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

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_
Nimbostratus
Apr 27, 2022
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
  Altostratus
  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 }
  }
  }
David_S_
Nimbostratus
Apr 27, 2022
That iRule might need AFM license.
David_Gill
Cirrus
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.
- AbdullahAlshehri
  Altostratus
  Apr 29, 2022
  Hello David_Gill,
  I tested the iRule which I mentioned early and it worked fine.
  Is there any difference with the one which you mentioned?
  - David_Gill
    Cirrus
    Apr 29, 2022
    Functionally they do the same thing however ACL::action drop requires AFM whereas drop on its own does not which means the snippet works for a larger audience. Switch is generally used when making more than one comparison (as shown at https://clouddocs.f5.com/api/irules/ACL__action.html) which is why I used a single if statement. There is no need to define any variables either. That said, in both cases the end result is the same.