It's even more trivial if you do this:
echo "51024 54999" > /proc/sys/net/ipv4/ip_local_port_range
-d
Bastiaan Bakker wrote:
> Hi,
>
> As has been dicussed on this list in April, Linux does not follow the
> IANA recommendation to use port number 49152 and higher for dynamic
> ports. Albert D. Cahalan suggested changing the current range of 1024
> till 4999 into 51024 till 514999. David Miller said 'Ok, this needs to
> be fixed then.' but Andi Kleen objected that the change would cause
> problems with poorly configured packes filters.
> Since then, it has been quiet about the topic, and the kernel has not
> been changed.
> I would like to argue in favour of changing the range: first, it's the
> 'right' thing to do. Secondly, the old range generates problems with
> applications that expect to be able to bind to 'their' port. In
> particular, I've experienced failures with HylaFAX, because the faxmail
> delivery agent uses port 4558, which at random times already was
> occupied.
> Thirdly, it's trivial to get back the old range with sysctl if you need
> compatibilty with broken packet filters.
> There is still time to do this IANA compliancy change now, once 2.4.0 is
> out we have to wait until at least 2.6, which may be a rather long
> time.
>
> Regards,
>
> Bastiaan Bakker
> LifeLine Networks BV
>
> PS. could you please CC replies to me, as I'm not subscribed to the
> list.
>
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