luben karavelov wrote:
> A DoS attack against number of http servers is available and has hit
> slashdot today:
> http://it.slashdot.org/story/09/06/19/1243203/Attack-On-a-Significant-Flaw-In-Apache-Released
>
>
> Out of the box nginx is also vulnerable (I have tested it on latest 0.7
> installation). A quick fix for the vulnerability follows:
>
> Put in "http" section:
>
> client_body_timeout 10;
> client_header_timeout 10;
> keepalive_timeout 10;
> send_timeout 10;
> limit_zone limit_per_ip $binary_remote_addr 1m;
>
> and put in "server" section :
>
> limit_conn limit_per 16;
>
> The last 2 configuration lines are for limiting connections per client
> IP. This fist lines are same sane connection timeouts.
>
> Best regards and keep the great work!
>

If you process some large uploads or the page generation gets over 10
seconds you could raise the timeouts. Actually the fix is the last
lines: limiting the connection number per client IP

Luben