I can't recall any other meaning for passive except in FTP transfers or maybe the old days of Arcnet. The link is the only example of passive that I have know. That explains exactly what we are trying to accomplish. Sorry for the confusion if any.
We have a client that requires using passive mode to transfer files. With the 678 in place, we can not run in passive mode. We have ports 1024-6000 open on the 678 in order to run passive. The 678 is not running NAT, we have a public IP on the server. We also would like to be able to run passive on a port other than 20/21. Is that possible?
Regarding passive mode with FTP -- IOS shouldn't prevent this since the router is just passing the traffic through the router, unless you have ACLs, or something set up to alter / filter the traffic. Posting the configs might help us help you. Also, a network diagram so we have a idea of where the server and client(s) are.
Regarding the port numbers, that would on the server / client. Again, the traffic is passing through the router.
As for the previous discussions, passive can mean many things. Examples: Passive interfaces for routing protocols, passive mode for DLSW, and such.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...