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+--- Forum: Usage (/forum-34.html)
+--- Thread: proftpd slow authentication (/thread-10823.html)
proftpd slow authentication - sidha - 05-30-2010 03:59 PM
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?
RE: proftpd slow authentication - joximu - 05-31-2010 07:09 AM
try to start proftpd with debugging output (see other posts about proftpd problems) then you might see where the problem is...
/J
RE: proftpd slow authentication - sidha - 06-02-2010 06:30 PM
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.
RE: proftpd slow authentication - joximu - 06-03-2010 07:35 AM
ah.
the include loads rules so that the customers cannot delete some important folders in their home (htdocs, backups etc)...
/J
RE: proftpd slow authentication - sidha - 06-04-2010 08:35 PM
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 :-)
RE: proftpd slow authentication - BeNe - 06-04-2010 10:01 PM
We know that behavior, but there is no better workaround these days.
Greez BeNe
RE: proftpd slow authentication - SniperSister - 07-03-2010 01:04 AM
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
RE: proftpd slow authentication - Minganus - 02-09-2011 04:38 AM
Here some additional solutions
http://isp-control.net/forum/thread-9064-post-94835.html