https://community.cisco.com/t5/network-security/how-to-open-dynamically-tcp-ports-in-the-cisco-firewall/m-p/3027864#M145449 <P>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.</P> <P>Not a very elegant solution but so is an app that needs dynamic high ports on the server side in 2017.</P> Wed, 29 Mar 2017 21:16:20 GMT Oliver Kaiser 2017-03-29T21:16:20Z https://community.cisco.com/t5/network-security/how-to-open-dynamically-tcp-ports-in-the-cisco-firewall/m-p/3027863#M145446 <P>Hi</P> <P>I am running&nbsp;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.</P> <P></P> <P></P> <P>Bedst regards&nbsp;</P> <P>Sfanayei</P> Tue, 12 Mar 2019 09:07:55 GMT https://community.cisco.com/t5/network-security/how-to-open-dynamically-tcp-ports-in-the-cisco-firewall/m-p/3027863#M145446 sfanayei 2019-03-12T09:07:55Z https://community.cisco.com/t5/network-security/how-to-open-dynamically-tcp-ports-in-the-cisco-firewall/m-p/3027864#M145449 <P>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.</P> <P>Not a very elegant solution but so is an app that needs dynamic high ports on the server side in 2017.</P> Wed, 29 Mar 2017 21:16:20 GMT https://community.cisco.com/t5/network-security/how-to-open-dynamically-tcp-ports-in-the-cisco-firewall/m-p/3027864#M145449 Oliver Kaiser 2017-03-29T21:16:20Z