Re: [cobalt-users] IP addys

[Jeff Lasman <jblists@xxxxxxxxxxxxx>]

This doesn't work either.

How do I know?  I tried it.

I've got a RaQ2 that's got 209.126.157.77 assigned to it.  I haven't got 
anything answering yet for that domain.  When I traceroute to it, the 
traceroute fails at the router.

I set up a new domain, hostname of www, and domain name of 
jeff.nobaloney.net.  The IP# I used was 209.126.157.077 (note the leading 
zero in the last set of numbers).

I tried to traceroute to the box, using 209.126.157.77 (note, no leading 
zero in the last set of numbers); again, it failed at the router.

I set up another new domain, this time hostname of www, and domain name of 
mike.nobaloney.net.  This time I used 209.126.157.77 (note there's no 
leading zero in the last set of numbers).

I tried another traceroute to 209.126.157.77 (no leading zero).  This one 
succeeded to the box.

I deleted the domain mike.baloney.net, and tried a traceroute (using the 
Windows NT tracert client) to 209.126.157.077 (with the leading zero).  It 
made it all the way to the box (which is still hosting the domain 
jeff.nobaloney.net, with the IP# 209.126.157.077).

I then deleted that domain; then I couldn't traceroute either way.

So I suppose if everyone knows to type in your IP# WITH the leading zero, 
it'll work as long as software implemenations don't change.

However, it's incorrect usage, it's against the RFCs, there's no 
expectation that any system will ever find you, and since nameservers will 
resolve to 209.126.157.77 and NOT to 209.126.157.077, most systems won't 
ever find you.

I wouldn't do it.  If you need to keep a list of domains that lines up 
right, there are two ways to do it. One is to use a completely different, 
hidden, field, for your key field.  Create the field automatically, 
removing the decimals and adding leading zeros when necessary.  Another way 
to do it is the way I do it: I use MS Access to keep track of domains and 
IP#s.  But when i put them into the box, I DON'T  use the leading zeros.

Jeff

At 11:28 AM 3/14/00 -0800, you wrote:
> Mostly I want to know just when setting up during admin time. I want the IP
> addys to sort correctly, so leading zeros are needed...
>
> Currently
> 123.456.789.100
> 123.456.789.102
> 123.456.789.103
> 123.456.789.98
> 123.456.789.99
>
> And I would like
> 123.456.789.098
> 123.456.789.099
> 123.456.789.100
> 123.456.789.101
> 123.456.789.102

--
Jeff Lasman <jblists@xxxxxxxxxxxxx>