Hi all!
I have registered my cloud address on my hosting by creating a record for easy remembering and accessing my router.
Suddenly the link stopped working. After making some digging, I discovered that on my hosting and on my router there are totally different addresses, which tells me that it had changed on the router side at some point.
Is this a normal behavior? What happened?
Thanks
Do you use static WAN IP for your router assigned?
No the internet provider supplies a dynamic ip.
That is why i use the cloud link which was working fine for a couple of years and suddenly got altered.
Once again i am not talking about an ip address that changed.
But cloud link
So you created a CNAME-record on your own domain referring to the standardised XXXXX.sn.mynetname.net
Or what “record” did you create?
Do mean that if you lookup XXXX.sn.mynetname.net that the IP is not the same as what is actually on your WAN-interface?
Maybe in your LAN you have another mikrotik router that also requested a DNS name from mikrotik cloud?
The link can’t change. It is identical to the serial number of the router.
Exactly! I created CNAME-record on my domain and entered that XXXX.sn.mynetname.net address. and everything was working perfectly fine.
and and then stopped. So, I went into CNAME records and compared the the address there and the one in the router itself - they were different.
Strange. Is that cloud link is specific of each device right? so If i say change this router for the same, the address will be different and the old one would not allow to access that router, correct? 
Anyway, really strange
THANKS. and no, I only have one active unit (and one in the box as back up) and it is a main router.
Yes, each device has a unique serial-number so distinct FQDN “XXXX.sn.mynetname.net”
I use the same “method” and this works rock-solid for years over here, never had such hiccups.
Perhaps your WAN-IP did change and the “update” process glitched hence giving a difference ??
Honestly, I do not know. IP periodically changes since it is a fynamic ip. but the fact that the cloud link changed on its own is weird.
So far, I cannot find any logic in this, I am not a network specialist but this is a device/brand specific issue. For a couple of years it was working great! Now that I changed that link on CNAME everything is working perfectly well again
Let me ask you a question a bit off topic. When you have a dynamic ip with a provider, what makes that IP change? Is it certain number of days or hours?
is it possible to somehow lock that ip I know, idiotic question… Provider is like a my router’s dhcp server… constantly changes ip"s
What exactly are you referring to when saying “the cloud link”? Knowing exact definition would help to think of reasons for it to change.
As to changing public WAN IP address … there are multiple reasons and some depend on ISP’s network layout. E.g. if ISP uses CGNAT, then your actual public IP address changes (almost) on the fly as ISP’s main NAT device allocates public IP address and port for each connection establishing. If, OTOH, your CPE (that can be your MT router) is actually receiving actual (globaly routable) public IP address, then it depends on how CPE gets that address. Most often it’ll get it via DHCP and DHCP lease comes with validity period. Theoretically leased address might change each time lease gets renewed, but most often it doesn’t unless ISP wants it differently. Even if ISP doesn’t change IPs on purpose, leased IP can change ocasionally due to plethora of technical reasons.
Thanks for your answer. By cloud link I mean XXXX.sn.mynetname.net that is given by the router
What device are we talking about?
rb3011
Did the serial number change too?
Maybe someone swapped your device.
SN conforms with the numbers in the cloud address. (at least now)
And is the same SN written on the device?
I would like to hope so. It is in the rack and I really would not want to unscrew it as something may go irrespective of my intentions