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AbdullahAlshehri's avatar
AbdullahAlshehri
Icon for Altostratus rankAltostratus
Apr 26, 2022

F5 iRule Geolocation restriction

Hello, I want to know how I can restrict the access to specific one country only via iRule. For example: allow only users to access from "US" and block all other countries.
application delivery
security
  • David_Gill's avatar
    David_Gill
    Apr 28, 2022
    when FLOW_INIT {

    #
    # Drop everything except US
    #
    if { ! ([whereis [IP::client_addr] country] equals "US") } {
        log -noname local0. "Dropping connection from [IP::client_addr]/[whereis [IP::client_addr] state country continent ]"
        drop
    } 
}

    AFM not required.

David_S_'s avatar
David_S_
Icon for Nimbostratus rankNimbostratus

I would make sure the LTM is updated with the latest GeoLocationUpdates from F5. Otherwise you will likely block valid US addresses.

Here is one very simple way to do this:

#
# Block_non_US_IP
#
# iRule to drop traffic that is not from US addresses
#
when CLIENT_ACCEPTED {
if { not [whereis [IP::client_addr] continent country] == "NA US" } {
log local0. "Connection from [IP::client_addr] [whereis [IP::client_addr] continent country] to [virtual name] [IP::local_addr] : Blocked."
drop
}
}

AbdullahAlshehri's avatar
AbdullahAlshehri
Icon for Altostratus rankAltostratus
Apr 27, 2022

Hello David,

Thank you for your reply. 

Just to clarify more, I'am using F5 DNS/LTM and I will apply the iRule on the VS.

Also, I prefer to block the traffic when TCP-SYN or UDP packet come from non-US country. I got iRule from clouddocs.f5 that may will work

when FLOW_INIT {

set ipaddr [IP::client_addr]

set locale [whereis $ipaddr country]

log local0. "IP Address/Counry $ipaddr/$locale"

switch $locale {

"US" { return }

default { ACL::action drop }

}

}