I have been having this happen a few times per week for the past few
weeks. I believe it is caused by someone attacking proftpd. I noticed
today that there is an updated version - 1.3.3c that fixes a
vulnerability that they may have been trying to exploit.
When I looked at the process list, I would see around 20 proftpd's, each
with a high amount of CPU used, and connected to a specific IP. I'd
firewall off those IPs and kill off proftpd/restart. Knock on wood, I
have not had that happen since upgrading to 1.3.3c, but that may just be
because no one has tried again yet.
Jerry
On 12/10/2010 4:39 PM, Ryan Coleman wrote:
Does anyone have any ideas?
On Dec 9, 2010, at 3:12 PM, Ryan Coleman wrote:
Dear list,
Has anyone else had experience with ProFTP 1.3.3a running away with processes?
I installed it about 2 months ago with a new server build and over the course
of the last three weeks I've had to forcibly kill, wait and restart the service
every one-to-three days and sucking up between 20% and 80% of my system
resources.
I've attempted to change the logging in hopes to track down what is causing the
problems but I have not been successful. Additionally it won't connect after a
restart through Filezilla but using Terminal on my MBP it will connect in the
CLI.
It's not the end of the world (for me) but it is for my staff when they have to
upload large numbers of photos.
Thanks,
Ryan
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