Re: [RESEND][RFC PATCH 0/6] Fork brute force attack mitigation (fbfam)

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Hi,

On Sat, Sep 12, 2020 at 10:48:39PM +0200, Ondrej Mosnacek wrote:
> On Sat, Sep 12, 2020 at 4:51 PM Mel Gorman <mgorman@xxxxxxx> wrote:
> > On Sat, Sep 12, 2020 at 11:36:52AM +0200, John Wood wrote:
> > > On Sat, Sep 12, 2020 at 12:56:18AM -0700, Kees Cook wrote:
> > > > On Sat, Sep 12, 2020 at 10:03:23AM +1000, James Morris wrote:
> > > > > On Thu, 10 Sep 2020, Kees Cook wrote:
> > > > >
> > > > > > [kees: re-sending this series on behalf of John Wood <john.wood@xxxxxxx>
> > > > > >  also visible at https://github.com/johwood/linux fbfam]
> > > > > >
> > > > > > From: John Wood <john.wood@xxxxxxx>
> > > > >
> > > > > Why are you resending this? The author of the code needs to be able to
> > > > > send and receive emails directly as part of development and maintenance.
> > >
> > > I tried to send the full patch serie by myself but my email got blocked. After
> > > get support from my email provider it told to me that my account is young,
> > > and due to its spam policie I am not allow, for now, to send a big amount
> > > of mails in a short period. They also informed me that soon I will be able
> > > to send more mails. The quantity increase with the age of the account.
> > >
> >
> > If you're using "git send-email" then specify --confirm=always and
> > either manually send a mail every few seconds or use an expect script
> > like
> >
> > #!/bin/bash
> > EXPECT_SCRIPT=
> > function cleanup() {
> >         if [ "$EXPECT_SCRIPT" != "" ]; then
> >                 rm $EXPECT_SCRIPT
> >         fi
> > }
> > trap cleanup EXIT
> >
> > EXPECT_SCRIPT=`mktemp`
> > cat > $EXPECT_SCRIPT <<EOF
> > spawn sh ./SEND
> > expect {
> >         "Send this email"   { sleep 10; exp_send y\\r; exp_continue }
> > }
> > EOF
> >
> > expect -f $EXPECT_SCRIPT
> > exit $?
> >
> > This will work if your provider limits the rate mails are sent rather
> > than the total amount.

Yes, it seems to be what is happening.

> ...or you could keep it simple and just pass "--batch-size 1
> --relogin-delay 10" to git send-email ;)

Mel and Ondrej thanks a lot for the proposed solutions. I'm sure some of
your solutions will be used soon.

> --
> Ondrej Mosnacek
> Software Engineer, Platform Security - SELinux kernel
> Red Hat, Inc.

Regards,
John Wood





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