0
tcp-request content track-sc1 src table ip_rates_abuse
tcp-request content reject if too_many_clicks mark_as_abuser
.....
I'm pretty sure I didn't understand a number of things but did I do it right? Looks like a bit overdoing to me and seems not working either. Can anyone suggest me the minimum config that I should have to achieve my goal pls?
-S
