Burnham Beech said:
Use DCC to connect to the DM500. Go to the FTP tab, open foder var/etc. Right click cccаm.cfg - edit - put a # in front of F line, save and exit.
That's really bad advice. { Sorry bud but it is }
If you just # out the F line your peer will still be trying to connect to you.
You have two options.
1. Speak to your peer and ask him/her to remove the C line { This is the best option }
2. Change your F line to this F: user pass 0 0 0 { 0:0:0 } { } { } his/her.dns.org
Option 2 means they stay connected but get nothing from you, this stops all traffic and will prevent and illegal user causing you stability problems.