Hi,
I am new on Mikrotik devices… I want to know is possible to resolve ip address on firewall connections, to view the URL or the DNS name..
Not directly, you’d need a script to provide DNS names of the IP addresses; however, several DNS names may resolve to the same IP address, and for other IP addresses, no reverse DNS record exists. The complete urls are completely out of question, as only the DNS name can be mapped to the IP address (with the limitations above), and in case of https, you cannot see the complete url in plaintext even in the payload.
Perhaps I misunderstood the question, but
YES, you can use dnydns URLs in the router but the place to take advantage of that is in the firewall address lists.
One practical application is using your providers DYNDNS URL, or the free one provided by MT (see MT Cloud) in a firewall address configuration and then pointing to that in a destination nat rule.
Another application would be to limit incoming external wan connections (access to your server) to KNOWN external users. This list could consist of static IPs others use or if they have dynamic IPs, their associated dyndns provider URL name, which would be resolved.
To keep your own personal dyndns provider up to date on your own dynamic WANIP, one needs to put a script on the router to keep that updated.
oops I did misread the question, sounds like you want the reverse, my bad.