Re: Capture filter question

[David Alanis <canito () dalan us>]

Quoting Marco Zuppone <msz () msz it>:

> Hello,
>
> I have a question about capture filters.
> I noticed that the basic capture filter predefined in Wireshark to   
> do not capture arp and DNS requests is defined in this way:
> not arp and port not 53
>
> What is the difference with: not arp and not port 53?
>
> Thanks in advance
>  Marco - StockTrader
> ___________________________________________________________________________
> Sent via:    Wireshark-users mailing list <wireshark-users () wireshark org>
> Archives:    http://www.wireshark.org/lists/wireshark-users
> Unsubscribe: https://wireshark.org/mailman/options/wireshark-users
>              mailto:wireshark-users-request () wireshark org?subject=unsubscribe

I don't quite know about the capture filter whether default or not.  
'not arp' means that it will filter out the address resolution  
protocol communication and 'not arp' will filter out communication  
over port 53, mostly if not absolutely DNS requests.

You can read more about ARP here:
http://www.tildefrugal.net/tech/arp.php

Cheers-

----------------------------------------------------------------
This message was sent using IMP, the Internet Messaging Program.

___________________________________________________________________________
Sent via:    Wireshark-users mailing list <wireshark-users () wireshark org>
Archives:    http://www.wireshark.org/lists/wireshark-users
Unsubscribe: https://wireshark.org/mailman/options/wireshark-users
            mailto:wireshark-users-request () wireshark org?subject=unsubscribe