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udp port blocking

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Frederic

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Mar 22, 2003, 10:39:46 PM3/22/03
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Hi,

I put the following iptable rule in:
iptables -A INPUT -p udp --dport 68 -j DROP
But when I run nmap it still shows that the port is open?

I am running Redhat 8.0

Any ideas?

Thanks,

Frederic


Tuan Nguyen

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Mar 26, 2003, 2:53:46 PM3/26/03
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On Sat, 22 Mar 2003 22:39:46 -0500, "Frederic" <fred...@drivel.net>
wrote:

>Hi,
>
>I put the following iptable rule in:
>iptables -A INPUT -p udp --dport 68 -j DROP
>But when I run nmap it still shows that the port is open?
>
>I am running Redhat 8.0
>

iptables filtes the packets, not stop the "listning". In your case
port 68. If you want to close port 68 you need to stop the
service/daemon which uses that port. Use nmap to show where the port
is staring from. Use service to stop a service.

GL Tuan


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