> I remember seeing an example using WinXP raw socket to
> sniff network traffic. Raw socket support has been added
> to ICS (but I have no experience with it yet.) I wonder if
> ICS raw socket can be used to sniff traffic sent to local
> PC?

My Internet Packet Monitoring Components can be downloaded from 
http://www.magsys.co.uk/delphi/, and will monitor using either raw 
sockets or winpcap.  

> Basically, I'd like to know the IP and MAC address of the default
> gateway. If not raw socket, any other ways to know that?
> I can probably use winpcap to sniff the traffic but I would
> not use it if I don't have to.

You can use my Internet Protocol Helper Component, same URL (or the 
Usermade ICS page), to read the PC IP routing table which will give you 
the IP of the next hops for various destination addresses, since there 
may be multiple gateways.  The ARP table gives you the MAC for the IPs 
you found.  There's a demo program that lists all this stuff. 

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