Re: [Proftpd-user] Exceptional slowness and lost connections 1.3.6b vs 1.3.5e

On 03.12.19 15:43, Tony Stocker wrote:
>We've been using 1.3.5e for a long time without issue. However when we
>attempted to shift to 1.3.6b many of our users are suddenly unable to
>complete their authentications and timing out

this could be issue of mod_delay, try using "DelayEngine off"
>, and those that can get
>that far encounter exceptionally long lags on doing simple 'dir/ls'
>commands, on the order of 2-4 minutes to get returns. These problems
>cease as soon as we fail back to 1.3.5e, so it is not something with
>our network or firewalls.

Passive mode or port mode? Can be an ipv6 issue.

>The system in question is running CentOS 6.10 (Final) with the latest
>kernel, 2.6.32-754.24.3.el6.x86_64.

quite old system. can be something with this system as long.

>My first question is, is this a known issue? I can't find anybody else
>reporting anything similar in the forums. Secondly, can anyone think
>of something to try in terms of debugging that might help identify
>where the problem is? Since 1.3.5e is almost 3 years old at this
>point, our security folks are on us to upgrade, but the latest
>versions are basically unusable for our user community until this
>issue is solved. Please let me know what I can do to help solve this
>issue.

can you try debugging? run proftpd interactively "proftpd -nd10"
and see the results..

http://www.proftpd.org/docs/howto/Debugging.html
-- 
Matus UHLAR - fantomas, [email protected] ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
"They say when you play that M$ CD backward you can hear satanic messages."
"That's nothing. If you play it forward it will install Windows."


_______________________________________________
ProFTPD Users List   <[email protected]>
Unsubscribe problems?
http://www.proftpd.org/list-unsub.html