iptables v1.3.4: "--dport unknown argument"

I have tried different ways of using iptables - from iptables manuals,
books etc.

For example:
# iptables -A INPUT -i eth0 -p udp --dport 41031 -j DROP

But I always have "--dport unknown argument".

What do I miss?

Thank you,

Dimitry

Dimitry wrote:
> I have tried different ways of using iptables - from iptables manuals,
> books etc.
>
> For example:
> # iptables -A INPUT -i eth0 -p udp --dport 41031 -j DROP
>
> But I always have "--dport unknown argument".
>
> What do I miss?

For reasons nobody seems to know, the '--port' abbreviation is only
valid for TCP. For UDP, you must use the full option name,
'--destination-port'.

DS

Dimitry wrote:
> # iptables -A INPUT -i eth0 -p udp --dport 41031 -j DROP
> But I always have "--dport unknown argument".

David Schwartz <(E-Mail Removed)> wrote:
> For reasons nobody seems to know, the '--port' abbreviation is only
> valid for TCP. For UDP, you must use the full option name,
> '--destination-port'.

If it's any consolation, it works here as expected, using version 1.3.6.
Chris