[GLLUG] IP Address Issue

[Flaga, Michael]

Avoid ending in Zero. I have ran into many problems, with customers who attempt this.
Sometimes it works and sometimes it don't. It really depends on the equipment its os and its flavor, too many variables to guess. Just avoid it.
It was many years ago. I seem to recall it is legit to end in zero. But I have not had such problems about it, since we've avoid it.
I would (and we do) call up and get a different value, when assigned zero.

Michael P. Flaga, michael at flaga.net



Traditionally, the gateway is the lowest IP address (or sometimes the highest).  It would be very unlikely to be right in the middle of a range like that.  There are at least two different things wrong with your situation, either it's a /22 and the netmask + router are wrong, or it's a /24 and the whois + IP are wrong.  Either way, someone screwed up bad somewhere.

On Mon, Oct 8, 2012 at 7:43 PM, Patrick Collora <collorap at pjc.name> wrote:
> Web browsing worked without the router, but I'm not sure that there
> wouldn't have been other issues.  I see the following in WHOIS.
>
> NetRange    108.68.140.0 - 108.68.143.255
> CIDR    108.68.140.0/22
>
> Does this suggest that the netmask should be 255.255.252.0, not
> 255.255.255.0?  Given the former, 108.68.143.0 should be free to assign.
>
> Cody Dean wrote:
>
> Normally they avoid the .0 when setting up an IP scheme, but it can be used.
> Found this: http://www.dslreports.com/forum/remark,22121455 which may
> be relevant.
>
> Were you able to connect without the router attached?
>
> Cody
>
>
> Richard Houser wrote:
>
> It depends on the netmask.  In this case, you are on a class C, so the
> first valid IP would start at 1 and go to 254 in the last octet.
> Whomever setup that dhcp server is an idiot.
>
> On Oct 8, 2012 6:44 PM, "Patrick Collora" <collorap at pjc.name> wrote:
>>
>> Not Linux-specific, but maybe someone here knows the answer.  I was
>> having some trouble connecting to the Internet through my router, and
>> I suspect it might be due to the IP address I was assigned.  When I
>> bypassed the router, AT&T assigned the following to my PC.
>>
>>    IPv4 Address. . . . . . . . . . . : 108.68.143.0
>>    Subnet Mask . . . . . . . . . . . : 255.255.255.0
>>    Default Gateway . . . . . . . . . : 108.68.143.1
>>
>> Is the IP ending in zero valid, or is it the network identifier?
>>
>> Thanks.
>> -Patrick
>>
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>> linux-user at egr.msu.edu
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>
>
> --
> Patrick Collora
>
>
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