We use the Telstra.Extranet APN extensively, and have DynDNS set up to let us keep track of the current IP I can't remember the original source to attribute properly, but here is a DynDNS script that I found and lightly modified a few years ago: # Set needed variables :local username "your DynDNS username" :local password "your DynDNS password" :local hostname "your DynDNS hostname for this device" :global dyndnsForce :global previousIP # print some debug info :log info ("UpdateDynDNS: username = $username") :log info ("UpdateDynDNS: hostname = $hostname") :log info ("UpdateDynDNS: previousIP = $previousIP") # get the current IP address from the internet (in case of double-nat) /tool fetch mode=http address="checkip.dyndns.org" src-path="/" dst-path="/dyndns.checkip.html" :delay 1 :local result [/file get dyndns.checkip.html contents] # parse the current IP result :local resultLen [:len $result] :local startLoc [:find $result ": " -1] :set startLoc ($startLoc + 2) :local endLoc [:find $result "</body>" -1] :local currentIP [:pick $result $startLoc $endLoc] :log info "UpdateDynDNS: currentIP = $currentIP" # Remove the # on next line to force an update every single time - useful for debugging, # but you could end up getting blacklisted by DynDNS! :set dyndnsForce false # Determine if dyndns update is needed # more dyndns updater request details http://www.dyndns.com/developers/specs/syntax.html :if (($currentIP != $previousIP) || ($dyndnsForce = true)) do={ :set dyndnsForce false :set previousIP $currentIP :log info "$currentIP or $previousIP" /tool fetch user=$username password=$password mode=http address="members.dyndns.org" \ src-path="nic/update?system=dyndns&hostname=$hostname&myip=$currentIP&wildca rd=no" \ dst-path="/dyndns.txt" :delay 1 :local result [/file get dyndns.txt contents] :log info ("UpdateDynDNS: Dyndns update needed") :log info ("UpdateDynDNS: Dyndns Update Result: ".$result) :put ("Dyndns Update Result: ".$result) } else={ :log info ("UpdateDynDNS: No dyndns update needed") } -----Original Message----- From: Public [mailto:public-bounces@talk.mikrotik.com.au] On Behalf Of RJ Plummer Sent: Wednesday, 13 May 2015 2:34 PM To: MikroTik Australia Public List Subject: Re: [MT-AU Public] 3G/4G with static public IP Telstra doesn't offer these without a lot of strings attached. To get a static via Telstra you need to have a IP WAN with a mobile gateway service and then a certain # of mobile data services, which you can then assign ip's to etc etc. so it's just not really an option without the other infrastructure. You can get a dynamic public IP via their "Telstra.extranet" apn which you can call and ask for but not a static. You'll either need to make do with Telstra and a dynamic ip or use an alternate provider like hutchison or a reseller (I think there was one called beagle telecom that did fairly decent plans with static ip's) -----Original Message----- From: Public [mailto:public-bounces@talk.mikrotik.com.au] On Behalf Of Paul Julian Sent: Wednesday, 13 May 2015 12:29 PM To: public@talk.mikrotik.com.au Subject: [MT-AU Public] 3G/4G with static public IP Hi guys, is anybody currently using a 3G/4G mobile sim in a router/device that has a static public IP ? I can't find anybody in Telstra who actually realises that they sell such a plan so can't get any traction on it even though I know that people definitely have them and use them. Can anybody tell me how to order such a service ? Thanks Paul