why does my ftp server only login successully on every third try. If anyone can shed any light on it i'd be very grateful as it's driving me insane.
Not random, only every third try. I want it to work every try.
does it with vsftpd and proftpd.
does it whether xinetd or standalone.
Nothing to do with router, wouldn't work at all otherwise.
Not exhibited with sshd and httpd, they're both fine.
tried it using proftpd -nd6, restarting doesn't reset 'try count'.
checked it's listening using netstat -pant and it is listening on port 21.
Every 3rd try it sends this back to the client:
Code:
C:\Documents and Settings\bentaylor\My Documents\Personal>ftp xxx.xx.xx
Connected to xxx.xx.xx.
220 ProFTPD 1.3.0 Server (ProFTPD Default Installation) [192.168.1.3]
User (xxx.xx.xx:(none)): ben
but two in three times it does this:
Code:
C:\Documents and Settings\bentaylor\My Documents\Personal>ftp xxx.xx.xx
Connected to xxx.xx.xx.
220 FTP Server (Version 1.0) ready.
User (xxx.xx.xx:(none)):
on the two times that it doesn't work, the proftpd -nd6 doesn't print anything, so the packets clearly aren't getting to it. But they're coming through the router, so where are they ending up.
It's as if there's a "default" ftp server that's sending back the login prompt in the second of the above snippets that's getting in the way, but what? I havent' got any such thing installed, and proftpd should be listening on port 21, not anything else.
Like I say if you've got any vague clue no matter how ridiculous please please suggest it because I'm lost for any more avenues to try.