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On Thu, Sep 29, 2011 at 11:47:10AM +0300, Julian Anastasov wrote:
>
> Hello,
>
> On Thu, 29 Sep 2011, Simon Horman wrote:
>
> > * Also reword the test to make it read more easily (to me)
> >
> > Signed-off-by: Simon Horman <horms@xxxxxxxxxxxx>
> >
> > ---
> >
> > Julian, I don't see that IPVS currently implements alternate
> > timeouts for secure_tcp. Am I missing something?
>
> Yes, only states are changed. What is missing is a
> libipvs support to modify per-protocol timeouts because they
> are not exported to /proc anymore. As the states have name,
> may be we can implement timeout to be set as follows:
>
> ipvsadm --set-state-timeout -p TCP SYN 10
>
> Using 2 timeout tables just for secure_tcp is
> complicated and with the above control it is not needed.
Yes, I agree there is room for improvement.
I guess the best way forward is to use netlink
to allow per-state per-protocol timeout adjustment.
In the mean time, I'll queue this patch up as I think
its good that the documentation reflects the implementation.
>
> > ---
> > Documentation/networking/ipvs-sysctl.txt | 10 ++++------
> > 1 files changed, 4 insertions(+), 6 deletions(-)
> >
> > diff --git a/Documentation/networking/ipvs-sysctl.txt
> > b/Documentation/networking/ipvs-sysctl.txt
> > index 1dcdd49..13610e3 100644
> > --- a/Documentation/networking/ipvs-sysctl.txt
> > +++ b/Documentation/networking/ipvs-sysctl.txt
> > @@ -140,13 +140,11 @@ nat_icmp_send - BOOLEAN
> > secure_tcp - INTEGER
> > 0 - disabled (default)
> >
> > - The secure_tcp defense is to use a more complicated state
> > - transition table and some possible short timeouts of each
> > - state. In the VS/NAT, it delays the entering the ESTABLISHED
> > - until the real server starts to send data and ACK packet
> > - (after 3-way handshake).
> > + The secure_tcp defense is to use a more complicated TCP state
> > + transition table. For VS/NAT, it also delays entering the
> > + TCP ESTABLISHED state until the three way handshake is completed.
> >
> > - The value definition is the same as that of drop_entry or
> > + The value definition is the same as that of drop_entry and
> > drop_packet.
> >
> > sync_threshold - INTEGER
> > --
> > 1.7.5.4
>
> Regards
>
> --
> Julian Anastasov <ja@xxxxxx>
>
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