Recognize AnyCast Address in Geo-IP Blocking

An AnyCast IP can be advertised from multiple locations and the router selects a path based on latency, distance, cost, number of hops, etc. This technique is widely used by providers to route users to the closest server. Since the IP is hosted in multiple geographic locations, there is no way to specify one single location to that IP.

This version introduces an option to bypass AnyCast IP ranges in Geo-IP blocking. ISDB contains a list of confirmed AnyCast IP ranges that can be used for this purpose.

When source/destination is set to geoip, you can enable the geoip-anycast option. When enabled, IPs where the AnyCast option is set to 1 in geoip_db are bypassed in country matching and blocking.

You can only use CLI to configure this feature. See the following example.

To enable geoip-anycast setting in a policy:

config firewall policy

edit 1

set name "policyid-1"

set uuid dfcaec9c-e925-51e8-cf3e-fed9a1d42a1c

set srcintf "wan2"

set dstintf "wan1"

set srcaddr "all"

set dstaddr "test-geoip-CA_1"

set action accept

set schedule "always"

set service "ALL"

set geoip-anycast enable

set logtraffic all

set nat enable

next

end

To check the geoip-anycast option for an IP address:

diag geoip ip2country 1.0.0.1

1.0.0.1 - Australia, is anycast ip

1.0.0.1 is the AnyCast IP.