Hello,
we recently had some situation of full bandwidth usage through our firewall,
and by investigation we discovered that this was caused by a specific mail to a
specific destination sent via Postifx 3.1.6.
We found an ACK SYN DUP flood during the problem, many many packets sent, and
this on
Gabriele Bulfon:
> Hello,
> we recently had some situation of full bandwidth usage through our
> firewall, and by investigation we discovered that this was caused
> by a specific mail to a specific destination sent via Postifx 3.1.6.
> We found an ACK SYN DUP flood during the problem, many many pac
Thanks so much for the deep explanation :)
Kernel is illumos, I exclude it can be a bug in the kernel stack.
I will check Postfix config, but I don't think there is any huge limit as you
suggested.
What about the "PIX workaround"? Can it be something causing this? It did not
happen on a previ
Gabriele Bulfon:
> Thanks so much for the deep explanation :)
Considering the questions asked, I must keep the conversation at a
basic level.
> Kernel is illumos, I exclude it can be a bug in the kernel stack.
> I will check Postfix config, but I don't think there is any huge
> limit as you sugge
