Apache DoS - is Varnish affected?

Poul-Henning Kamp phk at phk.freebsd.dk
Fri Jun 19 19:08:30 CEST 2009

In message <4A3BB2E1.8090300 at loman.net>, Nick Loman writes:
>Poul-Henning Kamp wrote:

>> Varnish will abandon the connection after a fixed number of header
>> lines.
>That's reassuring. Out of interest, what is the limit?

32 - 3 (for the first line fields)

>Presumably that limit * the read timeout is the length of time a 
>connection could be held open by a rogue client? 

Something like that, I have not tried it.

Worst case it would be a timeout for each character.

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

More information about the varnish-misc mailing list