openssh and linux ipv6

Pekka Savola pekkas at
Thu Mar 15 05:59:15 EST 2001

On Wed, 14 Mar 2001, José M. Fandiño wrote:

> Pekka Savola wrote:
> > I haven't had problems with kernel freezes, linux and openssh.  Using 2.4
> As I said it succeeds with a kernel in the 2.2.x series.
> (I'm using a standard 2.2.18 kernel without pachtes, I
> post my kernel configuration)

I can't reproduce a crash on RHL62 + 2.2.17-14 + telnet to ::1 and.
OpenSSH 2.5.1p2.  2.3.0p1 also tested fine.  I didn't use '--without-4in6'
though, but that shouldn't be significant.

Would this work if you downgraded the kernel a bit (e.g. 2.2.16/17), or
tried the latest -acXX patch?

> I suppose that kernels 2.4.x have a major code rewriting
> and different behavior.

Unfortunately, no.  Linux IPv6 code has been in a rather static state for
the last 3 years or so.  USAGI kernels ( have actually
developed a bit.

> > kernel, 2.5.1p2, RHL7.  Does 'stracing' sshd telnet/sshd process give
> > hints where this might halt?
> nope, at the time that simply the client side contact with the server side
> the linux server stop of respond. It's totally dead.

Still, IMO this looks more like a very specific problem -- I'm rather sure
2.2.x kernels are fine overall.

Where does the strace stop?

Pekka Savola                  "Tell me of difficulties surmounted,
Netcore Oy                    not those you stumble over and fall"
Systems. Networks. Security.   -- Robert Jordan: A Crown of Swords

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