Can i get all my traffic routed through clouflare so remote application always get one static IP since remote server have IP based allowlist
Cloudflare has several IP address ranges which are shared by all proxied hostnames. On the Enterprise plan you have the option to set Static IP addresses for your domain.
Business and Enterprise customers can reduce the number of Cloudflare IPs that their domain shares with other Cloudflare customer domains by uploading a Custom SSL certificate.
I hope this helps.