how to specify a source port?

[Federico Donati]

Dennis Jenkins wrote:

> If your Nagios server is running BSD or Linux then you can use the 
> built-in firewall to transparently change the port.  Kind of like NAT, 
> but just for the port (some vendors (Juniper) call this PAT).  I suppose 
> that Solaris and Windows might have this ability too, but I'm not that 
> familiar with their equivalent of iptables / ipfw.

Yes, it runs under Linux and i know how to nat/pat packets, but i'm
fairly paranoid and i would like to keep it simple.
But in the end, you're right, this is more easy to apply than begin to
script in perl using hping or something like that.

I can use a masquerade rule in the iptables postrouting chains. So, i
will do that way, until developers will integrate source port option.

Thanks for the reply and the suggestion :)

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