Re: TCP vs UDP

[Xaos <xaos () compulink gr>]

Although i'm not an expert i would say it depends on the port... Say for 
example that we're talking about a DNS server... surely you'll leave 
open the UDP port 53 so that i will answer to clients but you won't open 
TCP 53 as well unless you want to allow everybody to perform zone 
transfers...
I think that sort of rule more or less applies to all the other ports as 
well... If you don't need it open.. close it... :-)

Xaos

Roberto Ramsis wrote:

> hello
> thanks to everyone who replied to my last msg
> what's the difference between a port TCP and UDP?
> i am talking from a firewall concept,i want to know ,if i need to 
> block a port,when should i block TCP and when UDP and when both?
> Thanks in advance
>
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