How to open dynamically tcp ports in the Cisco firewall.

[sfanayei]

Hi

I am running a customer-oriented client / server application. And I need to, when the client starts session by allowed ACL to the server with dst. tcp/1099 port than my firewall should open subsequently some high-end tcp ports dynamically in the same session. Is it possiable? Any help will be appreciated.

Bedst regards 

Sfanayei

[Oliver Kaiser · Accepted solution]

If its a well known protocol like FTP this works. But if this is just some custom app this wont work, You would have to allow all the high ports it could use.

Not a very elegant solution but so is an app that needs dynamic high ports on the server side in 2017.