Hi All,
I have a FTP Front Side handler that is configured to listen on port 21. I am able to transfer files to this port using cURL, FileZilla etc.
After a point of time, the CPU Utilization of the device shoots up. The system logs continuously starts showing the below warnings
FTP Server: protocol violation on control connection from <CR> not followed by <LF> or <NUL>
The error report generated from the device shows the below
1,20091111T023605Z,DOMAIN1,ftp,warn,source-ftp-server,DataPower_FTPServerFSH_21,42385,207.193.193.207,0x80e000d3,,,
"FTP Server: protocol violation on control connection from 207.193.193.207, <CR> not followed by <LF> or <NUL>."
All services on the device become un-responsive once these warnings start appearing. The warnings go away after the device is restarted. After the restart, all services are fine. I am also able to transfer files using this service and after a couple of days we see these warnings again.
Another strange behavior is that these warnings do not go away even after we disable the MPG and the Front Side Handlers.
Has anyone seen something similar like this. Please share.
Thanks in Advance
