proftpd slow authentication

[sidha]

System: Debian Lenny with current proftpd (1.3.1-17lenny4).
Problem: FTP connection is ok. Connection (probably the authentication) causes 100% cpu load for about 10-30 seconds if the server is idle. If the server is busy, then the process failed with 100%cpu for several minutes.
If the server is idle, the connection estabilished in about 10-30 seconds (!) but everything else is fine. What causes this high, constant cpu load at ftp authentication/connection?

[joximu]

try to start proftpd with debugging output (see other posts about proftpd problems) then you might see where the problem is...

/J

[sidha]

Thank you for reply, but this not solved anything. If i start proftpd with debugging options, the only thing i can see is: the mod_auth take about 80-90% of the connection time (20-30secs).
Anyway, i'm just solved this problem myself. The solution was: removing the last line from /etc/proftpd/proftpd.conf file (Include /etc/proftpd/ispcp/*)
I'm not sure this modification can cause any problem or not, but my ftp accounts are working fine (and working fast) which i'm testing.
SOLVED.

[joximu]

ah.

the include loads rules so that the customers cannot delete some important folders in their home (htdocs, backups etc)...

/J

[sidha]

I see... but then this simple rules causes 100%cpu load for about half minute via the profptd mod_auth module during ftp logins. Why?

---------------
Summary:
With this rules loaded: every ftp login take 20-30secs and proftpd mod_auth take constant 100% cpu usage
Without rules: every ftp login take cca. 1-2 secs, and about 0% cpu: proftpd sometimes even not appear on top, or with max. 1-2% cpu. Nice :-)

[BeNe]

We know that behavior, but there is no better workaround these days.

Greez BeNe

[SniperSister]

Hey guys,

any news regarding this topic? I just had the same issue on a client server and proftp was knocked out for more than 3 minutes, so the login timed out.

Best regards
David

[Minganus]

Here some additional solutions
http://isp-control.net/forum/thread-9064...94835.html