Hammering Pause Error 530

[FTP Novice]

everytime anyone tries to login in to my server they get past the validating user and P/W and then a hammering pause occurs still in green. After that an error 530 occurs in red. I've been operating my server for several months and I have never seen this before. Any suggestions?

[boco]

If they get a 530 error, it's an unsuccessful login. After a few unsuccessful logins in sequence, they will get slowed down. Would you please post a server log?

[FTP Novice]

Status: Connecting to 65.11.243.143:21...
Status: Connection established, waiting for welcome message...
Response: 220 Fastream IQ FTP Server
Command: USER ADMIN
Response: 331 Password required for ADMIN.
Command: PASS ***********
Response: 530-Anti-hammering pause...
Response: 530 Login incorrect.
Error: Critical error
Error: Could not connect to server

I have tried not using a password. Still the same error. I've tried creating an entire new user, pw. Still the same error. I have to be missing something here.

[botg]

That server isn't FileZilla Server. Are you sure you posted in the correct subforum?

[FTP Novice]

The log posted is a log from a FZ client trying to get into my FileZilla server. The server log doesnt show any activity.

[boco]

Response: 220 Fastream IQ FTP Server

This is with absolute certainty NOT FileZilla Server you're connecting to. Seems you have a rogue server installed.