How do i prevent portscanning?

you cant prevent it unless you disconnect your pc from the internet...the best alternative is to make the ports stealthy or closed. Get a good firewall that will stealth your ports and or close them to all pings and requests.
 
you cant stop anyone scanning then, though you may be able to pick a scan up in your router logs or with a network monitor program.

The best thing is to either close the ports you don't need or as MrHat said, use a firewall with "stealths" the ports that are open so they can not bee seen or apear closed
 
Use a technology called NAT which does not allow remote hosts to connect to your network, however they can still do a port scan. You can set up dummy ports and/or other things to make it more difficult. However, most networks are on private IPs with only one Public IP giving them internet access typically.
 
actually, im being portscanned by my isp, for reasons i dont know,
is windows firewall good enuf to block these attacks?
i had installed norton internet security because i kno tht it reports these blocks, i kno tht norton sux, but i had to use it.
Use a technology called NAT which does not allow remote hosts to connect to your network, however they can still do a port scan. You can set up dummy ports and/or other things to make it more difficult. However, most networks are on private IPs with only one Public IP giving them internet access typically.
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yea ill try this
 
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