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Change FTP port in for DSL in Cisco 675

I have an FTP server running on my system and I have had a large number of attempted hacks. I would like to change the port number for the FTP server and can do that in the software. However, it appears as though the DSL modem is still using port 21 for the DATA connections.

Any ideas on how I change this?

I am using CBOS 2.4.3.


Re: Change FTP port in for DSL in Cisco 675

Since there has been no response to your post, it appears to be either too complex or too rare an issue for other forum members to assist you. If you don't get a suitable response to your post, you may wish to review our resources at the online Technical Assistance Center ( or speak with a TAC engineer. You can open a TAC case online at

If anyone else in the forum has some advice, please reply to this thread.

Thank you for posting.

Re: Change FTP port in for DSL in Cisco 675

You might want to try configuring the FTP client(s) in passive mode after changing the server port #.