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How to configure FTP inspection on a non standard port in addition to port 21.

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Issue:-


Configuring FTP to be inspected on non standard port in addition to port 21.


Resolution:-


To configure FTP inspection on non standard port, following configuration is required.

NOTE:- In this example we have used port 2100 for FTP inspection.


  • Create a new Class-map and match tcp port 2100 in it.


Class FTP2100
Match port tcp eq 2100


  • Now go into global_policy and call the class-map that was created before, set action to "inspect FTP" on it.

policy-map global_policy
class FTP2100
    inspect ftp

Assuming that Service-policy is already applied globally, once configure FTP inspection will start on port 2100 along with port 21.