Hi Team, I am new to HAProxy ACL and following below blog to create a rule to have Application safe from DDOS.
http://blog.haproxy.com/2012/10/12/scalable-waf-protection-with-haproxy-and-apache-with-modsecurity/ === frontend ft_waf bind 192.168.10.2:80 name http mode http log global option httplog timeout client 25s maxconn 10000 stick-table type ip size 1m expire 1m store gpc0,http_req_rate(10s),http_err_rate(10s) tcp-request connection track-sc1 src tcp-request connection reject if { sc1_get_gpc0 gt 0 } # Abuser means more than 100reqs/10s acl abuse sc1_http_req_rate(*ft_web*) ge 100 acl flag_abuser sc1_inc_gpc0(*ft_web*) tcp-request content reject if abuse flag_abuser default_backend bk_waf #When I am using ft_web, I am getting [ALERT] 193/155117 (6404) : parsing [/etc/haproxy/haproxy.cfg:65] : unable to find table '*ft_web*' referenced in arg 1 of ACL keyword 'sc1_http_req_rate' in proxy '*ft_web*'. Once I changed it to ft_waf *(which I think should be because we need acl on Frontend which is serving public traffic)*, I am getting below Warning: Starting haproxy: [WARNING] 193/162102 (6657) : parsing acl keyword 'sc1_inc_gpc0(ft_waf)' : no pattern to match against were provided, so this ACL will never match. If this is what you intended, please add '--' to get rid of this warning. If you intended to match only for existence, please use '-m found'. If you wanted to force an int to match as a bool, please use '-m bool'. # WAF farm where users' traffic is routed first backend bk_waf balance roundrobin mode http log global option httplog option forwardfor header X-Client-IP option httpchk HEAD /waf_health_check HTTP/1.0 # If the source IP generated 10 or more http request over the defined period, # flag the IP as abuser on the frontend acl abuse sc1_http_err_rate(*ft_waf*) ge 10 acl flag_abuser sc1_inc_gpc0(*ft_waf*) tcp-request content reject if abuse flag_abuser # Specific WAF checking: a DENY means everything is OK http-check expect status 403 timeout server 25s default-server inter 3s rise 2 fall 3 server waf1 192.168.10.15:81 maxconn 100 weight 10 check server waf2 192.168.10.16:81 maxconn 100 weight 10 check frontend ft_web bind 192.168.10.2:81 name http mode http log global option httplog timeout client 25s maxconn 1000 # route health check requests to a specific backend to avoid graph pollution in ALOHA GUI use_backend bk_waf_health_check if { path /waf_health_check } default_backend bk_web ==== Please suggest as what is wrong here. *Best Regards,* *__________________________________________* *Yogesh Sharma*
