Automatic script for Mikrotik RouterOS updating record on CloudFlare.

cloudflare_update.script

#########################################################################
#         ==================================================            #
#         $ Mikrotik RouterOS update script for CloudFlare $            #
#         ==================================================            #
#                                                                       #
# - You need a CloudFlare account & api key (look under settings),      #
#   a zone and A record in it                                           #
# - All variables in first section are obvious, except CFid,            #
#   To obtain CFid use following command in any unix shell:             #
#    curl https://www.cloudflare.com/api_json.html -d 'a=rec_load_all' -d 'tkn=YOUR_API_KEY' -d 'email=email@example.com' -d 'z=domain.com'|python -mjson.tool 
# - Enable CFDebug if needed - it'll print some info to logs            #
# - Put script under /system scripts giving "read" policy access.       #
#   For 6.29 and older "test" policy is also needed.                    #
# - Add script to /system scheduler using it's name in "on-event"       #
#                                                                       #
#              Credits for Samuel Tegenfeldt, CC BY-SA 3.0              #
#                        Modified by kiler129                           #
#########################################################################

################# CloudFlare variables #################
:local CFDebug "true"
:global WANInterface "ether1-gateway"  

:local CFdomain "sub.domain.com"
:local CFzone "domain.com"

:local CFemail "email@example.com"
:local CFtkn "YOUR_API_KEY"

:local CFid "353275870"
:local CFrecordType "A"
:local CFserviceMode "0"
:local CFttl "120"
#########################################################################
########################  DO NOT EDIT BELOW  ############################
#########################################################################



################# Internal variables #################
:local resolvedIP ""
:global WANip ""
 
################# Resolve and set IP-variables #################
:local currentIP [/ip address get [/ip address find interface=$WANInterface ] address];
:set WANip [:pick $currentIP 0 [:find $currentIP "/"]];
:set resolvedIP [:resolve $CFdomain];
 
################# Build CF API Url #################
:local CFurl "https://www.cloudflare.com/api_json.html\3F"
:set CFurl ($CFurl . "email=$CFemail&tkn=$CFtkn&a=rec_edit");
:set CFurl ($CFurl . "&id=$CFid&z=$CFzone&name=$CFdomain");
:set CFurl ($CFurl . "&type=$CFrecordType&service_mode=$CFserviceMode&ttl=$CFttl");

######## Write debug info to log #################
:if ($CFDebug = "true") do={
 :log info ("CF: hostname = $CFdomain")
 :log info ("CF: resolvedIP = $resolvedIP")
 :log info ("CF: currentIP = $currentIP")
 :log info ("CF: WANip = $WANip")
 :log info ("CF: CFurl = $CFurl&content=$WANip")
};
 
######## Compare and update CF if necessary #####
:if ($resolvedIP != $WANip) do={
 :log info ("CF: Updating CF, setting $CFDomain = $WANip")
 /tool fetch mode=https url="$CFurl&content=$WANip" keep-result=no
 /ip dns cache flush
} else={
 :log info "CF: No Update Needed!"
}

I would also use that solution. @dynek @kiler129

Anyone done it yet ? ;)

Anyone done it yet ? ;)

I managed to make it work and place it in Fork

unable to get CFid

curl -X GET "https://api.cloudflare.com/client/v4/zones/[Zone ID]/dns_records"
-H "X-Auth-Email: [Email]"
-H "X-Auth-Key: [API Key]"
-H "Content-Type: application/json"

To be fair I never updated that script (and @viritt's fork mentioned above should work) because since introduction of MikroTik IP Cloud there's no point in doing so.

You can just set-up a CNAME on CF like so:

If it bothers you that there's an extra DNS query (I cannot think about any realistic scenario here) you can even enable CNAME Flattening and it will look like a standard A record.