How To Block IP Addresses In HAProxy

#devops #haproxy #aws #alc

Update haproxy.cfg to add condition acl is-blocked-ip src -f /etc/haproxy/blocklisted.ips



frontend fe-lehaproxy
        bind *:80

        acl is-blocked-ip src -f /etc/haproxy/blocklisted.ips
        http-request deny if is-blocked-ip

        acl letsencrypt-acl path_beg /.well-known/acme-challenge/
        use_backend letsencrypt-backend if letsencrypt-acl
        redirect scheme https code 301 if !letsencrypt-acl

frontend fe-verify
        bind *:443 ssl crt /etc/certs

        acl is-blocked-ip src -f /etc/haproxy/blocklisted.ips
        http-request deny if is-blocked-ip

        http-request set-header X-Forwarded-Proto https if { ssl_fc }
        default_backend mybackend

Blocked list



~:/etc/haproxy# cat blocklisted.ips 
32.66.111.255
11.129.81.18

Requests from IP addresses within the blocklisted.ips file will receive 403

Another way to block IP addresses is to update inbound rule of AWS ALC

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