I'm getting this warning in Tiger auditing reports
--WARN-- [lin003w] The process `proftpd' is listening on socket 21 (TCP on every interface) is run by proftpd.
The process is listening on port 21 OK
On every interface: I only have one OK
It's run by proftpd: that's the idea OK
I can't see the problem here...
Why do I get a warning about this?
It's a warning. On a security audit the software will try to warn you about all potential risks, even if it is a FTP that you know that is running. FTP is an insecure protocol and Tiger lists it. If you don't think it's a problem, then it's not :)