On 05/23/2014 02:39 PM, Alan Bartlett wrote:
> On 23 May 2014 22:25, ToddAndMargo <[log in to unmask]> wrote:
>> On 05/23/2014 02:08 PM, Alan Bartlett wrote:
>>>
>>> On 23 May 2014 22:02, ToddAndMargo <[log in to unmask]> wrote:
>>>>
>>>> Hi All,
>>>>
>>>> Is there some special meaning (like 127.0.0.1.) to
>>>> the following IP address?
>>>>
>>>>       224.0.0.251
>>>>
>>>> Many thanks,
>>>> -T
>>>
>>>
>>> It is an IP Multicast address.
>>>
>>> host 224.0.0.251
>>>
>>> will tell you a bit more.
>>>
>>> Alan.
>>>
>>
>> Hi Alan,
>>
>> $ host 224.0.0.251
>> Host 251.0.0.224.in-addr.arpa. not found: 3(NXDOMAIN)
>>
>> Not sure what I am suppose to find.
>>
>> This is why I ask (VLC's doing):
>>
>> kernel: Vlan-out Everything Else IN= OUT=eth0.5 SRC=192.168.254.10
>> DST=224.0.0.251 LEN=56 TOS=0x00 PREC=0x00 TTL=255 ID=0 DF PROTO=UDP SPT=5353
>> DPT=5353 LEN=36
>>
>> eth0.5 is a virtual Ethernet too, not hooked to the Internet.
>>
>> And port 3535 UDP?
>>
>> $ grep -i 3535 /etc/services
>> ms-la           3535/tcp                # MS-LA
>> ms-la           3535/udp                # MS-LA
>>
>>
>> Thank you for the help,
>> -T
>
> Oops. Typo time. Substitute "whois" for "host".
>
> Sorry for the confusion.
>
> Alan.
>

Hi Alan,

Really slick command.  Love it!  Thank you!  :-)

I never would have learned this from Google.

-T


# yum --enablerepo=* whatprovides */whois
jwhois-4.0-19.el6.x86_64 : Internet whois/nicname client
Repo        : sl
Matched from:
Filename    : /usr/bin/whois

# yum install jwhois

# whois 224.0.0.251

      Comment: Addresses starting with a number between 224
      and 239 are used for IP multicast.  IP multicast is a
      technology for efficiently sending the same content
      to multiple destinations.  It is commonly used for
      distributing financial information and video streams,
      among other things.

      Comment: A document describing the policies for
      assigning multicast addresses can be found at:
           http://datatracker.ietf.org/doc/rfc5771