Geographic and IP Reputation Filtering

Geographic and IP Reputation Filtering

Geographic filtering and IP reputation checking add another layer of protection by blocking traffic from high-risk sources. While not appropriate for all web servers, these techniques prove valuable for region-specific services or when facing targeted attacks from specific geographic areas.

Implement geographic restrictions when your service targets specific regions:

Allow TCP from country_code in (US,CA,UK,AU) to web_server_ip port 443
Deny TCP from country_code in (XX,YY) to web_server_ip port 443

IP reputation filtering blocks known malicious sources:

Deny all from ip_reputation_list "malicious" to web_server_ip
Allow TCP from any to web_server_ip port 443

Dynamic blacklisting based on behavior patterns provides adaptive protection:

If connection_count from source_ip > 1000 in 60 seconds then
    Add source_ip to temporary_blocklist for 3600 seconds